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http://dx.doi.org/10.5228/KSPP.2005.14.4.319

Molecular Dynamics Simulation of Nano-Deformation Behavior of the Grain-Size Controlled Rheology Material  

Kim J. W. (부산대 정밀기계공학과)
Youn S. W. (부산대 정밀기계공학과)
Kang C. G. (부산대 기계공학부)
Publication Information
Transactions of Materials Processing / v.14, no.4, 2005 , pp. 319-326 More about this Journal
Abstract
In this study, the nano-deformation behavior of semi-solid Al-Si alloy was investigated using a molecular dynamics simulation as a part of the research on the surface crack behavior in thixoformed automobile parts. The microstructure of the grain-size controlled Al-Si alloy consists of primary and eutectic regions. In eutectic regions the crack initiation begins with initial fracture of the eutectic silicon particles and inside other intermetallic phases. Nano-deformation characteristics in the eutectic and primary phase of the grain-size controlled Al-Si alloy were investigated through the molecular dynamics simulation. The primary phase was assumed to be single crystal aluminum. It was shown that the vacancy occurred at the zone where silicon molecules were.
Keywords
Molecular Dynamics Simulation; Nanoindentation; Grain-size Controlled Al-Si Alloy; Two Phases;
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1 김찬일, 양승한, 김영석, 2003, 분자동력학을 이용한 나노 재료의 변형거동 전산모사, 한국소성가공학회지, 제 12 권, 제 3 호, p. 171
2 R. Komanduri, N. Chandrasekaran, L. M. Raff, 2000, M. D. Simulation of nanometric cutting of single crystal aluminium-effect of crystal orientation and direction of cutting, Wear, Vol. 242, p.60   DOI   ScienceOn
3 N. Chandrasekaran, A. Noori-Khajavi, L. M. Raff, R. Komanduri, 1998, A new method for molecular dynamics simulation of nanometric cutting, Philos. Mag. B Vol. 77, p. 7   DOI   ScienceOn
4 K. Maekawa, A. Itoh, 1995, Friction and tool wear in nano-scale machining - a molecular dynamics approach, Wear, Vol. 188, p. 115   DOI   ScienceOn
5 D. K. Choi, J. W. Kim, 1998, Calculation of stress intensity factors using three-dimensional molecular dynamics simulation, Met. & Mater., Vol. 4, p. 920   DOI
6 문찬홍, 김정두, 1994, 분자동력학을 이용한 공구형상에 따른 미소절삭현상에 관한 연구, 한국정밀공학회 1994년 추계학술대회논문집, p.83
7 M. Week, H. Kunzmann, 1994, Ultraprecision in manufacturing engineering, Proc. of the 3rd lnt. Conf. on Ultraprecision in Manufacturing Eng., Achen, Germany, p. 21
8 C. H. Caceres, J. R. Griffiths, 1996, Damage by the cracking of silicon particles in an AI-7Si-0.4Mg casting alloy, Acta Mater., Vol.44, p. 25   DOI   ScienceOn
9 E. Cerri, S. Nenna, 2003, Evaluation of damage after straining in a heat treated thixofrmed aluminium alloy, Materials Science and Engineering A, VoI.355, p.160   DOI   ScienceOn
10 최덕기, 2002, 분자 동역학을 이용한 재료 거동 해석, 전산구조공학, 제 15 권 제 3 호, p. 5
11 B. W. Dodson, 1990, Molecular dynamics modeling of vapor-phase and very-low-energy ion-beam crystal growth processes, Solid State Mater. Sci. Vol. 16, p. 115   DOI
12 S. N. Luo, T. Cagin, A. Strachan, W. A. Goddard III, T. J. Ahrens, 2002, molecular dynamics modeling of stishovite, Earth and Planetary Science Letters, Vol. 202, p. 147   DOI   ScienceOn
13 U. Landman, W. Luedthe, N. Burnham, R. Colton, 1990, Atomistic mechanism and dynamics of adhesion, nano-indentation and fracture, Science, Vol. 248, p. 454   DOI   ScienceOn
14 김동언, 손영기, 임성한, 오수익, 2003, 분자동력학을 이용한 나노 인덴테이션과 상변화 해석 연구, 한국소성가공학회 2003 년도 추계학술대회 논문집, p 339
15 X. Chang, M. Perry, J. Peploski, D. Thompson, L. Raff, 1993, Theoretical studies of hydrogenabstraction reactions from diamond and diamondlike surfaces, J. Chem. Phys., Vol.99, p. 4748.   DOI   ScienceOn