ALLOYING ELEMENT SEGREGATION EFFECT IN A MULTI-PHASE STRENGTHENED MARAGING STAINLESS STEEL

doi:10.11900/0412.1961.2016.00234

CORC > 金属研究所 > 中国科学院金属研究所

	ALLOYING ELEMENT SEGREGATION EFFECT IN A MULTI-PHASE STRENGTHENED MARAGING STAINLESS STEEL
	Tian Jialong 1,2; Li Yongcan 3; Wang Wei 1; Yan Wei 1; Shan Yiyin 1; Jiang Zhouhua 2; Yang Ke 1
刊名	ACTA METALLURGICA SINICA
	2016-12-12
卷号	52 期号:12 页码:1517-1526
关键词	maraging stainless steel alloying element segregation mechanical property corrosion resistance
ISSN号	0412-1961
DOI	10.11900/0412.1961.2016.00234
通讯作者	Wang Wei(wangw@imr.ac.cn)
英文摘要	Maraging stainless steels are the most widely used high strength stainless steels because of their excellent combination of high strength, superior corrosion resistance and good weldability. The typical heat treatment of maraging stainless steel consists of solution treatment and the following aging treatment. Aging treatment is the important process since it affects the steel's final properties and then determines its application prospect. Thus, understanding well the segregation behavior of alloying elements during the aging treatment plays a key role in developing the new maraging stainless steel with superior properties. In this work, segregation of alloying elements as well as its effect on mechanical properties and corrosion resistance of a multi-phase strengthened maraging stainless steel was studied by HRTEM and APT analyses. It was found that three precipitating species including Mo-rich R' phase, eta phase and Cr-rich alpha' phase were identified in the steel. A unique core-shell structure with membrane-like R' phase formed on the surface of eta phase was identified however alpha' phase distributed in the matrix separately. The core-shell structure enabled the maraging stainless steel a superior over-aging resistance and since aging time has reached 40 h, the characteristics of precipitations change little even aging time prolongs to 100 h. The corrosion test results indicated that the occurrence of alpha' phase resulted in the formation of Cr-depleted zone and deteriorated the corrosion resistance seriously. In conclusion, the segregation behavior of alloying elements in maraging stainless steel has a significant effect on both mechanical property and corrosion resistance although some underlying mechanisms still haven't been understood well.
资助项目	National Natural Science Foundation of China[51201160] ; Science and Technology Innovation Foundation from Institute of Metal Research, Chinese Academy of Sciences[2015-ZD04]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000391244600005
资助机构	National Natural Science Foundation of China ; Science and Technology Innovation Foundation from Institute of Metal Research, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/123575]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang Wei
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Northeastern Univ, Sch Met & Mat, Shenyang 110819, Peoples R China 3.Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Tian Jialong,Li Yongcan,Wang Wei,et al. ALLOYING ELEMENT SEGREGATION EFFECT IN A MULTI-PHASE STRENGTHENED MARAGING STAINLESS STEEL[J]. ACTA METALLURGICA SINICA,2016,52(12):1517-1526.
APA	Tian Jialong.,Li Yongcan.,Wang Wei.,Yan Wei.,Shan Yiyin.,...&Yang Ke.(2016).ALLOYING ELEMENT SEGREGATION EFFECT IN A MULTI-PHASE STRENGTHENED MARAGING STAINLESS STEEL.ACTA METALLURGICA SINICA,52(12),1517-1526.
MLA	Tian Jialong,et al."ALLOYING ELEMENT SEGREGATION EFFECT IN A MULTI-PHASE STRENGTHENED MARAGING STAINLESS STEEL".ACTA METALLURGICA SINICA 52.12(2016):1517-1526.