Enhancement of mechanical properties of heat-resistant martensitic steel processed by equal channel angular pressing

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	Enhancement of mechanical properties of heat-resistant martensitic steel processed by equal channel angular pressing
	G. Yang; C. X. Huang; C. Wang; L. Y. Zhang; C. Hu; Z. F. Zhang; S. D. Wu
	2009
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	515 期号:1-2 页码:199-206
摘要	The microstructures and tensile properties of a commercial heat-resistant martensitic steel processed by equal channel angular pressing (ECAP) for one pass and subsequent ageing treatment were investigated. Both optical and TEM examinations showed that many martensite laths had been broken into dislocation cells and subgrains after ECAP deformation. At the same time, the fragmentation of rod-shaped precipitates was also observed and the distribution of precipitation was more uniform than that in the as-received sample. After ageing in the temperature range of 640-720 degrees C for 2 h, dislocation recovery took place resulting in the decrease of dislocation density and formation of many ultrafine grains with sizes of several hundred of nanometers, and spherical particles that were uniformly dispersed in the matrix of fine subgrains/grains. By ECAP deformation and subsequent ageing treatment, a simultaneous increase in both strength and toughness was achieved, compared with those of as-received state. The enhancement of tensile properties was attributed to microstructural refinement and uniform distribution of precipitates. (C) 2009 Elsevier B.V. All rights reserved.
部门归属	[yang, g.; wang, c.; zhang, l. y.; hu, c.] cent iron & steel res inst, beijing 100081, peoples r china. [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.;yang, g (reprint author), cent iron & steel res inst, beijing 100081, peoples r china;yanggang@nercast.com chxhuang@imr.ac.cn
关键词	Heat-resistant Martensitic Steel Ecap Microstructural Refinement Nano-precipitate Tensile Strength Ductility Low-carbon-steel Severe Plastic-deformation Strain-hardening Behavior Warm Deformation Tensile Ductility Grain-refinement Alloy Microstructure Al Cu
URL	查看原文
WOS记录号	WOS:000266854500031
引用统计	被引频次：23[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/321006/32483
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. Yang,C. X. Huang,C. Wang,et al. Enhancement of mechanical properties of heat-resistant martensitic steel processed by equal channel angular pressing[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2009,515(1-2):199-206.
APA	G. Yang.,C. X. Huang.,C. Wang.,L. Y. Zhang.,C. Hu.,...&S. D. Wu.(2009).Enhancement of mechanical properties of heat-resistant martensitic steel processed by equal channel angular pressing.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,515(1-2),199-206.
MLA	G. Yang,et al."Enhancement of mechanical properties of heat-resistant martensitic steel processed by equal channel angular pressing".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 515.1-2(2009):199-206.