Mechanical metallurgy is the science of making metals with properties suitable for practical use. Therefore it is necessary to develop the CAE system that can predict material condition. Generally speaking metallurgical phenomenon are related with micro structure in the crystal. But at this moment real relationship between mechanical work and metallurgy is not known.

This paper presents the mesoplasticity FEM that includes the dislocation behavior and we discuss the relationship between micro structure in the crystal and metallurgical phenomenon through experimentation and simulaition. First of all mesoplasticity FEM based on dislocation behavior were developed. This FEM could predict the dislocation distribution in the material. We discussed the relationship between recovery and micro structure by this FEM and experiment.

Secondely recrystallization was studied. The bicrystal prepared was stretched and put in a furness. recrystallization and migration were observed. Simultaneously we simulated the disloocation, deformation energy and rotation distribution by this FEM. We could know the good relation between the factors and recrystallizaiton.

This technique that use mesoplasticity included dislocation behavior was an agreement with metallurgical phenomenon. But it is not a good agreement. We found this problem depended on our hardening law. Therefore finally we suggested the new hardening law based on atomic dynamics.

Master thesis 18/2/2000

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Publication

1, M.Yoshino, J.Eto, T.Shirakashi, Proceeding of JSTP spring conference,
   1997,pp113-114
2, M.Yoshino, J.Eto, T.Shirakashi, Proceeding of JSTP spring conference,
   1998,pp235-236
3, M.Yoshino, J.Eto, T.Shirakashi, Simulation of Materials Processing:
   Theory,Methods and Application, Numiform, 1998, pp335-340

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Jun Eto Mail: jeto@mes.titech.ac.jp

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This page last updated on September 18, 1999.