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Two-Scale Thermo-Crystal Plasticity Finite Element Analysis of Dynamic-Recrystallization Texture Evolution

[+] Author Affiliations
Yuhei Ueda, Yu Goto, Toshihiko Yamaguchi, Yoshihiro Tomita, Yusuke Morita, Eiji Nakamachi

Doshisha University, Kyoto, Japan

Paper No. IMECE2016-66437, pp. V014T11A017; 8 pages
doi:10.1115/IMECE2016-66437
From:
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 14: Emerging Technologies; Materials: Genetics to Structures; Safety Engineering and Risk Analysis
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5068-8
  • Copyright © 2016 by ASME

abstract

In order to predict dynamic recrystallization (DRX) texture evolution during the forming processes of aluminum alloy, we propose a hypothesis to predict DRX evolution and develop a comprehensive computational tool for the thermal process metallurgy simulation. It consists of the two-scale finite element method based on the thermo-coupled elasto-crystalline plasticity analysis and the dynamic-explicit finite element procedure. It can predict the heat generation and diffusion, and plastic anisotropy at the macro-scale, and the crystal texture evolution including DRX due to the plastic deformation and heat generation at the micro-scale.

The computationally evaluated texture evolution, which includes DRX texture, under the severe compression at high temperature is compared against the experimental results of pole figures and orientation distribution function (ODF) analyses. The results predict the evolution of the cube component which is observed in the experiments. Therefore, our proposed method is approved to have a potential predicting DRX texture evolution. Furthermore, we clarify the effect of DRX texture on the onset of such instabilities as necking, surface instability and shear bands which are closely related to the formability or failure of the materials.

Copyright © 2016 by ASME

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