Strength-ductility synergy in a 1.4 GPa austenitic steel with a heterogeneous lamellar microstructure  

作　　者：Gang Niu Hatem S.Zurob R.D.K.Misra Huibin Wu Yu Zou 

机构地区：[1]Department of Materials Science and Engineering,University of Toronto,Toronto,ON,M5S 3E4,Canada Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China [2]Department of Materials Science and Engineering,McMaster University,Hamilton,ON,L8S 4L7,Canada [3]Department of Metallurgical,Materials and Biomedical Engineering,University of Texas at El Paso,El Paso,TX 79968,USA [4]Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China [5]Department of Materials Science and Engineering,University of Toronto,Toronto,ON,M5S 3E4,Canada

出　　处：《Journal of Materials Science & Technology》2022年第11期133-138,共6页材料科学技术（英文版）

基　　金：the support from the National Natural Science Foundation of China (Nos.51774033 and 51474031)。

摘　　要：1.Introduction Advanced high-strength steels with good ductility are essen-tial to the manufacturing,structural safety,and light-weighting of load-bearing structures in many industries[1-3].Austenitic stain-less steel(ASS)exhibits high ductility due to the TRIP and/or TWIP effect that can alleviate stress concentration,prevent void nucle-ation,enhance work hardening,and postpone necking[4-6].The yield strength of conventional ASS is generally low(∼200-500 MPa),and their deformation resistance is insufficient for many load-bearing applications[6].Previous studies reported the in-creased yield strength in various austenitic steels through grain refinement,dislocation strengthening,precipitation strengthening,and heterogeneous hardening[7-14].A single strengthening mech-anism,however,is typically insufficient to obtain ultrahigh yield strength over 1 GPa in austenitic steel[12].

关 键 词：steel DUCTILITY AUSTENITIC 

分 类 号：TG142.1[一般工业技术—材料科学与工程]