Effect of aging on microstructure and mechanical property of 1900 MPa grade maraging stainless steel

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	Effect of aging on microstructure and mechanical property of 1900 MPa grade maraging stainless steel
	K. Liu; Y. Y. Shan; Z. Y. Yang; J. X. Liang; L. Lu; K. Yang
	2007
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	23 期号:3 页码:312-318
摘要	The 18%Ni alloy steels provide high strength and toughness, while age-hardenable or PH stainless steels also have good corrosion resistance. This paper focuses on an investigation of the heat treatment, mechanical properties and microstructural development of a new maraging stainless steel. It is reported that the heat treatment process should consist of solution treatment and cryogenic cooling to attain a fully martensitic structure, followed by aging at 813 K. This heat treatment resulted in an ultimate tensile strength of over 1900 MPa combined with good impact toughness. Transmission electron microscopy is used to show that, for the peak-aged condition (813 K/4 h), nano-sized precipitates, e.g. Ni(3)Mo and/or R-phase, and a high density of dislocations were uniformly dispersed in the lath martensite matrix. The calculated yield strength, based on a revised Orowan mechanism, is in good agreement with the test data. The steel studied has an ultimate tensile strength over 1900 MPa, excellent fracture toughness, and good resistance against over-aging and relatively good corrosion resistance as well.
部门归属	chinese acad sci, inst met res, shenyang 110016, peoples r china. chinese acad sci, grad sch, beijing 100039, peoples r china. gen res inst iron & steel, beijing 100081, peoples r china. dongbei special steel grp co, tech ctr, fushun 113001, peoples r china.;yang, k (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;kyang@imr.ac.cn
关键词	Maraging Stainless Steels Precipitation High Strength Steels Aging Treatment Precipitation Reactions Phase Chemistry Quasi-crystalline Heat-treatment Grain-size Strength Nickel Temperature Aermet-100 Behavior
URL	查看原文
WOS记录号	WOS:000247220600005
引用统计	被引频次：19[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/321006/33710
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	K. Liu,Y. Y. Shan,Z. Y. Yang,et al. Effect of aging on microstructure and mechanical property of 1900 MPa grade maraging stainless steel[J]. Journal of Materials Science & Technology,2007,23(3):312-318.
APA	K. Liu,Y. Y. Shan,Z. Y. Yang,J. X. Liang,L. Lu,&K. Yang.(2007).Effect of aging on microstructure and mechanical property of 1900 MPa grade maraging stainless steel.Journal of Materials Science & Technology,23(3),312-318.
MLA	K. Liu,et al."Effect of aging on microstructure and mechanical property of 1900 MPa grade maraging stainless steel".Journal of Materials Science & Technology 23.3(2007):312-318.