近β型Ti-1300合金的显微组织分析  

Microstructure analysis of near β Ti-1300 alloy

作　　者：张志超[1] 金头男[1] 赵永庆[2] 常雷[1] 王二平[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]西北有色金属研究院,西安710016

出　　处：《中国有色金属学报》2015年第8期2115-2122,共8页The Chinese Journal of Nonferrous Metals

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。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 a 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 a phase is still found in the residual a phase. The twinning a phase has two different variants （al and a2）, the a1 variant is rotated about 60° with respect to a2 variant, and the two variants have 60° angle twinning relationship with the base a 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 β titanium.

关 键 词：Ti-1300合金 显微组织 相变 时效特征 

分 类 号：TG146.3[一般工业技术—材料科学与工程]