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V Balasubramanian - One of the best experts on this subject based on the ideXlab platform.

  • assessment of fatigue life and crack growth resistance of friction stir welded aisi 409m Ferritic Stainless Steel joints
    Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2012
    Co-Authors: A.k. Lakshminarayanan, V Balasubramanian
    Abstract:

    Abstract Fatigue life and fatigue crack growth behaviour of friction stir welded AISI 409M grade Ferritic Stainless Steel joints in comparison with the base metal was studied. The fatigue life and fatigue crack growth behaviour were evaluated using hourglass and centre cracked tension specimens, respectively. A 100 kN servo hydraulic controlled fatigue testing machine was used to test the specimens under constant amplitude uniaxial tensile load with a stress ratio of 0.1 and a frequency of 15 Hz. It is found that, the joint fabricated by the friction stir welding process showed superior fatigue life and fatigue crack growth resistance compared to that of the base metal. This was mainly due to the synergetic effect of dual phase Ferritic–martensitic microstructure, superior tensile properties and favourable residual stress, which inhibited the growth of cracks compared with that of the single phase Ferritic Stainless Steel base metal.

  • Tensile and Impact Properties of Shielded Metal Arc Welded AISI 409M Ferritic Stainless Steel Joints
    Journal of Materials Science & Technology, 2009
    Co-Authors: K. Shanmugam, A.k. Lakshminarayanan, V Balasubramanian
    Abstract:

    The present study is concerned with the efiect of flller metals such as austenitic Stainless Steel, Ferritic Stainless Steel and duplex Stainless Steel on tensile and impact properties of the Ferritic Stainless Steel conforming to AISI 409M grade. Rolled plates of 4 mm thickness were used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure and fracture surface morphology of the joints fabricated by austenitic Stainless Steel, Ferritic Stainless Steel and duplex Stainless Steel flller metals were evaluated and the results were reported. From this investigation, it is found that the joints fabricated by duplex Stainless Steel flller metal showed higher tensile strength and hardness compared to the joints fabricated by austenitic and Ferritic Stainless Steel flller metals. Joints fabricated by austenitic Stainless Steel flller metal exhibited higher ductility and impact toughness compared with the joints fabricated by Ferritic Stainless Steel and duplex Stainless Steel flller metals.

  • Fatigue Crack Growth Behavior of Gas Metal Arc Welded AISI 409 Grade Ferritic Stainless Steel Joints
    Journal of Materials Engineering and Performance, 2009
    Co-Authors: A.k. Lakshminarayanan, K. Shanmugam, V Balasubramanian
    Abstract:

    The effect of filler metals such as austenitic Stainless Steel, Ferritic Stainless Steel, and duplex Stainless Steel on fatigue crack growth behavior of the gas metal arc welded Ferritic Stainless Steel joints was investigated. Rolled plates of 4 mm thickness were used as the base material for preparing single ‘V’ butt welded joints. Center cracked tensile specimens were prepared to evaluate fatigue crack growth behavior. Servo hydraulic controlled fatigue testing machine with a capacity of 100 kN was used to evaluate the fatigue crack growth behavior of the welded joints. From this investigation, it was found that the joints fabricated by duplex Stainless Steel filler metal showed superior fatigue crack growth resistance compared to the joints fabricated by austenitic and Ferritic Stainless Steel filler metals. Higher yield strength and relatively higher toughness may be the reasons for superior fatigue performance of the joints fabricated by duplex Stainless Steel filler metal.

  • Effect of Autogenous Arc Welding Processes on Tensile and Impact Properties of Ferritic Stainless Steel Joints
    Journal of Iron and Steel Research International, 2009
    Co-Authors: A.k. Lakshminarayanan, K. Shanmugam, V Balasubramanian
    Abstract:

    The effect of autogeneous arc welding processes on tensile and impact properties of Ferritic Stainless Steel conformed to AISI 409M grade is studied. Rolled plates of 4 mm thickness have been used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure, and fracture surface morphology of continuous current gas tungsten arc welding (CCGTAW), pulsed current gas tungsten arc welding (PCGTAW), and plasma arc welding (PAW) joints are evaluated and the results are compared. It is found that the PAW joints of Ferritic Stainless Steel show superior tensile and impact properties when compared with CCGTAW and PCGTAW joints, and this is mainly due to lower heat input, finer fusion zone grain diameter, and higher fusion zone hardness.

