An Electron Microscope Study of Mechanical Twinning in a Precipitation-Hardened TiAl Alloy

机译：沉淀强化TiAl合金中机械孪晶的电子显微镜研究

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The high temperature capability of TiAl alloys can be significantly improved by the implementation of precipitation reactions. From the engineering viewpoint the challenge is to establish the hardening mechanism without compromising desirable low temperature properties such as ductility and toughness. With this perspective in mind, twin structures were investigated in a TiAl alloy containing Ti_3AlC carbides, in order to identify mitigation strategies for overcoming precipitation induced embrittlement. The study is focussed on the nucleation and immobilization of twins at precipitates. The results are discussed in the context of the plastic anisotropy and fracture behaviour of TiAl alloys.

机译：通过实施沉淀反应，可以显着提高TiAl合金的高温性能。从工程学的角度来看，挑战在于建立硬化机制而不损害所需的低温性能，例如延展性和韧性。从这个角度出发，研究了含Ti_3AlC碳化物的TiAl合金中的孪晶结构，以确定缓解策略以克服沉淀引起的脆化。该研究集中于双胞胎在沉淀物上的成核和固定化。在TiAl合金的塑性各向异性和断裂行为的背景下讨论了结果。

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《Symposium Proceedings vol.842; Symposium on Integrative and Interdisciplinary Aspects of Intermetallics; 20041129-1201; Boston,MA(US)》|2004年|P.103-108|共6页
会议地点 BostonMA(US)
作者
Fritz Appel;
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作者单位

Institute for Materials Research, GKSS Research Centre Geesthacht, Geesthacht, D-21502, Germany;

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原文格式 PDF
正文语种 eng
中图分类材料;
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4. An Electron Microscope Study of Mechanical Twinning in a Precipitation-Hardened TiAl Alloy [C] . Fritz Appel Symposium on Integrative and Interdisciplinary Aspects of Intermetallics . 2005

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An Electron Microscope Study of Mechanical Twinning in a Precipitation-Hardened TiAl Alloy

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