University of Science and Technology Beijing - School of Materials Science and Engineering
Date Written: May 27, 2019
Abstract
Under medium (1 s-1, 10 s-1, 100 s-1) and high (500 s-1, 700 s-1, 800 s-1, 1000 s-1) strain rates, deformation coordination mechanism of 1200 MPa grade martensitic-ferrite dual-phase steel is completely opposite to that under quasi static or low strain rate (10-4-1 s-1). When the strain rate exceeds about 700 s-1, the harder phase (martensite) replaces the softer phase (ferrite) as prior deformation phase, and coordination effect of M/F (martensite/ferrite) interface is failed. As strain rate further increases, martensitic deformation amount increase dramatically. When martensitic deformation amount reaches saturation under about 1000 s-1, ferritic deformation amount restarts to increase.
Li, Yi and Song, Renbo and Wen, Erding and Zhang, Leifeng and Zhao, Zhiyang and Cai, Changhong and Zhang, Yingchao and Zhao, Chao and Yu, Ping and Quan, Shuyi, Deformation Coordination Mechanism of Dual-Phase Structure Steel Based on Martensite-Ferrite Under Medium-High Strain Rate (May 27, 2019). Available at SSRN: https://ssrn.com/abstract=3394586 or http://dx.doi.org/10.2139/ssrn.3394586
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