A.k. Lakshminarayanan - One of the best experts on this subject based on the ideXlab platform.

  • assessment of fatigue life and crack growth resistance of friction stir welded aisi 409m Ferritic Stainless Steel joints
    Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2012
    Co-Authors: A.k. Lakshminarayanan, V Balasubramanian
    Abstract:

    Abstract Fatigue life and fatigue crack growth behaviour of friction stir welded AISI 409M grade Ferritic Stainless Steel joints in comparison with the base metal was studied. The fatigue life and fatigue crack growth behaviour were evaluated using hourglass and centre cracked tension specimens, respectively. A 100 kN servo hydraulic controlled fatigue testing machine was used to test the specimens under constant amplitude uniaxial tensile load with a stress ratio of 0.1 and a frequency of 15 Hz. It is found that, the joint fabricated by the friction stir welding process showed superior fatigue life and fatigue crack growth resistance compared to that of the base metal. This was mainly due to the synergetic effect of dual phase Ferritic–martensitic microstructure, superior tensile properties and favourable residual stress, which inhibited the growth of cracks compared with that of the single phase Ferritic Stainless Steel base metal.

  • Tensile and Impact Properties of Shielded Metal Arc Welded AISI 409M Ferritic Stainless Steel Joints
    Journal of Materials Science & Technology, 2009
    Co-Authors: K. Shanmugam, A.k. Lakshminarayanan, V Balasubramanian
    Abstract:

    The present study is concerned with the efiect of flller metals such as austenitic Stainless Steel, Ferritic Stainless Steel and duplex Stainless Steel on tensile and impact properties of the Ferritic Stainless Steel conforming to AISI 409M grade. Rolled plates of 4 mm thickness were used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure and fracture surface morphology of the joints fabricated by austenitic Stainless Steel, Ferritic Stainless Steel and duplex Stainless Steel flller metals were evaluated and the results were reported. From this investigation, it is found that the joints fabricated by duplex Stainless Steel flller metal showed higher tensile strength and hardness compared to the joints fabricated by austenitic and Ferritic Stainless Steel flller metals. Joints fabricated by austenitic Stainless Steel flller metal exhibited higher ductility and impact toughness compared with the joints fabricated by Ferritic Stainless Steel and duplex Stainless Steel flller metals.

  • Fatigue Crack Growth Behavior of Gas Metal Arc Welded AISI 409 Grade Ferritic Stainless Steel Joints
    Journal of Materials Engineering and Performance, 2009
    Co-Authors: A.k. Lakshminarayanan, K. Shanmugam, V Balasubramanian
    Abstract:

    The effect of filler metals such as austenitic Stainless Steel, Ferritic Stainless Steel, and duplex Stainless Steel on fatigue crack growth behavior of the gas metal arc welded Ferritic Stainless Steel joints was investigated. Rolled plates of 4 mm thickness were used as the base material for preparing single ‘V’ butt welded joints. Center cracked tensile specimens were prepared to evaluate fatigue crack growth behavior. Servo hydraulic controlled fatigue testing machine with a capacity of 100 kN was used to evaluate the fatigue crack growth behavior of the welded joints. From this investigation, it was found that the joints fabricated by duplex Stainless Steel filler metal showed superior fatigue crack growth resistance compared to the joints fabricated by austenitic and Ferritic Stainless Steel filler metals. Higher yield strength and relatively higher toughness may be the reasons for superior fatigue performance of the joints fabricated by duplex Stainless Steel filler metal.

