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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >High temperature deformability and microstructural evolution of Ti–47Al–2Cr–0.2Mo alloy
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High temperature deformability and microstructural evolution of Ti–47Al–2Cr–0.2Mo alloy

机译：Ti–47Al–2Cr–0.2Mo合金的高温变形性和组织演变

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摘要

High temperature deformability and microstructural evolution of Ti–47Al–2Cr–0.2Mo alloy were studied by using a Gleeble-1500 simulated machine at temperature from 1050 ℃ to 1150 ℃ with strain rate from 2.5 s~(-1) to 7.5 s~(-1) and engineering compressive strain from 20% to 50%. The results indicate that the largest engineering compressive strain of the alloy increases with decreasing strain rate and increasing deformation temperature. It has been shown that the strain rate affects the largest engineering compressive strain of the alloy effectively. High temperature deformation mechanism of Ti–47Al–2Cr–0.2Mo alloy mainly refers to the bending and fracturing of the lamellar structures and dynamic recrystallization (DRX). Electron back scattered diffraction (EBSD) and transmission electron microscopic (TEM) results reveal the DRX mostly occurring at grains boundary and interlamellar spacing at a strain rate of 7.5 s~(-1) is much finer than that at a strain rate of 2.5 s~(-1) at 1150 ℃.
机译：利用Gleeble-1500模拟机研究了Ti–47Al–2Cr–0.2Mo合金的高温变形能力和组织演变，温度范围为1050℃至1150℃，应变速率为2.5 s〜（-1）至7.5 s〜（ -1）和20％至50％的工程压缩应变。结果表明，合金的最大工程压缩应变随着应变率的降低和变形温度的升高而增加。已经表明，应变速率有效地影响合金的最大工程压缩应变。 Ti–47Al–2Cr–0.2Mo合金的高温变形机理主要是指层状结构的弯曲和断裂以及动态再结晶（DRX）。电子背散射衍射（EBSD）和透射电子显微镜（TEM）结果表明，DRX主要出现在晶界，且层间间距在7.5 s〜（-1）的应变速率下比在2.5 s的应变速率下细得多〜（-1）在1150℃。

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