The Experts below are selected from a list of 1692 Experts worldwide ranked by ideXlab platform
Govindaraj Magudeeswaran - One of the best experts on this subject based on the ideXlab platform.
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Metallurgical characteristics of armour steel welded joints used for combat vehicle construction
Elsevier, 2018Co-Authors: Govindaraj Magudeeswaran, V. Balasubramanian, Madhusudhan G ReddyAbstract:Austenitic stainless steel (ASS) and High nickel steel (HNS) Welding Consumables are being used for Welding Q&T steels, as they have higher solubility for hydrogen in austenitic phase, to avoid hydrogen induced cracking (HIC) but they are very expensive. In recent years, the developments of low hydrogen ferritic steel (LHF) Consumables that contain no hygroscopic compounds are utilized for Welding Q&T steels. Heat affected zone (HAZ) softening is another critical issue during Welding of armour grade Q&T steels and it depends on the Welding process employed and the weld thermal cycle. In this investigation an attempt has been made to study the influence of Welding Consumables and Welding processes on metallurgical characteristics of armour grade Q&T steel joints by various metallurgical characterization procedures. Shielded metal arc Welding (SMAW) and flux cored arc Welding (FCAW) processes were used for making welds using ASS, LHF and HNS Welding Consumables. The joints fabricated by using LHF Consumables offered lower degree of HAZ softening and there is no evidence of HIC in the joints fabricated using LHF Consumables. Keywords: Armour grade Q&T steel, Heat affected zone softening, Shielded metal arc Welding process, Flux cored arc Welding process, Austenitic stainless steel, Low hydrogen ferritic steel, High nickel stee
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Metallurgical characteristics of armour steel welded joints used for combat vehicle construction
Defence Technology, 2018Co-Authors: Govindaraj Magudeeswaran, V. Balasubramanian, G. Madhusudan ReddyAbstract:Abstract Austenitic stainless steel (ASS) and High nickel steel (HNS) Welding Consumables are being used for Welding Q&T steels, as they have higher solubility for hydrogen in austenitic phase, to avoid hydrogen induced cracking (HIC) but they are very expensive. In recent years, the developments of low hydrogen ferritic steel (LHF) Consumables that contain no hygroscopic compounds are utilized for Welding Q&T steels. Heat affected zone (HAZ) softening is another critical issue during Welding of armour grade Q&T steels and it depends on the Welding process employed and the weld thermal cycle. In this investigation an attempt has been made to study the influence of Welding Consumables and Welding processes on metallurgical characteristics of armour grade Q&T steel joints by various metallurgical characterization procedures. Shielded metal arc Welding (SMAW) and flux cored arc Welding (FCAW) processes were used for making welds using ASS, LHF and HNS Welding Consumables. The joints fabricated by using LHF Consumables offered lower degree of HAZ softening and there is no evidence of HIC in the joints fabricated using LHF Consumables.
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influences of flux cored arc Welding Consumables on dynamic fracture toughness j1d of armour grade q t steel joints
Fatigue & Fracture of Engineering Materials & Structures, 2009Co-Authors: Govindaraj Magudeeswaran, Venkatesh Balasubramanian, Madhusudhan G Reddy, S. Sathyanarayanan, A. Moitra, S. Venugopal, G. SasikalaAbstract:Quenched and tempered (Q&T) steels are prone to hydrogen-induced cracking in the HAZ after Welding. Austenitic stainless steel (ASS) Welding Consumables are traditionally used for Welding of high hardness Q&T steels as they have higher solubility for hydrogen. The use of stainless steel Consumables for a non-stainless steel base metal is not economical. In recent years, the developments of low hydrogen ferritic steel (LHF) Consumables that contain no hygroscopic compounds are utilized for Welding of Q&T steels The use of ASS and LHF Consumables for armour grade Q&T steel will lead to formation of distinct microstructures in their respective welds. This microstructural heterogeneity will have a drastic influence in the dynamic fracture toughness of the armour grade Q&T steel welds. Hence, an attempt was made in this paper to study the influence of flux-cored arc Welding Consumables on dynamic fracture toughness (J 1d ) of armour grade Q&T steel joints. The flux-cored arc Welding Consumables have a significant effect on the dynamic fracture toughness of the armour grade Q&T steel welds. The joints fabricated using ASS flux-cored wires showed superior J 1d values than the joints fabricated using LHF Consumables and the base metal.