  • Effect of Autogenous Arc Welding Processes on Tensile and Impact Properties of Ferritic Stainless Steel Joints
    Journal of Iron and Steel Research International, 2009
    Co-Authors: A.k. Lakshminarayanan, K. Shanmugam, V Balasubramanian
    Abstract:

    The effect of autogeneous arc welding processes on tensile and impact properties of Ferritic Stainless Steel conformed to AISI 409M grade is studied. Rolled plates of 4 mm thickness have been used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure, and fracture surface morphology of continuous current gas tungsten arc welding (CCGTAW), pulsed current gas tungsten arc welding (PCGTAW), and plasma arc welding (PAW) joints are evaluated and the results are compared. It is found that the PAW joints of Ferritic Stainless Steel show superior tensile and impact properties when compared with CCGTAW and PCGTAW joints, and this is mainly due to lower heat input, finer fusion zone grain diameter, and higher fusion zone hardness.

K. Shanmugam - One of the best experts on this subject based on the ideXlab platform.

  • Tensile and Impact Properties of Shielded Metal Arc Welded AISI 409M Ferritic Stainless Steel Joints
    Journal of Materials Science & Technology, 2009
    Co-Authors: K. Shanmugam, A.k. Lakshminarayanan, V Balasubramanian
    Abstract:

    The present study is concerned with the efiect of flller metals such as austenitic Stainless Steel, Ferritic Stainless Steel and duplex Stainless Steel on tensile and impact properties of the Ferritic Stainless Steel conforming to AISI 409M grade. Rolled plates of 4 mm thickness were used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure and fracture surface morphology of the joints fabricated by austenitic Stainless Steel, Ferritic Stainless Steel and duplex Stainless Steel flller metals were evaluated and the results were reported. From this investigation, it is found that the joints fabricated by duplex Stainless Steel flller metal showed higher tensile strength and hardness compared to the joints fabricated by austenitic and Ferritic Stainless Steel flller metals. Joints fabricated by austenitic Stainless Steel flller metal exhibited higher ductility and impact toughness compared with the joints fabricated by Ferritic Stainless Steel and duplex Stainless Steel flller metals.

  • Fatigue Crack Growth Behavior of Gas Metal Arc Welded AISI 409 Grade Ferritic Stainless Steel Joints
    Journal of Materials Engineering and Performance, 2009
    Co-Authors: A.k. Lakshminarayanan, K. Shanmugam, V Balasubramanian
    Abstract:

    The effect of filler metals such as austenitic Stainless Steel, Ferritic Stainless Steel, and duplex Stainless Steel on fatigue crack growth behavior of the gas metal arc welded Ferritic Stainless Steel joints was investigated. Rolled plates of 4 mm thickness were used as the base material for preparing single ‘V’ butt welded joints. Center cracked tensile specimens were prepared to evaluate fatigue crack growth behavior. Servo hydraulic controlled fatigue testing machine with a capacity of 100 kN was used to evaluate the fatigue crack growth behavior of the welded joints. From this investigation, it was found that the joints fabricated by duplex Stainless Steel filler metal showed superior fatigue crack growth resistance compared to the joints fabricated by austenitic and Ferritic Stainless Steel filler metals. Higher yield strength and relatively higher toughness may be the reasons for superior fatigue performance of the joints fabricated by duplex Stainless Steel filler metal.

  • Effect of Autogenous Arc Welding Processes on Tensile and Impact Properties of Ferritic Stainless Steel Joints
    Journal of Iron and Steel Research International, 2009
    Co-Authors: A.k. Lakshminarayanan, K. Shanmugam, V Balasubramanian
    Abstract:

    The effect of autogeneous arc welding processes on tensile and impact properties of Ferritic Stainless Steel conformed to AISI 409M grade is studied. Rolled plates of 4 mm thickness have been used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure, and fracture surface morphology of continuous current gas tungsten arc welding (CCGTAW), pulsed current gas tungsten arc welding (PCGTAW), and plasma arc welding (PAW) joints are evaluated and the results are compared. It is found that the PAW joints of Ferritic Stainless Steel show superior tensile and impact properties when compared with CCGTAW and PCGTAW joints, and this is mainly due to lower heat input, finer fusion zone grain diameter, and higher fusion zone hardness.

Zhenguo Yang - One of the best experts on this subject based on the ideXlab platform.

