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近β型Ti-1300合金的显微组织分析
发布人：上海艾荔艾金属材料有限公司www.shailiai.com
更新时间：2015-09-17
采用扫描电镜和透射电镜分析近β型Ti-1300钛合金在初始锻造态、固溶+淬火态(β和α+β固溶态)以及固溶+时效态下的显微组织变化。
近β型Ti-1300合金的显微组织分析Microstructure analysis of near β Ti-1300 alloy
采用扫描电镜和透射电镜分析近β型Ti-1300钛合金在初始锻造态、固溶+淬火态(β和α+β固溶态)以及固溶+时效态下的显微组织变化。结果表明：锻造态合金中初生α相内部发生孪生切变行为，基体β相晶内发生β→α相变。合金经过α+β固溶淬火处理，残留的初生α相中仍然可观察到细小孪生α相。孪生α相有两种不同变体(α1和α2)，互成60°生长方向，而且与基体α相也成60°的孪生关系，其间的晶体学取向关系为：{1120}α, twinning//{1120}α，á0001？α, twinning //á1101？α。Ti-1300钛合金与大多数近β型钛合金的时效特征相类似。
The microstructure changes of near β Ti-1300 alloy, including the originally forged sample, the solution treated and the quenched sample (β and (α+β) solid solution state) and solution treated and aged sample, were investigated in detailly by SEM and TEM. The results show that, in the as-forged alloy, the twinning deformation behavior occurs in the primary α phase, the β→α phase transformation also occurs in the base β phase. During the (α+β)-solutionized condition of the forged samples, the twinning α phase is still found in the residual α phase. The twinning α phase has two different variants (α1 and α2), the α1 variant is rotated about 60° with respect to α2 variant, and the two variants have 60° angle twinning relationship with the base α phase, the orientation relationship can be described as follows:{1120}α, twinning//{1120}α, á0001？α, twinning //á1101？α. The aging characteristics of Ti-1300 alloy are similar to the other near β titanium.
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