Formation mechanism of nanostructures in austenitic stainless steel during equal channel angular pressing

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	Formation mechanism of nanostructures in austenitic stainless steel during equal channel angular pressing
	C. X. Huang ; G. Yang ; B. Deng ; S. D. Wu ; S. X. Li ; Z. F. Zhang
刊名	Philosophical Magazine
	2007
卷号	87 期号:31 页码:4949-4971
关键词	severe plastic-deformation stacking-fault energy induced grain-refinement attrition treatment surface-layer zr additions strain-rate transformation evolution copper
ISSN号	1478-6435
中文摘要	An ultra-low carbon austenitic stainless steel was successfully pressed from one to eight passes by equal channel angular pressing (ECAP) at room temperature. By using X-ray diffraction, optical microscopy and transmission electron microscopy, the microstructural evolution during ECAP was investigated to reveal the formation mechanism of strain-induced nanostructures. The refinement mechanism involved the formation of shear bands and deformation twins, followed by the fragmentation of twin lamellae, as well as successive martensite transformation from parent austenitic grains with sizes ranging from microns to nanometres through the processes gamma(fcc)->epsilon(hcp)->alpha'(bcc). After pressing for eight passes, two types of nanocrystalline grains were achieved: ( a) nanocrystalline austenite with a mean grain size of similar to 31nm and (b) strain-induced nanocrystalline alpha'-martensite with a size of similar to 74nm. The formation mechanisms are discussed in terms of microstructural subdivision via deformation twinning and martensite transformation.
原文出处	://WOS:000249890900008
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/33594]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	C. X. Huang,G. Yang,B. Deng,et al. Formation mechanism of nanostructures in austenitic stainless steel during equal channel angular pressing[J]. Philosophical Magazine,2007,87(31):4949-4971.
APA	C. X. Huang,G. Yang,B. Deng,S. D. Wu,S. X. Li,&Z. F. Zhang.(2007).Formation mechanism of nanostructures in austenitic stainless steel during equal channel angular pressing.Philosophical Magazine,87(31),4949-4971.
MLA	C. X. Huang,et al."Formation mechanism of nanostructures in austenitic stainless steel during equal channel angular pressing".Philosophical Magazine 87.31(2007):4949-4971.