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Effect of Welding Consumables on Fatigue Performance of Shielded Metal Arc Welded High Strength, Q&T Steel Joints
Journal of Materials Engineering and Performance, 2009Co-Authors: Govindaraj Magudeeswaran, Venkatesh Balasubramanian, G. Madhusudhan ReddyAbstract:Quenched and Tempered (Q&T) steels are widely used in the construction of military vehicles due to their high strength-to-weight ratio and high hardness. These steels are prone to hydrogen-induced cracking in the heat affected zone (HAZ) after Welding. The use of austenitic stainless steel Consumables to weld the above steel was the only remedy because of higher solubility for hydrogen in austenitic phase. Recent studies proved that high nickel steel and low hydrogen ferritic steel Consumables can be used to weld Q&T steels, which can give very low hydrogen levels in the weld deposits. In this investigation an attempt has been made to study the effect of Welding Consumables on high cycle fatigue properties of high strength, Q&T steel joints. Three different Consumables namely (i) austenitic stainless steel, (ii) low hydrogen ferritic steel, and (iii) high nickel steel have been used to fabricate the joints by shielded metal arc (SMAW) Welding process. The joints fabricated using low hydrogen ferritic steel electrodes showed superior fatigue properties than other joints.
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Influences of flux‐cored arc Welding Consumables on dynamic fracture toughness (J1d) of armour grade Q&T steel joints
Fatigue & Fracture of Engineering Materials & Structures, 2009Co-Authors: Govindaraj Magudeeswaran, Venkatesh Balasubramanian, S. Sathyanarayanan, G. Madhusudhan Reddy, A. Moitra, S. Venugopal, G. SasikalaAbstract:Quenched and tempered (Q&T) steels are prone to hydrogen-induced cracking in the HAZ after Welding. Austenitic stainless steel (ASS) Welding Consumables are traditionally used for Welding of high hardness Q&T steels as they have higher solubility for hydrogen. The use of stainless steel Consumables for a non-stainless steel base metal is not economical. In recent years, the developments of low hydrogen ferritic steel (LHF) Consumables that contain no hygroscopic compounds are utilized for Welding of Q&T steels The use of ASS and LHF Consumables for armour grade Q&T steel will lead to formation of distinct microstructures in their respective welds. This microstructural heterogeneity will have a drastic influence in the dynamic fracture toughness of the armour grade Q&T steel welds. Hence, an attempt was made in this paper to study the influence of flux-cored arc Welding Consumables on dynamic fracture toughness (J 1d ) of armour grade Q&T steel joints. The flux-cored arc Welding Consumables have a significant effect on the dynamic fracture toughness of the armour grade Q&T steel welds. The joints fabricated using ASS flux-cored wires showed superior J 1d values than the joints fabricated using LHF Consumables and the base metal.
Madhusudhan G Reddy - One of the best experts on this subject based on the ideXlab platform.
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Influence of Welding Consumables on tensile and impact properties of multi-pass SMAW Armox 500T steel joints vis-a-vis base metal
Elsevier, 2018Co-Authors: Ambuj Saxena, Madhusudhan G Reddy, A. Kumaraswamy, Vemuri MadhuAbstract:In this investigation, comparative study of tensile and impact properties of multi-pass SMAW Armox 500T steel joints fabricated by austenitic stainless steel (ASS) and low hydrogen ferritic steel (LHF) Consumables vis-a-vis base metal was carried out. The tensile tests were conducted on computer controlled Walter + Bai Ag UTM at a nominal strain rate of 10−3 s−1. Subsequently, charpy impact tests were carried out on an instrumented Zwick-Roell test setup to obtain load vs. displacement and maximum energy absorbed vs. displacement of the specimen. It was observed that, the joint efficiency of weldment processed by LHF consumable was 41.7% and weldment processed by ASS was 30.6% of its base metal indicating the influence of electrode consumable on tensile properties of the joints. On the contrary, impact toughness of weldment processed by ASS was 20% more and weldment processed by LHF was 12% less than that of base metal. Microstructural studies also revealed that, ASS can be considered as a candidate Welding consumable for good strain hardening and toughness of the Welding joint in impact applications. However, LHF steel consumable is recommended for Welding joints that requires higher joint efficiency under tensile loading conditions. Keywords: Armox500T, Multi-pass SMA Welding, ASS and LHF Welding Consumables, Mechanical properties, Microstructural characterizatio
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Metallurgical characteristics of armour steel welded joints used for combat vehicle construction