  • thermal growth and performance of manganese cobaltite spinel protection layers on Ferritic Stainless Steel sofc interconnects
    Journal of The Electrochemical Society, 2005
    Co-Authors: Zhenguo Yang, Guanguang Xia, Steven P Simner, Jeffry W Stevenson
    Abstract:

    To protect solid oxide fuel cells (SOFCs) from chromium poisoning and improve metallic interconnect stability, manganese cobaltite spinel protection layers with a nominal composition of Mn 1 . 5 Co 1 . 5 O 4 were thermally grown on Crofer22 APU, a Ferritic Stainless Steel. Thermal, electrical, and electrochemical investigations indicated that the spinel protection layers not only significantly decreased the contact area specific resistance (ASR) between a LSF cathode and the Stainless Steel interconnect, but also inhibited the subscale growth on the Stainless Steel by acting as a barrier to the inward diffusion of oxygen. A long-term thermal cycling test demonstrated excellent structural and thermomechanical stability of these spinel protection layers, which also acted as a barrier to outward chromium cation diffusion to the interconnect surface. The reduction in the contact ASR and prevention of Cr migration achieved by application of the spinel protection layers on the cathode side of Ferritic Stainless Steel interconnects resulted in improved stability and electrochemical performance of SOFCs.

  • chemical compatibility of barium calcium aluminosilicate based sealing glasses with the Ferritic Stainless Steel interconnect in sofcs
    Journal of The Electrochemical Society, 2003
    Co-Authors: Zhenguo Yang, Kerry D Meinhardt, Jeff W Stevenson
    Abstract:

    In most planar SOFC stack designs, the interconnect, which is typically made from a Ferritic Stainless Steel, is hermitically sealed to the ceramic PEN (Positive electrode-Electrolyte-Negative electrode) by a sealing glass. To maintain the structural stability and minimize degradation of the stack performance, the sealing glass must be chemically compatible with the Stainless Steel interconnect. In this study, a barium-calcium-aluminosilicate (BCAS) based glass-ceramic, specifically developed as a sealant in SOFC stacks, and a Ferritic Stainless Steel (446) were selected as examples to increase the understanding the chemical compatibility issues in SOFC. Evaluation of the interfaces of coupon joints indicated that interactions between the BCAS glass-ceramic and the Ferritic Stainless Steel was dependent on the exposure conditions. At the edges of joints, where oxygen or air was accessible, the interaction often led to the formation of BaCrO4, while in the interior of the joints, chromium or chromia dissolved into the glass to form a thin layer of chromium rich solid solution. It was also found that, in the interior of the joints, the interaction often resulted in the formation of pores aligned along the interface. It appears the pore formation along the interface can be avoided through a pre-heat treatment.

Jian Han - One of the best experts on this subject based on the ideXlab platform.

  • effects of processing optimisation on microstructure texture grain boundary and mechanical properties of fe 17cr Ferritic Stainless Steel thick plates
    Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2014
    Co-Authors: Jian Han, Zhixiong Zhu, Laizhu Jiang
    Abstract:

    Abstract The relationships between microstructure, texture, grain boundary and tensile strength, Charpy impact toughness of (Nb+Ti+V) stabilised Fe–17Cr Ferritic Stainless Steel thick plates were investigated by means of optical microscopy, X-ray diffraction, scanning electron microscopy, electron backscatter diffraction, tensile and Charpy impact testing. The results show that for Fe–17Cr Ferritic Stainless Steel thick plate, the addition of warm rolling procedure leads to refinement of grain size, modification of texture, and then optimisation of grain boundary, including grain boundary character distribution and grain boundary connectivity. Meanwhile, the mechanical testing results indicate that optimal transformation that warm rolling procedure brings to Fe–17Cr Ferritic Steel thick plate is beneficial to its mechanical properties.

  • Effect of Different Welding Parameters on the Microstructure of 21% Cr Ferritic Stainless Steel
    Advanced Materials Research, 2012
    Co-Authors: Rui Feng Han, Jun Qi Shen, Jian Han
    Abstract:

    Ferritic Stainless Steel is an economical Stainless Steel which doesn’t contain nickel or a little nickel. It has the broad prospects of application. By using 21% Cr Ferritic Stainless Steel as test material, the paper analyses the microstructure of the joint. The different welding parameters have the different effect on the depth, the solidification form and the microstructure.