Mechanical Behaviors of Ultrafine-Grained 301 Austenitic Stainless Steel Produced by Equal-Channel Angular Pressing

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	Mechanical Behaviors of Ultrafine-Grained 301 Austenitic Stainless Steel Produced by Equal-Channel Angular Pressing
	C. X. Huang; G. Yang; C. Wang; Z. F. Zhang; S. D. Wu
	2011
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	42A 期号:7 页码:2061-2071
摘要	The technique of equal-channel angular pressing (ECAP) was used to refine the microstructure of an AISI 301 austenitic stainless steel (SS). An ultrafine-grained (UFG) microstructure consisting mainly of austenite and a few martensite was achieved in 301 steel after ECAP processing for four passes at 523 K (250 A degrees C). By submitting the as-ECAP rods to annealing treatment in the temperature range from 853 K to 893 K (580 A degrees C to 620 A degrees C) for 60 minutes, fully austenitic microstructures with grain sizes of 210 to 310 nm were obtained. The uniaxial tensile tests indicated that UFG 301 austenitic SS had an excellent combination of high yield strength (> 1.0 GPa) and high elongation-to-fracture (> 30 pct). The tensile stress-strain curves exhibited distinct yielding peak followed by obvious Luders deformation. Measurements showed that Luders elongation increased with an increase in strength as well as a decrease in grain size. The microstructural changes in ultrafine austenite grains during tensile deformation were tracked by X-ray diffraction and transmission electron microscope. It was found that the strain-induced phase transformation from austenite to martensite took place soon after plastic deformation. The transformation rate with strain and the maximum strain-induced martensite were promoted significantly by ultrafine austenite grains. The enhanced martensitic transformation provided extra strain-hardening ability to sustain the propagation of Luders bands and large uniform plastic deformation. During tensile deformation, the Luders bands and martensitic transformation interacted with each other and made great contribution to the excellent mechanical properties in UFG austenitic SS.
部门归属	[huang, c. x.; zhang, z. f.; wu, s. d.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [huang, c. x.] rhein westfal th aachen, inst phys met & met phys, d-52074 aachen, germany. [yang, g.; wang, c.] cent iron & steel res inst, beijing 100081, peoples r china.;huang, cx (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china;chxhuang@imr.ac.cn
关键词	Severe Plastic-deformation Luders Band Deformation Nanostructured Materials Martensite Formation Tensile Deformation Room-temperature Aluminum-alloy Strain Ductility Nanocrystalline
URL	查看原文
WOS记录号	WOS:000291484300034
引用统计	被引频次：65[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/321006/30403
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,C. Wang,et al. Mechanical Behaviors of Ultrafine-Grained 301 Austenitic Stainless Steel Produced by Equal-Channel Angular Pressing[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2011,42A(7):2061-2071.
APA	C. X. Huang,G. Yang,C. Wang,Z. F. Zhang,&S. D. Wu.(2011).Mechanical Behaviors of Ultrafine-Grained 301 Austenitic Stainless Steel Produced by Equal-Channel Angular Pressing.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,42A(7),2061-2071.
MLA	C. X. Huang,et al."Mechanical Behaviors of Ultrafine-Grained 301 Austenitic Stainless Steel Produced by Equal-Channel Angular Pressing".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 42A.7(2011):2061-2071.