Elsevier, 2018Co-Authors: Govindaraj Magudeeswaran, V. Balasubramanian, Madhusudhan G ReddyAbstract:Austenitic stainless steel (ASS) and High nickel steel (HNS) Welding Consumables are being used for Welding Q&T steels, as they have higher solubility for hydrogen in austenitic phase, to avoid hydrogen induced cracking (HIC) but they are very expensive. In recent years, the developments of low hydrogen ferritic steel (LHF) Consumables that contain no hygroscopic compounds are utilized for Welding Q&T steels. Heat affected zone (HAZ) softening is another critical issue during Welding of armour grade Q&T steels and it depends on the Welding process employed and the weld thermal cycle. In this investigation an attempt has been made to study the influence of Welding Consumables and Welding processes on metallurgical characteristics of armour grade Q&T steel joints by various metallurgical characterization procedures. Shielded metal arc Welding (SMAW) and flux cored arc Welding (FCAW) processes were used for making welds using ASS, LHF and HNS Welding Consumables. The joints fabricated by using LHF Consumables offered lower degree of HAZ softening and there is no evidence of HIC in the joints fabricated using LHF Consumables. Keywords: Armour grade Q&T steel, Heat affected zone softening, Shielded metal arc Welding process, Flux cored arc Welding process, Austenitic stainless steel, Low hydrogen ferritic steel, High nickel stee
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influences of flux cored arc Welding Consumables on dynamic fracture toughness j1d of armour grade q t steel joints
Fatigue & Fracture of Engineering Materials & Structures, 2009Co-Authors: Govindaraj Magudeeswaran, Venkatesh Balasubramanian, Madhusudhan G Reddy, S. Sathyanarayanan, A. Moitra, S. Venugopal, G. SasikalaAbstract:Quenched and tempered (Q&T) steels are prone to hydrogen-induced cracking in the HAZ after Welding. Austenitic stainless steel (ASS) Welding Consumables are traditionally used for Welding of high hardness Q&T steels as they have higher solubility for hydrogen. The use of stainless steel Consumables for a non-stainless steel base metal is not economical. In recent years, the developments of low hydrogen ferritic steel (LHF) Consumables that contain no hygroscopic compounds are utilized for Welding of Q&T steels The use of ASS and LHF Consumables for armour grade Q&T steel will lead to formation of distinct microstructures in their respective welds. This microstructural heterogeneity will have a drastic influence in the dynamic fracture toughness of the armour grade Q&T steel welds. Hence, an attempt was made in this paper to study the influence of flux-cored arc Welding Consumables on dynamic fracture toughness (J 1d ) of armour grade Q&T steel joints. The flux-cored arc Welding Consumables have a significant effect on the dynamic fracture toughness of the armour grade Q&T steel welds. The joints fabricated using ASS flux-cored wires showed superior J 1d values than the joints fabricated using LHF Consumables and the base metal.
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effect of Welding processes and Consumables on high cycle fatigue life of high strength quenched and tempered steel joints
Materials & Design, 2008Co-Authors: Govindaraj Magudeeswaran, V. Balasubramanian, Madhusudhan G ReddyAbstract:Austenitic stainless steel (ASS) Welding Consumables are traditionally used for Welding quenched and tempered steels as they have higher solubility for hydrogen in austenitic phase. An attempt was made in this investigation to explore an alternate consumable to replace expensive ASS Consumables. Austenitic stainless steel and low hydrogen ferritic steel were used to fabricate the joints by shielded metal arc Welding and flux cored arc Welding processes. The joints fabricated using low hydrogen ferritic steel Consumables showed superior fatigue performance than the joints fabricated using ASS Consumables.
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effect of Welding Consumables on tensile and impact properties of shielded metal arc welded high strength quenched and tempered steel joints
Science and Technology of Welding and Joining, 2008Co-Authors: Govindaraj Magudeeswaran, Venkatesh Balasubramanian, T S Balasubramanian, Madhusudhan G ReddyAbstract:AbstractQuenched and tempered (Q&T) steels are widely used in the construction of military vehicles due to its high strength to weight ratio and high hardness. These steels are prone to hydrogen induced cracking in the heat affected zone (HAZ) after Welding and HAZ softening. The use of austenitic stainless steel (ASS) Consumables to weld the above steel was the only remedy because of higher solubility for hydrogen in austenitic phase. Recent studies proved that high nickel steel (HNS) and low hydrogen ferritic (LHF) steel Consumables can be used to weld Q&T steels, which can give very low hydrogen levels in the weld deposits. In this investigation an attempt has been made to study the effect of Welding Consumables on tensile and impact properties of high strength, Q&T steel joints. Three different Consumables, namely ASS, LHF steel and HNS have been used to fabricate the joints by shielded metal arc Welding (SMAW) process. The joints fabricated using LHF steel electrodes showed superior transverse tensil...
