The evolution of microtexture and macrotexture during subtransus forging of Ti-10V-2Fe-3Al
The evolution of microtexture and macrotexture during subtransus forging of Ti-10V-2Fe-3Al
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DOI：
10.1016/j.msea.2007.10.059
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发表时间：
2008-08-15
期刊：
影响因子：
6.4
通讯作者：
Dye, D.
中科院分区：
文献类型：
--
作者：
Raghunathan, S. L.;Dashwood, R. J.;Dye, D.
用中子、原位同步加速器X射线衍射仪和非原位电子背散射衍射仪对Ti-10V-2Fe-3Alα+β锻造过程中产生的宏观织构和微观织构进行了表征。EBSD分析表明，在应变为0.8，应变率为0.1和0.01的S(-1)处测得的取向偏差分布相似，平均取向偏差为2.2度。在锻造过程中，从母材继承的中等立方宏观织构转变为中等纤维织构，主要变化发生在0.4-0.6应变之间。同步加速器衍射研究可以表征单个颗粒的取向演化。在最高应变率为0.1时S(-1)，这表明在低应变时晶体马赛克(峰角扩展)的分散，到较大应变时晶体马赛克的收敛。在较低的应变速率下，只观察到晶体马赛克的收敛。这些结果表明，在应变速率为0.1时，变形早期的变形控制行为与在低应变速率和高应变下的扩散、恢复控制行为之间的机制发生了变化。(C)2007 Elsevier B.V.保留所有权利。
The macrotextures and microtextures produced during alpha+beta forging of Ti-10V-2Fe-3Al were characterised using neutron, in situ synchrotron X-ray and ex situ electron backscatter diffraction (EBSD). The EBSD analysis showed that the measured misorientation distributions at a strain of 0.8 and strain rates of 0.1 and 0.01 s(-1) were similar, with an average misorientation of 2.2 degrees. During forging, the moderate cube macrotexture inherited from the parent material was converted into a moderate fibre texture, with the major change occurring between strains of 0.4 and 0.6. The synchrotron diffraction studies allowed the orientation evolution of individual grains to be characterised. At the highest strain rate of 0.1 s(-1), this indicated a change in behaviour from dispersion of the crystal mosaic (peak angular spread) at low strains, to convergence of the crystal mosaic at larger strains. At lower strain rates, only convergence of the crystal mosaic was observed. It is suggested that these results indicate a change in mechanism between deformation-controlled behaviour during the early stages of deformation and a strain rate of 0.1 s(-1) and diffusional, recovery-controlled behaviour at lower strain rates and higher strains. (C) 2007 Elsevier B.V. All rights reserved.