書誌事項
- タイトル別名
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- Evaluation of Deformation Behavior in Amorphous Metals by Atomic Elastic Stiffness Coefficients
- ゲンシ ダンセイ ゴウセイ ケイスウ ニ ヨル アモルファス キンゾク ノ ヘンケイ キョドウ ノ ヒョウカ
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We have performed the indentation simulation to a Ni50Al50 amorphous metal by the molecular dynamics method, and discussed the plastic deformation behavior in amorphous structure by atomic strains and atomic elastic stiffness coefficients, Bαij, or the second-order derivatives of atomic energy. During the indentation, zonal regions like shear bands below the indentation point show large values of local deviatric strains and local volume strains.The number of both positive and negative switching of positivity of det Bαij increases according to the formation of shear bands. On the other hand, the “probabilistic” switching of positivity of det Bαij constantly occurs due to subtle changes in local volume strains even at the equilibrium state. In order to understand the plastic deformation behavior, we should observe the switching of positivity of det Bαij with the exception of small variation of local volume strains. Evaluation of the switching with a large variation of local volume strains reveals occurrence of deformation propagation and extensive rearrangements of atoms around shear bands.
収録刊行物
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- 材料
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材料 62 (3), 179-184, 2013
公益社団法人 日本材料学会
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詳細情報 詳細情報について
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- CRID
- 1390001205445138560
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- NII論文ID
- 130003367147
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- NII書誌ID
- AN00096175
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- COI
- 1:CAS:528:DC%2BC3sXptFyksLw%3D
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- ISSN
- 18807488
- 05145163
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- NDL書誌ID
- 024401101
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可