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Ravindra V Taiwade – One of the best experts on this subject based on the ideXlab platform.

  • Evolution of Metallurgical Phases and Its Co-relation with Mechanical Properties and Corrosion Resistance of 22Cr–5Ni–3Mo and 16Cr–10Ni–2Mo Dissimilar Weldments
    Metallography Microstructure and Analysis, 2019
    Co-Authors: Jagesvar Verma, Ravindra V Taiwade, Ravinder Kataria, Vipin Tandon

    Abstract:

    22Cr–5Ni–3Mo is highly sustainable in aggressive environments and also better substitute of 16Cr–10Ni–2Mo Austenitic Grade, which illustrates the unavoidability of dissimilar joint in many corrosive environments for cost effectiveness. The information about welding parameters, microstructure, mechanical properties, texture, and corrosion resistance behavior in highly harsh environment of dissimilar weld by common fusion welding is limited. The present study addresses dissimilar welds between 22Cr–5Ni–3Mo and 16Cr–10Ni–2Mo stainless steels, employing SMAW process by using two different weld parameters (based on current) and investigates the microstructural evolution and correlated with mechanical and corrosion resistance of the weldment. The microstructural studies were done by using an optical microscope and scanning electron microscopy. Mechanical properties are studied in terms of tensile strength and hardness. The electrochemical assessments were carried out including modified double-loop electrochemical potentiodynamic reactivation test and modified tensile test. EBSD analysis was carried out to know the grain size variation quantitatively in the weld metal and/or heat affected zone. Analyzed results showed the well-balanced ferrite/austenite amount for both high and low heat input. 16Cr–10Ni–2Mo base metal showed twin boundaries, whereas 22Cr–5Ni–3Mo base metal showed banded structure of ferrite and austenite. EBSD analysis revealed that the low heat input weld showed less grain growth as compared to high heat input with austenite orientation, because of lower misorientation. With increasing heat input, ferrite content of the weld region decreases resulting in lower hardness and tensile strength. Modified tensile test in chloride environment affected the plasticity of the materials. High heat input helps to increase the intergranular corrosion resistance by increasing austenite phase formation.

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  • dissimilar welding behavior of 22 cr series stainless steel with 316l and its corrosion resistance in modified aggressive environment
    Journal of Manufacturing Processes, 2016
    Co-Authors: Jagesvar Verma, Ravindra V Taiwade

    Abstract:

    Abstract Superior sustainability in highly aggressive environment makes duplex stainless steels as a futuristic materials and better replacement of Austenitic Grade, which reflects an inevitability of dissimilar joint in many aggressive environments. In the present work, an attempt has been made to produce dissimilar welds between 22% Cr series duplex 2205 and 316L Austenitic stainless steel, employing shielded metal arc welding process, using two different welding parameters (corresponding to current) and studied the microstructural, mechanical properties and corrosion resistance of the weldment. Modified destructive and non-destructive tests were attempted in aggressive environment to assess the intergranular corrosion resistance and pitting characteristics of the weldments. The results of the analysis showed the balanced austenite/ferrite content for both heat inputs. Higher tensile strength and hardness was observed in the low heat input. Intergranular corrosion resistance was improved in high heat input, while, abrupt change in pitting characteristic was observed in the low heat input.

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  • Dissimilar welding behavior of 22% Cr series stainless steel with 316L and its corrosion resistance in modified aggressive environment
    Journal of Manufacturing Processes, 2016
    Co-Authors: Jagesvar Verma, Ravindra V Taiwade

    Abstract:

    Abstract Superior sustainability in highly aggressive environment makes duplex stainless steels as a futuristic materials and better replacement of Austenitic Grade, which reflects an inevitability of dissimilar joint in many aggressive environments. In the present work, an attempt has been made to produce dissimilar welds between 22% Cr series duplex 2205 and 316L Austenitic stainless steel, employing shielded metal arc welding process, using two different welding parameters (corresponding to current) and studied the microstructural, mechanical properties and corrosion resistance of the weldment. Modified destructive and non-destructive tests were attempted in aggressive environment to assess the intergranular corrosion resistance and pitting characteristics of the weldments. The results of the analysis showed the balanced austenite/ferrite content for both heat inputs. Higher tensile strength and hardness was observed in the low heat input. Intergranular corrosion resistance was improved in high heat input, while, abrupt change in pitting characteristic was observed in the low heat input.

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Jagesvar Verma – One of the best experts on this subject based on the ideXlab platform.

  • Evolution of Metallurgical Phases and Its Co-relation with Mechanical Properties and Corrosion Resistance of 22Cr–5Ni–3Mo and 16Cr–10Ni–2Mo Dissimilar Weldments
    Metallography Microstructure and Analysis, 2019
    Co-Authors: Jagesvar Verma, Ravindra V Taiwade, Ravinder Kataria, Vipin Tandon

    Abstract:

    22Cr–5Ni–3Mo is highly sustainable in aggressive environments and also better substitute of 16Cr–10Ni–2Mo Austenitic Grade, which illustrates the unavoidability of dissimilar joint in many corrosive environments for cost effectiveness. The information about welding parameters, microstructure, mechanical properties, texture, and corrosion resistance behavior in highly harsh environment of dissimilar weld by common fusion welding is limited. The present study addresses dissimilar welds between 22Cr–5Ni–3Mo and 16Cr–10Ni–2Mo stainless steels, employing SMAW process by using two different weld parameters (based on current) and investigates the microstructural evolution and correlated with mechanical and corrosion resistance of the weldment. The microstructural studies were done by using an optical microscope and scanning electron microscopy. Mechanical properties are studied in terms of tensile strength and hardness. The electrochemical assessments were carried out including modified double-loop electrochemical potentiodynamic reactivation test and modified tensile test. EBSD analysis was carried out to know the grain size variation quantitatively in the weld metal and/or heat affected zone. Analyzed results showed the well-balanced ferrite/austenite amount for both high and low heat input. 16Cr–10Ni–2Mo base metal showed twin boundaries, whereas 22Cr–5Ni–3Mo base metal showed banded structure of ferrite and austenite. EBSD analysis revealed that the low heat input weld showed less grain growth as compared to high heat input with austenite orientation, because of lower misorientation. With increasing heat input, ferrite content of the weld region decreases resulting in lower hardness and tensile strength. Modified tensile test in chloride environment affected the plasticity of the materials. High heat input helps to increase the intergranular corrosion resistance by increasing austenite phase formation.

