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
	2007
发表期刊	Philosophical Magazine
ISSN	1478-6435
卷号	87 期号:31 页码:4949-4971
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.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. cent iron & steel res inst, beijing 100081, peoples r china.;huang, cx (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;chxhuang@imr.ac.cn zhfzhang@imr.ac.cn
关键词	Severe Plastic-deformation Stacking-fault Energy Induced Grain-refinement Attrition Treatment Surface-layer Zr Additions Strain-rate Transformation Evolution Copper
URL	查看原文
WOS记录号	WOS:000249890900008
引用统计	被引频次：38[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/321006/33594
专题	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.