Microstructures and Tensile Deformation Behavior of a Cryogenic-rolled Mn-Al TRIP Steel
In this work,acryogenic rolling process was appliedto a 3Mn-1.5Al TRIP steel.Microstructure characterization was carried out by means of optical microscope,scanning electron microscope(SEM)equipped with electron probe microanalysis(EPMA)and transmission electron microscope(TEM).Mechanical properties were obtained by uniaxial tension tests.The microstructure characterization results show that the steel presents a complex microstructure composed of three phases(ferrite,martensite and retained austenite).The volume fractions of austenite before and after a deformation were determined by X-ray diffraction(XRD).The XRD results indicate that the amount of retained austenite reaches up to 18vol%and the TRIP effect occurs quite apparently in the specimen with optimizingintercritical annealing temperature of 730°C.The mechanical properties results displays that the tested steel presentsadequateultimate tensile strength of 916MPa and excellent elongation of 30%in the optimal intercriticalannealing temperature.The retained austenite strain hardening behavior(continuous TRIP effect)is observed in the steel.The outstanding combination of strength and ductility with the product of strength and elongation(PSE)reaching up to 27GPa%around indicates that the steel has a bright application prospect.
cryogenic rolling Mn-Al TRIP steel microstructures and properties retained austenite
Hu Zhiping Xu Yunbo Tan Xiaodong Yang Xiaolong Peng Fei Yu Yongmei Liu Hui Wang Le
The State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang,China School of Mechanical Engineering,Shenyang University of chemical technology,Shenyang Economical & Te Research Institute of Iron and Steel of Shandong Iron and Steel Group,Jinan,Shandong 250101,China
国内会议
上海
英文
1-6
2015-10-21（万方平台首次上网日期，不代表论文的发表时间）