Ronald Schnitzer - One of the best experts on this subject based on the ideXlab platform.
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Microstructure and mechanical properties of high-strength steel Welding Consumables with a minimum yield strength of 1100 MPa
Journal of Materials Science, 2018Co-Authors: Phillip Haslberger, Wolfgang Ernst, Sandor Holly, Ronald SchnitzerAbstract:Welded high-strength steel components have great potential for use in lightweight constructions or highly loaded structures. Welding of steels with a yield strength of more than 1100 MPa is particularly challenging because of the toughness requirements for the weld metal. Currently, a new generation of Welding Consumables with a minimum yield strength of 1100 MPa has been developed. Based on electron backscatter diffraction and atom probe tomography, a concept for toughening and strengthening of all-weld metal samples was deployed. Starting from a martensitic all-weld metal sample with an approximate yield strength of 1000 MPa, a reduction in manganese and silicon content resulted in a refined microstructure with a lower prior austenite grain size and effective grain size. Furthermore, a higher average grain boundary misorientation was measured, which influences the toughness positively. An addition of vanadium caused the formation of vanadium-rich clusters, which increased the strength of the all-weld metal significantly. With a combination of these two mechanisms, it was possible to produce an all-weld metal sample with the required yield strength of more than 1100 MPa and an acceptable toughness.
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Microstructure and mechanical properties of high-strength steel Welding Consumables with a minimum yield strength of 1100 MPa
Journal of Materials Science, 2018Co-Authors: Phillip Haslberger, Wolfgang Ernst, Sandor Holly, Ronald SchnitzerAbstract:Welded high-strength steel components have great potential for use in lightweight constructions or highly loaded structures. Welding of steels with a yield strength of more than 1100 MPa is particularly challenging because of the toughness requirements for the weld metal. Currently, a new generation of Welding Consumables with a minimum yield strength of 1100 MPa has been developed. Based on electron backscatter diffraction and atom probe tomography, a concept for toughening and strengthening of all-weld metal samples was deployed. Starting from a martensitic all-weld metal sample with an approximate yield strength of 1000 MPa, a reduction in manganese and silicon content resulted in a refined microstructure with a lower prior austenite grain size and effective grain size. Furthermore, a higher average grain boundary misorientation was measured, which influences the toughness positively. An addition of vanadium caused the formation of vanadium-rich clusters, which increased the strength of the all-weld metal significantly. With a combination of these two mechanisms, it was possible to produce an all-weld metal sample with the required yield strength of more than 1100 MPa and an acceptable toughness.
Phillip Haslberger - One of the best experts on this subject based on the ideXlab platform.
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Microstructure and mechanical properties of high-strength steel Welding Consumables with a minimum yield strength of 1100 MPa
Journal of Materials Science, 2018Co-Authors: Phillip Haslberger, Wolfgang Ernst, Sandor Holly, Ronald SchnitzerAbstract:Welded high-strength steel components have great potential for use in lightweight constructions or highly loaded structures. Welding of steels with a yield strength of more than 1100 MPa is particularly challenging because of the toughness requirements for the weld metal. Currently, a new generation of Welding Consumables with a minimum yield strength of 1100 MPa has been developed. Based on electron backscatter diffraction and atom probe tomography, a concept for toughening and strengthening of all-weld metal samples was deployed. Starting from a martensitic all-weld metal sample with an approximate yield strength of 1000 MPa, a reduction in manganese and silicon content resulted in a refined microstructure with a lower prior austenite grain size and effective grain size. Furthermore, a higher average grain boundary misorientation was measured, which influences the toughness positively. An addition of vanadium caused the formation of vanadium-rich clusters, which increased the strength of the all-weld metal significantly. With a combination of these two mechanisms, it was possible to produce an all-weld metal sample with the required yield strength of more than 1100 MPa and an acceptable toughness.
