The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
T Venugopalan - One of the best experts on this subject based on the ideXlab platform.
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ferrite channel effect on ductility and strain hardenability of ultra high strength Dual Phase Steel
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2017Co-Authors: Ravi B Kumar, Nand Kumar Patel, Krishnendu Mukherjee, Mahesh Walunj, G K Mandal, T VenugopalanAbstract:Abstract This study describes an effect of controlled austenite decomposition on microstructure evolution in Dual Phase Steel. Steel sheets austenitized at various annealing temperatures were rapidly cooled to the inter-critical annealing temperature of 800 °C for the isothermal decomposition of austenite and then ultra fast cooled to room temperature. The scanning electron microscope analysis of evolving microstructure revealed ferrite nucleation and growth along prior austenite grain boundaries leading to ferrite network/channel formation around martensite. The extent of ferrite channel formation showed a strong dependence on the degree of undercooling in the inter-critical annealing temperature regime. Uniaxial tensile deformation of processed Steel sheets showed extensive local inter-lath martensite damage activity. Extension/propagation of these local micro cracks to neighboring martensite grains was found to be arrested by ferrite channels. This assisted in delaying the onset of global damage which could lead to necking and fracture. The results demonstrated an alternate possible way of inducing ductility and strain hardenability in ultra high strength Dual Phase Steels.
Bilge Demir - One of the best experts on this subject based on the ideXlab platform.
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an investigation of mechanical and metallurgical properties of explosive welded aluminum Dual Phase Steel
Materials Letters, 2008Co-Authors: Mustafa Acarer, Bilge DemirAbstract:Abstract The aim of this paper is investigation of microstructure and property relationship in aluminum–HSLA Steel and aluminum–Dual Phase Steel bimetals fabricated by explosive welding technique. Dual Phase Steel was produced by intercritical annealing and water quenching from 1.45Mn–0.2Si–0.186C HSLA Steel. Hardness, tensile shear strength, tensile strength, toughness and microstructure of explosively welded aluminum–HSLA Steel and aluminum–Dual Phase Steel were evaluated. Both bimetals have a straight bonding interface. It was also seen that plastic deformation of Dual Phase Steel was higher than HSLA Steel near interfaces of bimetals. The hardness was increased near the bond interface of bimetals. Tensile and tensile shear strength tests showed that aluminum–Dual Phase Steel is superior than aluminum–HSLA Steel. Also, impact toughness of aluminum–Dual Phase Steel was found significantly higher than that of aluminum–HSLA Steel.
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An investigation of mechanical and metallurgical properties of explosive welded aluminum–Dual Phase Steel
Materials Letters, 2008Co-Authors: Mustafa Acarer, Bilge DemirAbstract:Abstract The aim of this paper is investigation of microstructure and property relationship in aluminum–HSLA Steel and aluminum–Dual Phase Steel bimetals fabricated by explosive welding technique. Dual Phase Steel was produced by intercritical annealing and water quenching from 1.45Mn–0.2Si–0.186C HSLA Steel. Hardness, tensile shear strength, tensile strength, toughness and microstructure of explosively welded aluminum–HSLA Steel and aluminum–Dual Phase Steel were evaluated. Both bimetals have a straight bonding interface. It was also seen that plastic deformation of Dual Phase Steel was higher than HSLA Steel near interfaces of bimetals. The hardness was increased near the bond interface of bimetals. Tensile and tensile shear strength tests showed that aluminum–Dual Phase Steel is superior than aluminum–HSLA Steel. Also, impact toughness of aluminum–Dual Phase Steel was found significantly higher than that of aluminum–HSLA Steel.
V Baltazar H Hernandez - One of the best experts on this subject based on the ideXlab platform.
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nanoindentation and microstructure analysis of resistance spot welded Dual Phase Steel
Materials Letters, 2010Co-Authors: V Baltazar H Hernandez, Sushanta Kumar Panda, M L Kuntz, Y ZhouAbstract:Abstract A nanoindentation hardness study has been conducted on the tempered region and the base metal in a Dual Phase Steel subjected to rapid thermal cycles of resistance spot welding. Nanohardness results revealed “softening” at nano-scale for tempered martensite when compared to martensite in the base metal. At the tempered region, the ferritic matrix presented a slight reduction in hardness while the tempered martensite seemed to have a major contribution to the measured softening at micro-scale.
Hongxing Zheng - One of the best experts on this subject based on the ideXlab platform.
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high efficiency fast heating annealing of a cold rolled Dual Phase Steel
Materials & Design, 2014Co-Authors: Qingge Meng, Jun Li, Hongxing ZhengAbstract:Abstract In the present work, fast-heating annealing was performed on a cold-rolled Fe–0.07C–1.7Mn–0.429Si Dual-Phase Steel. In contrast to commercial conventional continuous annealed Steel, 6.6% higher ultimate tensile strength and 14.1% greater elongation were obtained. Transmission electron microscopy observations reveal the incomplete ferrite recrystallization, the formation of bainite and fine fiber-like martensite in fast-heating processed Dual-Phase Steel. High-efficiency simplified fast-heating annealing process demonstrates great potential for large-scale production.
Ravi B Kumar - One of the best experts on this subject based on the ideXlab platform.
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ferrite channel effect on ductility and strain hardenability of ultra high strength Dual Phase Steel
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2017Co-Authors: Ravi B Kumar, Nand Kumar Patel, Krishnendu Mukherjee, Mahesh Walunj, G K Mandal, T VenugopalanAbstract:Abstract This study describes an effect of controlled austenite decomposition on microstructure evolution in Dual Phase Steel. Steel sheets austenitized at various annealing temperatures were rapidly cooled to the inter-critical annealing temperature of 800 °C for the isothermal decomposition of austenite and then ultra fast cooled to room temperature. The scanning electron microscope analysis of evolving microstructure revealed ferrite nucleation and growth along prior austenite grain boundaries leading to ferrite network/channel formation around martensite. The extent of ferrite channel formation showed a strong dependence on the degree of undercooling in the inter-critical annealing temperature regime. Uniaxial tensile deformation of processed Steel sheets showed extensive local inter-lath martensite damage activity. Extension/propagation of these local micro cracks to neighboring martensite grains was found to be arrested by ferrite channels. This assisted in delaying the onset of global damage which could lead to necking and fracture. The results demonstrated an alternate possible way of inducing ductility and strain hardenability in ultra high strength Dual Phase Steels.