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  • dissimilar welding behavior of 22 cr series stainless steel with 316l and its corrosion resistance in modified aggressive environment
    Journal of Manufacturing Processes, 2016
    Co-Authors: Jagesvar Verma, Ravindra V Taiwade

    Abstract:

    Abstract Superior sustainability in highly aggressive environment makes duplex stainless steels as a futuristic materials and better replacement of Austenitic Grade, which reflects an inevitability of dissimilar joint in many aggressive environments. In the present work, an attempt has been made to produce dissimilar welds between 22% Cr series duplex 2205 and 316L Austenitic stainless steel, employing shielded metal arc welding process, using two different welding parameters (corresponding to current) and studied the microstructural, mechanical properties and corrosion resistance of the weldment. Modified destructive and non-destructive tests were attempted in aggressive environment to assess the intergranular corrosion resistance and pitting characteristics of the weldments. The results of the analysis showed the balanced austenite/ferrite content for both heat inputs. Higher tensile strength and hardness was observed in the low heat input. Intergranular corrosion resistance was improved in high heat input, while, abrupt change in pitting characteristic was observed in the low heat input.

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  • Dissimilar welding behavior of 22% Cr series stainless steel with 316L and its corrosion resistance in modified aggressive environment
    Journal of Manufacturing Processes, 2016
    Co-Authors: Jagesvar Verma, Ravindra V Taiwade

    Abstract:

    Abstract Superior sustainability in highly aggressive environment makes duplex stainless steels as a futuristic materials and better replacement of Austenitic Grade, which reflects an inevitability of dissimilar joint in many aggressive environments. In the present work, an attempt has been made to produce dissimilar welds between 22% Cr series duplex 2205 and 316L Austenitic stainless steel, employing shielded metal arc welding process, using two different welding parameters (corresponding to current) and studied the microstructural, mechanical properties and corrosion resistance of the weldment. Modified destructive and non-destructive tests were attempted in aggressive environment to assess the intergranular corrosion resistance and pitting characteristics of the weldments. The results of the analysis showed the balanced austenite/ferrite content for both heat inputs. Higher tensile strength and hardness was observed in the low heat input. Intergranular corrosion resistance was improved in high heat input, while, abrupt change in pitting characteristic was observed in the low heat input.

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H.x. Yuan – One of the best experts on this subject based on the ideXlab platform.

  • experimental behaviour of stainless steel plate girders under combined bending and shear
    Journal of Constructional Steel Research, 2020
    Co-Authors: X W Chen, H.x. Yuan, E Real, X X Du, B W Schafer

    Abstract:

    Abstract The behaviour of stainless steel plate girders subjected to combined bending and shear was experimentally studied in this paper. Both tensile and compressive material properties of the two adopted stainless steel alloys, including Austenitic Grade EN 1.4301 and duplex Grade EN 1.4462, were determined by standard coupon tests. The three-dimensional (3D) optical scanning technology was introduced to acquire an accurate distribution of initial geometric imperfections for each plate girder specimen. A total of six plate girders were fabricated by hot-rolled stainless steel plates, and were tested to failure under combined bending and shear. In-depth analyses of the critical buckling characteristics, the ultimate resistances and the collapse behaviour of the tested specimens were all presented. The obtained ultimate resistances were further employed to assess the existing moment and shear (M-V) interaction design methods in EN 1993-1-5, GB 50017-2017, ANSI/AISC 360-16 and SEI/ASCE 8-02, and the design proposal presented by Jager et al. It has been found that most of the existing codified M-V interaction formulae can be applicable for both carbon steel and stainless steel plate girders, yet they lead to relatively conservative predictions for stainless steel plate girders, except that the design method in ANSI/AISC 360-16 provides apparently unsafe strength predictions.

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  • residual stress distributions in welded stainless steel sections
    Thin-walled Structures, 2014
    Co-Authors: H.x. Yuan, Yuanqing Wang, Leroy Gardner

    Abstract:

    Abstract Residual stress magnitudes and distributions in structural stainless steel built-up sections have been comprehensively investigated in this study. A total of 18 test specimens were fabricated from hot-rolled stainless steel plates by means of shielded metal arc welding (SMAW). Two Grades of stainless steel were considered, namely the Austenitic Grade EN 1.4301 and the duplex Grade EN 1.4462. Using the sectioning method, the test specimens were divided into strips. The residual stresses were then computed by multiplying the strains relieved during sectioning by the measured Young׳s moduli determined from tensile and compressive coupon tests. Residual stress distributions were obtained for 10 I-sections, four square hollow sections (SHS) and four rectangular hollow sections (RHS). Peak tensile residual stresses reached around 80% and 60% of the material 0.2% proof stress for Grades EN 1.4301 and EN 1.4462, respectively. Based upon the test data, simplified predictive models for residual stress distributions in stainless steel built-up I-sections and box sections were developed. Following comparisons with other available residual stress test data, the applicability of the proposed models was also extended to other stainless steel alloys. The proposed residual stress patterns are suitable for inclusion in future analytical models and numerical simulations of stainless steel built-up sections.

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