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;
AbstractWe 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.
description.department[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
Keyword-fe Plasticity Stacking Fault Energy
Funding OrganizationSwedish 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]
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WOS IDWOS:000372097300001
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Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
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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.,...& 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.
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