Anisotropy and roughness of the solid-liquid interface of BCC Fe

Verfasser / Beitragende:
[Yongli Sun, Yongquan Wu, Xiuming Lu, Rong Li, Junjiang Xiao]
Ort, Verlag, Jahr:
2015
Enthalten in:
Journal of Molecular Modeling, 21/2(2015-02-01), 1-11
Format:
Artikel (online)
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024 7 0 |a 10.1007/s00894-015-2569-5  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s00894-015-2569-5 
245 0 0 |a Anisotropy and roughness of the solid-liquid interface of BCC Fe  |h [Elektronische Daten]  |c [Yongli Sun, Yongquan Wu, Xiuming Lu, Rong Li, Junjiang Xiao] 
520 3 |a Melting point T m and kinetic coefficient μ (a proportional constant between the interfacial velocity ν and undercooling ΔT), along with the structural roughness of the solid-liquid interface for body centered cubic (BCC) Fe were calculated by molecular dynamics (MD) simulation. All simulations applied the Sutton-Chen potential, and adopted average bond orientational order (ABOO) parameters together with Voronoi polyhedron method to characterize atomic structure and calculate atomic volume. Anisotropy of T m was found through about 20~40K decreasing from [100] to [110] and continuously to [111]. Anisotropy of μ with three low index orientations was found as: μ s,[100] > > μ s,[110] > μ s,[111] for solidifying process and μ m,[100] > > μ m,[111] > μ m,[110] for melting process. Slight asymmetry between melting and solidifying was discovered from that the ratios of μ m/μ s are all slightly larger than 1. To explain these, interfacial roughness R int and area ratio S/S 0 (ratio of realistic interfacial area S and the ideal flat cross-sectional area S 0) were defined to verify the anisotropy of interfacial roughness under different supercoolings/superheatings. The results indicated interfacial roughness anisotropies were approximately [100] > [111] > [110]; the interface in melting process is rougher than that in solidifying process; asymmetry of interfacial roughness was larger when temperature deviation ΔT was larger. Anisotropy and asymmetry of interfacial roughness fitted the case of kinetic coefficient μ very well, which could give some explanations to the anisotropies of T m and μ. 
540 |a Springer-Verlag Berlin Heidelberg, 2015 
690 7 |a Anisotropy  |2 nationallicence 
690 7 |a Interfacial roughness  |2 nationallicence 
690 7 |a Kinetic coefficient  |2 nationallicence 
690 7 |a Molecular dynamics simulation  |2 nationallicence 
690 7 |a Solid-liquid interface  |2 nationallicence 
700 1 |a Sun  |D Yongli  |u Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Yanchang Road 149, 200072, Shanghai, Zhabei District, China  |4 aut 
700 1 |a Wu  |D Yongquan  |u Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Yanchang Road 149, 200072, Shanghai, Zhabei District, China  |4 aut 
700 1 |a Lu  |D Xiuming  |u Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Yanchang Road 149, 200072, Shanghai, Zhabei District, China  |4 aut 
700 1 |a Li  |D Rong  |u Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Yanchang Road 149, 200072, Shanghai, Zhabei District, China  |4 aut 
700 1 |a Xiao  |D Junjiang  |u Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Yanchang Road 149, 200072, Shanghai, Zhabei District, China  |4 aut 
773 0 |t Journal of Molecular Modeling  |d Springer Berlin Heidelberg  |g 21/2(2015-02-01), 1-11  |x 1610-2940  |q 21:2<1  |1 2015  |2 21  |o 894 
856 4 0 |u https://doi.org/10.1007/s00894-015-2569-5  |q text/html  |z Onlinezugriff via DOI 
898 |a BK010053  |b XK010053  |c XK010000 
900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s00894-015-2569-5  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Sun  |D Yongli  |u Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Yanchang Road 149, 200072, Shanghai, Zhabei District, China  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Wu  |D Yongquan  |u Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Yanchang Road 149, 200072, Shanghai, Zhabei District, China  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Lu  |D Xiuming  |u Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Yanchang Road 149, 200072, Shanghai, Zhabei District, China  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Li  |D Rong  |u Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Yanchang Road 149, 200072, Shanghai, Zhabei District, China  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Xiao  |D Junjiang  |u Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Yanchang Road 149, 200072, Shanghai, Zhabei District, China  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Journal of Molecular Modeling  |d Springer Berlin Heidelberg  |g 21/2(2015-02-01), 1-11  |x 1610-2940  |q 21:2<1  |1 2015  |2 21  |o 894