Directional Anisotropy of Crack Propagation Along Σ3 Grain Boundary in BCC Fe

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• 作者：G. Sainath ; B. K. Choudhary
• 关键词：Molecular dynamics simulation ; Crack propagation ; Σ3 grain boundary
• 刊名：Transactions of the Indian Institute of Metals
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：69
• 期：2
• 页码：525-530
• 全文大小：3,873 KB
• 参考文献：1.Wang J-S, and Anderson P M, Acta Metall Mater 39 (1991) 779.CrossRef
  2.Wang J-S, and Mesarovic Dj S, Acta Metall Mater 43 (1995) 3837.
  3.Cheng Y, Jin Z-H, Zhang Y W, and Gao H, Acta Mater 58 (2010) 2293.CrossRef
  4.Farkas D, MRS Bull 25 (2000) 35.CrossRef
  5.Yamakov V, Saether E, Phillips D R, and Glaessgen E H, J Mech Phys Solids 54 (2006) 1899.CrossRef
  6.Plimpton S J, J Comput Phys 117 (1995) 1.CrossRef
  7.Mendelev M I, Han S, Srolovitz D J, Ackland G J, Sun D Y, and Asta M, Philos Mag 83 (2003) 3977.CrossRef
  8.Sainath G, Choudhary B K, and Jayakumar T, Comp Mater Sci 104 (2015) 76.CrossRef
  9.Sainath G, and Choudhary B K, Mater Sci Eng A 640 (2015) 98.CrossRef
  10.Sainath G, and Choudhary B K, Comp Mater Sci 111 (2016) 406.
  11.Li J, Modell Simul Mater Sci Eng 11 (2003) 173.CrossRef
  12.Kelchner C L, Plimpton S J, and Hamilton J C, Phys Rev B 58 (1998) 11085.CrossRef
  13.Zimmerman J A, Webb E B, Hoyt J J, Jones R E, Klein P A, and Bammann D J, Modell Simul Mater Sci Eng 12 (2003) S319.CrossRef
  14.Rice J R, J Mech Phys Solids 40 (1992) 239.CrossRef
  15.Sinha T, and Kulkarni Y, J Appl Phys 116 (2014) 183505.CrossRef
  16.Duesbery M S, and Vitek V, Acta Mater 46 (1998) 1481.CrossRef
  17.Healy C J, and Ackland G J, Acta Mater 70 (2014) 105.CrossRef
  
• 作者单位：G. Sainath (1)
  B. K. Choudhary (1)
  
  1. Deformation and Damage Modeling Section, Mechanical Metallurgy Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, 603102, India
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Metallic Materials
  Materials Science, general
  Tribology, Corrosion and Coatings
  
• 出版者：Springer India
• ISSN：0975-1645

文摘

Crack growth behaviour along the coherent twin boundary (CTB), i.e., Σ3{112} in BCC Fe is investigated using molecular dynamics (MD) simulations. The growth of an atomistically sharp crack with {112}<110> orientation has been examined along the two opposite <111> directions of CTB under mode-I loading at a constant strain rate. Separate MD simulations were carried out with crack inserted in the left side, right side and middle of the specimen model system. The results indicate that the crack grows differently along the two opposite <111> directions. In case of a crack inserted in the left side, the crack grows in ductile manner, while it propagates in semi-brittle manner in the case of crack inserted in the right side. The directional dependence of crack growth along the CTB is also confirmed by the stress–strain behaviour. This anisotropy in crack growth behaviour has been attributed to the twinning-antitwinning asymmetry of 1/6<111> partial dislocations on {112} planes. Keywords Molecular dynamics simulation Crack propagation Σ3 grain boundary