【摘要】 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,〈 0001〉α,twinning//〈 1101〉α。Ti-1300钛合金与大多数近β型钛合金的时效特征相类似。更多还原

【Abstract】 The microstructure changes of near βTi-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,<0001>_α.twinning//<1101>_α.The aging characteristics of Ti-1300 alloy are similar to the other near βtitanium.更多还原