A Study of Submicron Grain Boundary Precipitates in Ultralow Carbon 316LN Steels

IMR OpenIR

	A Study of Submicron Grain Boundary Precipitates in Ultralow Carbon 316LN Steels
	S. Downey; K. Han; P. N. Kalu; K. Yang; Z. M. Du
	2010
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	41A 期号:4 页码:881-887
摘要	This article reports our efforts in characterization of an ultralow carbon 316LN-type stainless steel. The carbon content in the material is one-third that in a conventional 316LN, which further inhibits the formation of grain boundary carbides and therefore sensitizations. Our primary effort is focused on characterization of submicron size precipitates in the materials with the electron backscatter diffraction (EBSD) technique complemented by Auger electron spectroscopy (AES). Thermodynamic calculations suggested that several precipitates, such as M(23)C(6), Chi, Sigma, and Cr(2)N, can form in a low carbon 316LN. In the steels heat treated at 973 K (700 A degrees C) for 100 hours, a combination of EBSD and AES conclusively identified the grain boundary precipitates (a parts per thousand yen100 nm) as Cr(2)N, which has a hexagonal closed-packed crystallographic structure. Increases of the nitrogen content promote formation of large size Cr(2)N precipitates. Therefore, prolonged heat treatment at relatively high temperatures of ultralow carbon 316LN steels may result in a sensitization.
部门归属	[downey, s., ii] us nucl regulatory commiss, washington, dc 20555 usa. [han, k.] natl high magnet field lab, tallahassee, fl 32310 usa. [downey, s., ii; kalu, p. n.] famu fsu coll engn, dept mech engn, tallahassee, fl 32310 usa. [yang, k.] chinese acad sci, inst met res, shenyang 110016, peoples r china. [du, z. m.] univ sci & technol beijing, dept mat sci & engn, beijing 100083, peoples r china.;han@magnet.fsu.edu
关键词	Electron Backscatter Diffraction Austenitic Stainless-steels M23c6 Carbide Microstructure Temperature Toughness Evolution
URL	查看原文
WOS记录号	WOS:000275445100015
引用统计	被引频次：10[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/321006/31079
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Downey,K. Han,P. N. Kalu,et al. A Study of Submicron Grain Boundary Precipitates in Ultralow Carbon 316LN Steels[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2010,41A(4):881-887.
APA	S. Downey,K. Han,P. N. Kalu,K. Yang,&Z. M. Du.(2010).A Study of Submicron Grain Boundary Precipitates in Ultralow Carbon 316LN Steels.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,41A(4),881-887.
MLA	S. Downey,et al."A Study of Submicron Grain Boundary Precipitates in Ultralow Carbon 316LN Steels".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 41A.4(2010):881-887.