Molecular Dynamics Simulation on Shape-memory Effect in Ni-Al Alloy by Using EAM Potential

• UEHARA Takuya

  Department of Energy Conversion Science, Kyoto University

• TAMAI Takato

  Department of Energy Conversion Science, Kyoto University

Bibliographic Information

Other Title

• ＥＡＭポテンシャルによるＮｉ‐Ａｌ合金における形状記憶効果の分子動力学シミュレーション
• EAM ポテンシャル ニ ヨル Ni Al ゴウキン ニ オケル ケイジョウ キオク コウカ ノ ブンシ ドウリキガク シミュレーション

Abstract

Molecular dynamics simulations on the shape memory effect are carried out by using the EAM potential for Ni-Al alloy. As a preliminary calculation, the stable crystal structures are investigated, so that both bcc and martensite phases are obtained and the temperature-dependent transformation can occur. As a result, it is revealed that 60-70% Ni models show the martensite structure at low temperature, and bcc at high temperature, and the transformation temperature depends on the Ni content. In order to simulate the shape-memory behavior, a series of loading, unloading, heating, and cooling conditions is imposed for 68% Ni model. In the loading process, the model is deformed by the motion of variant boundaries, and a large deformation is observed. The deformation does not disappear even the model is unloaded. However, the model recovers the original shape when it bears the heat treatment process incorporating the phase transformation to bcc structure.

Journal

• TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A

  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 71 (705), 717-723, 2005

  The Japan Society of Mechanical Engineers

Keywords

• Molecular Dynamics
• Computational Mechanics
• Numerical Analysis
• Shape Memory Effect
• Martensite
• Phase Transformation
• Embedded Atom Method
• Nickel-Aluminum Alloy

Details

• CRID: 1390001204478133504
• NII Article ID: 110004999000
• NII Book ID: AN0018742X
• DOI: 10.1299/kikaia.71.717
• COI: 1:CAS:528:DC%2BD2MXntVOmtbc%3D
• ISSN: 18848338
• ISSN: 03875008
• ISSN: http://id.crossref.org/issn/00290270
• NDL BIB ID: 7376291
• Web Site: http://id.ndl.go.jp/bib/7376291
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7376291
• Web Site: http://www.jstage.jst.go.jp/article/kikaia1979/71/705/71_705_717/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed