METALS AND METAL MATRIX COMPOSITES |
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Study on Morphology of Martensites Transformation Induced by Explosive Shock Loading in AISI304 Stainless Steel |
WANG Huhe1, XINBA Yaer1, LI Xiaojie2,*
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1 School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China 2 Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, Liaoning, China |
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Abstract Explosive shock loading on AISI304 stainless steel plates was experimentally carried out by explosive impact treatment. The evolution of microstructures, morphological features of martensites and its orientation of crystallography with matrix austenites in treated samples were respectively investigated by XRD, TEM and EBSD, and then martensite transformation induced by shock loading were discussed. Results showed that α martensites with a few ε martensites generated in austenite grain after explosive shock loading; α martensites were formed at deformation bands and its intersections; α martensite embryos were confined in deformation bands. Crystallographic orientations between α martensites and matrix austenite contained both K-S relation and Nishiyama relation. The ε martensites which had straight grain boundary were generated from stacking faults, and its crystallographic orientation with matrix austenite followed by relations of [110]γ∥[1120]ε and (0001)ε∥(111)γ. It can be concluded that the formations of the ε martensites are related to stacking faults, and α martensites are related to deformation bands, twins and its intersections.
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Published:
Online: 2022-05-24
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Fund:National Natural Science Foundation of China (12072067, 11672067),Independent Research Project of the State Key Laboratory of Structural Analysis of Industrial Equipment(S18314), and Scientific Research Project of Inner Mongolia University of Technology (BS2020002). |
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