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Development of high-strength Welding Consumables using calculations and microstructural characterisation
Welding in the World, 2018Co-Authors: S. Holly, Phillip Haslberger, D. Zügner, R. Schnitzer, E. KozeschnikAbstract:The development of new Welding Consumables requires several samples and experiments that must be performed to achieve the required mechanical properties. In the development of a metal-cored wire with a target tensile strength of 1150 MPa and acceptable impact toughness, thermodynamic and kinetic calculations via MatCalc were used to reduce the experimental work and the resources required. Micro-alloying elements were employed to obtain high strength as an alternative approach to conventional solid solution hardening. Investigations of the microstructure were performed via atom probing to understand the effects of micro-alloying elements. In particular, the influences of different elements on the precipitation behaviour in the weld metal were evaluated. The calculated mechanical properties are in accordance with the results obtained from experiments and can be explained by microstructural investigations. The approach is exemplified through vanadium and clarifies an efficient development route.
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Microstructure and mechanical properties of high-strength steel Welding Consumables with a minimum yield strength of 1100 MPa
Journal of Materials Science, 2018Co-Authors: Phillip Haslberger, Wolfgang Ernst, Sandor Holly, Ronald SchnitzerAbstract:Welded high-strength steel components have great potential for use in lightweight constructions or highly loaded structures. Welding of steels with a yield strength of more than 1100 MPa is particularly challenging because of the toughness requirements for the weld metal. Currently, a new generation of Welding Consumables with a minimum yield strength of 1100 MPa has been developed. Based on electron backscatter diffraction and atom probe tomography, a concept for toughening and strengthening of all-weld metal samples was deployed. Starting from a martensitic all-weld metal sample with an approximate yield strength of 1000 MPa, a reduction in manganese and silicon content resulted in a refined microstructure with a lower prior austenite grain size and effective grain size. Furthermore, a higher average grain boundary misorientation was measured, which influences the toughness positively. An addition of vanadium caused the formation of vanadium-rich clusters, which increased the strength of the all-weld metal significantly. With a combination of these two mechanisms, it was possible to produce an all-weld metal sample with the required yield strength of more than 1100 MPa and an acceptable toughness.
Sun Xian - One of the best experts on this subject based on the ideXlab platform.
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Selection and application of Welding Consumables for T91/P91 steel
Electric Welding Machine, 2012Co-Authors: Sun XianAbstract:The weldability of T91/P91 steel was analyzed,the selection principle of the steel Welding Consumables was discussed and the types and applications of the steel Welding Consumables were introduced.The results show that the Welding consumable selection of T91/P91 steel can use "quasi-element matching" principle,that is to make the main chemical composition of the weld metal close to base metal as far as possible,and to guarantee the welded joint obtaining the best mechanical properties(including high temperature properties) and weldability.There are five kinds of Welding Consumables used in T91/P91steel,the new Welding technology of backing Welding by FCAW plus filling Welding by GMAW has obvious advantages.The applications of matching Welding Consumables and appropriate Welding technology in pipeline Welding are successful.The special flux cored wire for T91/P91 steel is a new Welding consumable with development prospect and need improvement.
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selection and application of Welding Consumables for t91 p91 steel
Electric Welding Machine, 2012Co-Authors: Sun XianAbstract:The weldability of T91/P91 steel was analyzed,the selection principle of the steel Welding Consumables was discussed and the types and applications of the steel Welding Consumables were introduced.The results show that the Welding consumable selection of T91/P91 steel can use "quasi-element matching" principle,that is to make the main chemical composition of the weld metal close to base metal as far as possible,and to guarantee the welded joint obtaining the best mechanical properties(including high temperature properties) and weldability.There are five kinds of Welding Consumables used in T91/P91steel,the new Welding technology of backing Welding by FCAW plus filling Welding by GMAW has obvious advantages.The applications of matching Welding Consumables and appropriate Welding technology in pipeline Welding are successful.The special flux cored wire for T91/P91 steel is a new Welding consumable with development prospect and need improvement.
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Development and Application of Build-Up Welding Consumables for Wear-resistant Belt of Petroleum Drilling Pipe Tie-in
Petroleum Engineering Construction, 2007Co-Authors: Sun XianAbstract:The working principle, performance characteristics and influence factors of the wear-resistant belt of the petroleum drilling pipe were analyzed. The development of the build-up Welding Consumables for the wear-resistant belt was commented and the application of such Consumables was introduced. The material character is a central factor affecting the wearability of the wear-resistant belt. The theory of "material control performance" plays an active role in the technical development of the wear-resistant belt. The advantage of the ARNCO wear-resistant belt was validated by practical applications. The main technology index of domestic product PT100 surpasses that of tungsten carbide wear-resistant belt.
