Molecular dynamics simulation of nano-sized crystallization during plastic deformation in an amorphous metal

R. Tarumi, A. Ogura, Masayuki Shimojo, K. Takashima, Y. Higo

研究成果: Conference contribution

2 引用 (Scopus)

抄録

An NTP ensemble molecular dynamics simulation was carried out to investigate the mechanism of nano-sized crystallization during plastic deformation in an amorphous metal. The atomic system used in this study was Ni single component. The total number of Ni atoms was 1372. The Morse type inter-atomic potential was employed. An amorphous model was prepared by a quenching process from the liquid state. Pure shear stresses were applied to the amorphous model at a temperature of 50 K. At applied stresses of less than 2.4GPa, at a linear relation between shear stress and shear strain was observed. However, at an applied shear stress of 2.8 GPa, the amorphous model started to deform significantly until shear strain reached to 0.78. During this deformation process, phase transformation from amorphous into crystalline structure (fcc) was observed. Furthermore, an orientation relationship between shear directions and crystalline phase was obtained, that is, two shear directions are parallel to a (111) of the fcc structure. This crystallographic orientation relationship agreed well with our experimental result of Ni-P amorphous alloy. Mechanisms of phase transformation from amorphous into crystalline structure were discussed.

元の言語English
ホスト出版物のタイトルMaterials Research Society Symposium - Proceedings
編集者D. Farkas, H. Kung, M. Mayo, H. Swygenhoven, J. Weertman
634
出版物ステータスPublished - 2001
外部発表Yes
イベントStructure and Mechanical Properties of Nanophase Materials- Theory and Computer Si,ulation v.s Experiment - Boston, MA, United States
継続期間: 2000 11 282000 11 30

Other

OtherStructure and Mechanical Properties of Nanophase Materials- Theory and Computer Si,ulation v.s Experiment
United States
Boston, MA
期間00/11/2800/11/30

Fingerprint

Crystallization
Molecular dynamics
Plastic deformation
Metals
Computer simulation
Shear stress
Shear strain
Crystalline materials
Phase transitions
Amorphous alloys
Crystal orientation
Quenching
Atoms
Liquids
Temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

これを引用

Tarumi, R., Ogura, A., Shimojo, M., Takashima, K., & Higo, Y. (2001). Molecular dynamics simulation of nano-sized crystallization during plastic deformation in an amorphous metal. : D. Farkas, H. Kung, M. Mayo, H. Swygenhoven, & J. Weertman (版), Materials Research Society Symposium - Proceedings (巻 634)

Molecular dynamics simulation of nano-sized crystallization during plastic deformation in an amorphous metal. / Tarumi, R.; Ogura, A.; Shimojo, Masayuki; Takashima, K.; Higo, Y.

Materials Research Society Symposium - Proceedings. 版 / D. Farkas; H. Kung; M. Mayo; H. Swygenhoven; J. Weertman. 巻 634 2001.

研究成果: Conference contribution

Tarumi, R, Ogura, A, Shimojo, M, Takashima, K & Higo, Y 2001, Molecular dynamics simulation of nano-sized crystallization during plastic deformation in an amorphous metal. : D Farkas, H Kung, M Mayo, H Swygenhoven & J Weertman (版), Materials Research Society Symposium - Proceedings. 巻. 634, Structure and Mechanical Properties of Nanophase Materials- Theory and Computer Si,ulation v.s Experiment, Boston, MA, United States, 00/11/28.
Tarumi R, Ogura A, Shimojo M, Takashima K, Higo Y. Molecular dynamics simulation of nano-sized crystallization during plastic deformation in an amorphous metal. : Farkas D, Kung H, Mayo M, Swygenhoven H, Weertman J, 編集者, Materials Research Society Symposium - Proceedings. 巻 634. 2001
Tarumi, R. ; Ogura, A. ; Shimojo, Masayuki ; Takashima, K. ; Higo, Y. / Molecular dynamics simulation of nano-sized crystallization during plastic deformation in an amorphous metal. Materials Research Society Symposium - Proceedings. 編集者 / D. Farkas ; H. Kung ; M. Mayo ; H. Swygenhoven ; J. Weertman. 巻 634 2001.
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