Generalized stacking fault energy of gamma-Fe

IMR OpenIR

	Generalized stacking fault energy of gamma-Fe
	Li, Wei; Lu, Song; Hu, Qing-Miao; Johansson, Borje; Kwon, Se Kyun; Grehk, Mikael; Johnsson, Jan Y.; Vitos, Levente; songlu@kth.se
	2016
发表期刊	PHILOSOPHICAL MAGAZINE
ISSN	1478-6435
卷号	96 期号:6 页码:524-541
摘要	We investigate the generalized stacking fault energy ( [GRAPHICS] -surface) of paramagnetic [GRAPHICS] -Fe as a function of temperature. At static condition, the face-centred cubic (fcc) lattice is thermodynamically unstable with respect to the hexagonal close-packed lattice, resulting in a negative intrinsic stacking fault energy (ISF). However, the unstable stacking fault energy (USF), representing the energy barrier along the [GRAPHICS] -surface connecting the ideal fcc and the intrinsic stacking fault positions, is large and positive. The ISF is calculated to have a strong positive temperature coefficient, while the USF decreases monotonously with temperature. According to the recent plasticity theory, the overall effect of temperature is to move paramagnetic fcc Fe from the stacking fault formation regime ( [GRAPHICS] K) towards maximum twinning ( [GRAPHICS] K) and finally to a dominating full-slip regime ( [GRAPHICS] K). Our predictions are discussed in connection with the available experimental observations.
部门归属	[li, wei ; lu, song ; johansson, borje ; vitos, levente] royal inst technol, dept mat sci & engn, appl mat phys, stockholm, sweden ; [hu, qing-miao] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [johansson, borje ; vitos, levente] uppsala univ, div mat theory, dept phys & astron, uppsala, sweden ; [kwon, se kyun] pohang univ sci & technol, grad inst ferrous technol, pohang, south korea ; [grehk, mikael] ab sandvik mat technol, sandviken, sweden ; [johnsson, jan y.] outokumpu stainless ab, avesta res ctr, avesta, sweden ; [vitos, levente] inst solid state phys & opt, wigner res ctr phys, budapest, hungary
关键词	-fe Plasticity Stacking Fault Energy
资助者	Swedish Research Council; Swedish Foundation for Strategic Research; European Research Council; Chinese Scholarship Council; Hungarian Scientific Research Fund [OTKA 84078, 109570]; NSF of China [51271181, 51171187]; Chinese MoST [2014CB644001]
收录类别	sci
语种	英语
WOS记录号	WOS:000372097300001
引用统计	被引频次：34[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/321006/74863
专题	中国科学院金属研究所
通讯作者	songlu@kth.se
推荐引用方式 GB/T 7714	Li, Wei,Lu, Song,Hu, Qing-Miao,et al. Generalized stacking fault energy of gamma-Fe[J]. PHILOSOPHICAL MAGAZINE,2016,96(6):524-541.
APA	Li, Wei.,Lu, Song.,Hu, Qing-Miao.,Johansson, Borje.,Kwon, Se Kyun.,...&songlu@kth.se.(2016).Generalized stacking fault energy of gamma-Fe.PHILOSOPHICAL MAGAZINE,96(6),524-541.
MLA	Li, Wei,et al."Generalized stacking fault energy of gamma-Fe".PHILOSOPHICAL MAGAZINE 96.6(2016):524-541.