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Effect of deformation twinning on high-temperature performance of cold-rolled S31042 steel 被引量:1

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摘要 Influence of deformation twinning on high-temperature instantaneous performance of cold-rolled S31042 steel was investigated by optical microscopy, scanning electron microscopy, transmission electron microscopy, and high-temperature tensile test. An increasing number of deformation twins have formed as the cold rolling reduction degree increases during the cold rolling process. During the tensile process at 700 ℃, M23C6 particles generated along the deformation twin boundaries, and NbCrN nanoparticles dispersedly precipitated throughout the austenite grains. For the high-temperature tensile sample subjected to cold reduction for 80%, it is observed from the fractured cross section that numerous defor-mation twin boundaries were decorated by discontinuous M23C6 particles. Therefore, austenite grains were divided into several independent zones by the deformation twins, and the grains were refined. Due to the grain refinement strengthening and precipitation strengthening, the high-temperature temporal strength of the 80% cold-rolled sample was significantly improved, and simultaneously, this sample exhibited favorable high-temperature elongation.
出处 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2019年第7期704-711,共8页
基金 The authors would like to acknowledge the National Natural Science Foundation of China (Granted Nos. 51325401, 51474156 and U1660201) the National Magnetic Confinement Fusion Energy Research Program (No. 2015GB119001) for Grant and financial support.
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