Fe-20Mn-3Si-3Al钢在不同变形条件下的力学行为  

Mechanical Behavior of Fe-20Mn-3Si-3Al Steel Deformed Under Various Conditions

作　　者：申勇峰[1] 张荣兴[1] 魏鑫[1] 薛文颖[2] 

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,辽宁沈阳110004 [2]东北大学热连轧及轧制自动化国家重点实验室,辽宁沈阳110004

出　　处：《物理测试》2013年第4期1-6,共6页Physics Examination and Testing

基　　金：国家科技支撑计划项目(2011BAE13B03);中央高校自然基金种子项目(N100702001;N090202001)

摘　　要：通过单向拉伸试验研究了Fe-20Mn-3Si-3Al-0.045CTWIP钢在不同变形量、不同应变速率及不同变形温度下的力学性能。结果表明:当变形量为10%,时试验钢具有较好的综合力学性能,其屈服强度达到770MPa,抗拉强度为1 360MPa,断后伸长率为30%。室温变形条件下,当应变速率为1×10-4s-1时,热轧态样品的屈服强度和抗拉强度分别为510MPa及860MPa,拉伸伸长率为58%;当应变速率增加为1×10-1s-1时,其屈服强度及抗拉强度分别增至630MPa和970MPa,伸长率则下降为39%;随着变形温度的上升,材料的伸长率及抗拉强度均下降。增加变形温度至300℃时,该材料在应变速率为1×10-1s-1变形的抗拉强度降为764MPa,拉伸伸长率下降为25%。The tensile tests were carried out to explore the mechanical properties of Fe-20Mn-3Si-3A1-0. 045C TWIP steel with different cold rolling reductions. Moreover, the deformation behaviors were also investigated at extensive temperature and various strain rates. The results showed that the steel exhibited attractive mechanical properties when cold rolling reduction was about 10%. The tensile strength of the steel with a rolling reduction of 10% is as high as 1 360 MPa, and the yield strength is about 770 MPa, while the elongation reaches 30%. For instance, the yield stress and tensile stress of the steel are 510 MPa and 860 MPa while the ductility reaches 58% at a strain rate of 1 X 10-4 s-1 at room temperature. However, with increasing strain rate up to 1 10-1 s- , the yield stress goes up to 630 MPa and the tensile stress is as high as 970 MPa, in spite of a ductility of 39. The mechanical proper- ties of the steel become poor with increasing temperature. At 300 C, the tensile stress of the steel decreases to 764 MPa and the strain decreases to 25% at a strain rate of 1X 10-1 s-1.

关 键 词：孪晶诱发塑性钢 应变速率 温度 变形机制 

分 类 号：TG142.15[一般工业技术—材料科学与工程]