Evolution of equiaxed alpha phase during heat treatment in a near alpha titanium alloy
Evolution of equiaxed alpha phase during heat treatment in a near alpha titanium alloy
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DOI：
10.1016/j.jallcom.2017.07.195
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发表时间：
2017-11-25
影响因子：
6.2
通讯作者：
Wang, Qingjiang
中科院分区：
文献类型：
--
作者：
Gao, Xiongxiong;Zeng, Weidong;Wang, Qingjiang
研究了近α钛合金Ti-5.6Al-3.8Sn-3.2Zr-1.0Ta-0.5Mo-0.4Nb-0.35Si在变形后热处理过程中等轴初生α相（α（p））的演变。将该合金在1019 ℃下等温压缩，随后在1024 ℃下热处理0.5至24小时。通过晶体学取向和显微组织观察，分析了等轴晶内的再结晶行为和晶界劈裂。结果表明，α（p）内的内（次）边界是由强回复形成的。在大多数情况下，很难通过边界分裂获得大的等轴α（p）晶粒细化，在相对较短的热处理时间内，α（p）晶粒仍然以“花生”形状连续（
The evolution of equiaxed primary a phase (alpha(p)) during post-deformation heat treatment of near-alpha titanium alloy Ti-5.6Al-3.8Sn-3.2Zr-1.0Ta-0.5Mo-0.4Nb-0.35Si was studied. This alloy was isothermally compressed at 1019 degrees C and subsequently heat treatment at 1024 degrees C for times ranging from 0.5 to 24 h. The recrystallization behavior and boundary splitting within equiaxed ap were analyzed by crystallo-graphic orientation and microstructure observations. The results showed that the formation of internal (sub) boundaries within the alpha(p) was by the strong recovery. In most cases, it is difficult to obtain a refinement of big equiaxed alpha(p) by boundary splitting and ap grains were still contiguous with "peanut" shape at relatively short heat treatment time (