Microstructures and mechanical properties of Si-Al-Mn TRIP steel with niobium

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	Microstructures and mechanical properties of Si-Al-Mn TRIP steel with niobium
其他题名	Microstructures and Mechanical Properties of Si-Al-Mn TRIP Steel with Niobium
	Tang Zhengyou; Ding Hua; Du Linxiu; Li Long
	2007
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	23 期号:6 页码:790-794
摘要	Microstructure consisting of ferrite, bainite and retained austenite can be obtained through intercritical annealing and isothermal treatment in bainite transformation region for low silicon TRIP (transformation induced plasticity) steel containing niobium. Effects of strain rate, Nb content and soaking temperature in bainite region on microstructure and mechanical properties of test steels were investigated. It is shown that as strain rate ranges from 10(-2) to 10(-4) s(-1), the volume fraction of transformed martensite from retained austenite, as well as tensile strength, elongation rate and strength-ductility product, increases. When Nb is added, the volume fraction of retained austenite decreases, but tensile strength and yield strength increase. While Nb content reaches 0.014%, the steel exhibits high elongation and combination of strength and ductility. Higher retained austenite volume fraction and good mechanical properties are obtained in the test steels when the soaking temperature in bainite region is 400 degrees C. The maximum values of tensile strength, total elongation rate and strength-ductility product can reach 739 MPa, 38% and 28082 MPa%, respectively.
其他摘要	Microstructure consisting of ferrite, bainite and retained austenite can be obtained through intercritical annealing and isothermal treatment in bainite transformation region for low silicon TRIP (transformation induced plasticity) steel containing niobium. Effects of strain rate, Nb content and soaking temperature in bainite region on microstructure and mechanical properties of test steels were investigated. It is shown that as strain rate ranges from 10-2 to 10-4 s-1, the volume fraction of transformed martensite from retained austenite,as well as tensile strength, elongation rate and strength-ductility product, increases. When Nb is added, the volume fraction of retained austenite decreases, but tensile strength and yield strength increase. While Nb content reaches 0.014%, the steel exhibits high elongation and combination of strength and ductility. Higher retained austenite volume fraction and good mechanical properties are obtained in the test steels when the soaking temperature in bainite region is 400℃. The maximum values of tensile strength, total elongation rate and strength-ductility product can reach 739 MPa, 38% and 28082 MPa%, respectively.
关键词	TRANSFORMATION-INDUCED PLASTICITY DUAL-PHASE STEEL RETAINED AUSTENITE ALLOYING ELEMENTS SHEET DEFORMATION FORMABILITY DUCTILITY TRIP strain rate niobium content retained austenite mechanical properties
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:3192741
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/151286
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Tang Zhengyou,Ding Hua,Du Linxiu,et al. Microstructures and mechanical properties of Si-Al-Mn TRIP steel with niobium[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2007,23(6):790-794.
APA	Tang Zhengyou,Ding Hua,Du Linxiu,&Li Long.(2007).Microstructures and mechanical properties of Si-Al-Mn TRIP steel with niobium.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,23(6),790-794.
MLA	Tang Zhengyou,et al."Microstructures and mechanical properties of Si-Al-Mn TRIP steel with niobium".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 23.6(2007):790-794.