Fe-30Mn-5Al TWIP钢的拉伸变形行为  

Study on Tensile Deformation Behavior of Fe-30Mn-5Al TWIP Steel

作　　者：朱雪梅[1] 梁泰贺 闫明威 ZHU Xuemei;LIANG Taihe;YAN Mingwei(School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2023年第1期103-106,共4页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金资助项目(11202128)。

摘　　要：在保证Fe-Mn-Al-Si系TWIP钢原有性能的基础上,为了消除Si对钢表面镀锌的不利影响,根据层错能计算方法以及钢的奥氏体稳定区与成分的经验解析方程,设计了Fe-30Mn-5Al单相奥氏体TWIP钢。采用万能实验机对其进行室温拉伸实验并对实验后的试样进行了背散射电子衍射分析(EBSD),研究了Fe-30Mn-5Al钢的拉伸变形行为。结果表明:Fe-30Mn-5Al奥氏体TWIP钢的层错能为50.35 mJ/m^(2),固溶后的Fe-30Mn-5Al钢,在室温拉伸过程中,形成了大量形变孪晶,抗拉强度达到800 MPa,拉伸延伸率高达100%,兼具优异的强度和塑性。In order to eliminate the adverse effect of Si on galvanized steel surface on the basis of ensuring the original performance of Fe-Mn-Al-Si TWIP steel, an Fe-30Mn-5Al single-phase austenitic TWIP steel was designed according to the calculation method of lamination fault energy and the empirical analytical equation of the austenite stability zone in the steel composition. The tensile deformation behavior of the Fe-30Mn-5Al steel was investigated by backscattered electron diffraction(EBSD) technique after room temperature tensile test on a universal testing machine. The results show that the lamination fault energy of the Fe-30Mn-5Al austenitic TWIP steel is 50.35 mJ/m^(2). During the tensile process at room temperature, a large number of deformation twins are formed in Fe-30Mn-5Al steel after solution treatment. The tensile strength is up to 800 MPa with a tensile elongation up to 100%, showing excellent strength and plasticity.

关 键 词：Fe-30Mn-5Al TWIP钢 层错能 拉伸变形行为 形变孪晶 

分 类 号：TG142.1[一般工业技术—材料科学与工程]