Effect of β Annealing and near β Zone Hot Deformation on the Microstructure and Texture of TC18 Alloy

Yi Min Cui; Wei Wei Zheng; Feng Zhang; Ai Xue Sha

doi:10.4028/www.scientific.net/MSF.849.226

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HomeMaterials Science ForumMaterials Science Forum Vol. 849Effect of β Annealing and near β Zone Hot...

Effect of β Annealing and near β Zone Hot Deformation on the Microstructure and Texture of TC18 Alloy

Abstract:

Forged TC18 alloy billets with strong <100> texture were selected to investigate the effects of β annealing and near β zone hot deformation on the microstructure and texture by means of optical microscopy, XRD and EBSD techniques. The results showed that the original <100> fiber texture can’t be eliminated through β annealing although completed static recrystallization happened during annealing. After deforming in near β phase zone, the microstructures were composed of elongated β grains. A lot of small angle boundaries were observed near the original β grain boundaries, indicating that dynamic recovery controlled the deformation. Dynamic recrystallization grains can only be seen at the original β grain boundary at the strain of 50%. <100>//TD and <111>//TD texture were generated during the near β zone hot deformation. Annealing at dual phase zone after hot deformation can effectively reduce the proportion of grains with <111> orientation, but the <100>//TD texture still existed.

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Periodical:

Materials Science Forum (Volume 849)

Pages:

226-231

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.849.226

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Online since:

March 2016

Authors:

Yi Min Cui, Wei Wei Zheng, Feng Zhang, Ai Xue Sha

Keywords:

Hot Deformation, TC18 Titanium Alloy, Texture, β Annealing

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