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Effects of Biaxial Tensile on the Deformation Behavior of DP590 High-strength Steel Sheet under High Strain Rate

查看全文 作　　者：[1,2]雷雨;HUANG [1,2]Shangyu;[3]孟正华;HU [1]Jianhua;ZHOU [1]Mengcheng 高影响力作者 机构地区：[1]School of Materials Science and Engineering, Wuhan University of Technology;[2]State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology;[3]School of Automotive Engineering, Wuhan University of Technology高影响力机构 出　　处：《Journal of Wuhan University of Technology(Materials Science)》索引2017年第32卷第6期,共5页高影响力期刊 基　　金：Funded by the National Natural Science Foundation of China(Nos.51205298 and 51475345);the China Postdoctoral Science Foundation(No.2014M552096);the Open Fund Project of State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology(No.P2015-01) 摘　　要：The effects of biaxial tensile pre-strain on the forming limit of DP590 high-strength steel under high strain rate were investigated. The stress-strain curves of DP590 steel sheet under the biaxial tensile of different load ratios were obtained. The forming limit diagrams(FLDs) of DP590 steel sheet under biaxial tensile pre-strain and electromagnetic hybrid forming were established. Results showed that the biaxial tensile pre-strain had significant effects on the formability of DP590 steel. The pre-strain in a certain range improved the forming limit of DP590 steel under high rate, and the forming limit increased with the pre-strain. The prestrain in the same direction of high rate increased the forming limit of the final deformation under complex strain paths conditions, but the pre-strain in the vertical direction decreased the minor strain under the high strain rate. 关 键 词：DP590 steel biaxial tensile PRE-STRAIN forming limit
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