Investigation on deformation induced ferrite (a kind of martensite) transformation above A(e3) temperature in a low carbon steel

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	Investigation on deformation induced ferrite (a kind of martensite) transformation above A(e3) temperature in a low carbon steel
	Liu, ZX; Li, DZ; Qia, GW
通讯作者	Liu, ZX(zhxliu@imr.ac.cn)
	2005-11-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	41 期号:11 页码:1127-1135
摘要	A series of unidirectional compression tests of a low carbon steel Q235 were performed on a Gleeble 3500 thermal simulator, and the influences of strain, strain rate and deformation temperature (above the isothermal transformation temperature A(e3) from austenite to ferrite) on deformation induced ferrite transformation (DIFT) have been examined. The microstructure, nanoindentation hardness and the elastic modulus of deformation induced ferrite (DIF) and proeutectoid ferrtie were determined by optical microscope, scanning electron microscope (SEM), X-ray diffraction (XRD) and nanoindentation techniques. The results show that DIFT can take place above A(e3) temperature, the higher the strain rate and the strain, the more favorable for DIFT. When epsilon=80% and (epsilon) over dot=20 s(-1), the upper limit temperature of DIFT can be elevated to 945. degrees C (A(e3)+98 degrees C). An interesting phenomenon is found that when the deformation temperature is between 870-920 degrees C, the total stress is increased with deformation temperature decreasing. However, when deformed between 830-870 degrees C, the total stress is decreased with deformation temperature decreasing. Compared with the diffraction peak of proeutectoid ferrite, the diffraction peak of DIF was shift to a low angle in XRD analysis, and both the nanoindentation hardness and elastic modulus of DIF are much higher than those of proeutectoid ferrite, which proved DIF to be a kind of martensite.
关键词	deformation induced ferrite transformation low carbon steel upper limit temperature nanoindentation
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000233702000003
出版者	SCIENCE PRESS
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/83788
专题	中国科学院金属研究所
通讯作者	Liu, ZX
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu, ZX,Li, DZ,Qia, GW. Investigation on deformation induced ferrite (a kind of martensite) transformation above A(e3) temperature in a low carbon steel[J]. ACTA METALLURGICA SINICA,2005,41(11):1127-1135.
APA	Liu, ZX,Li, DZ,&Qia, GW.(2005).Investigation on deformation induced ferrite (a kind of martensite) transformation above A(e3) temperature in a low carbon steel.ACTA METALLURGICA SINICA,41(11),1127-1135.
MLA	Liu, ZX,et al."Investigation on deformation induced ferrite (a kind of martensite) transformation above A(e3) temperature in a low carbon steel".ACTA METALLURGICA SINICA 41.11(2005):1127-1135.