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首页> 外文会议>Symposium Proceedings vol.842; Symposium on Integrative and Interdisciplinary Aspects of Intermetallics; 20041129-1201; Boston,MA(US) >A Study of the Deformation Behavior of Lamellar γ-TiAl by Numeric Modeling
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A Study of the Deformation Behavior of Lamellar γ-TiAl by Numeric Modeling

机译：数值模拟研究层状γ-TiAl的变形行为

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摘要

In this paper the deformation behavior of a fully lamellar microstructure, which is usually present in cast γ-TiAl based alloys, is studied by numerical modeling. After large compressive deformation at elevated temperatures the lamellar colonies are often bent or buckled depending on their orientation, which is representative for a deformation instability characterized by a large wave length. Such a deformation behavior is triggered by both, structural defects of the lamellae and their somewhat irregular arrangement. In addition, a shear band-type deformation mode occurs according to an instability mode exhibiting a short wave length. These two deformation modes interact in a rather subtle way, which leads to a very inhomogeneous deformation pattern.
机译：本文通过数值模型研究了通常存在于铸造γ-TiAl基合金中的全层状显微组织的变形行为。在升高的温度下进行大的压缩变形后，层状菌落通常会根据其取向而弯曲或弯曲，这代表了以大波长为特征的变形不稳定性。这种变形行为是由薄片的结构缺陷及其略微不规则的布置引起的。另外，剪切带型变形模式根据表现出短波长的不稳定性模式而发生。这两种变形模式以相当微妙的方式相互作用，从而导致非常不均匀的变形模式。

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