Effect of pre-deforamtion in the β pahse field on the microstructure and texture of the α phase in a boron-added β-solidifying TiAl alloy
Effect of pre-deforamtion in the β pahse field on the microstructure and texture of the α phase in a boron-added β-solidifying TiAl alloy
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β相场预变形对加硼β凝固TiAl合金α相显微组织和织构的影响
DOI：
10.1016/j.jallcom.2018.01.314
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发表时间：
2018
影响因子：
6.2
通讯作者：
Cheng Liang
中科院分区：
文献类型：
--
作者：
Yang Guang;Ren Wei;Liu Yanhui;Song Wenjie;Han Fengbo;Chen Yi;Cheng Liang
本文研究了β相场预形变对Ti-40Al-8Nb-0.5B合金α相组织特征的影响。%)进行了调查。结果表明，形变对α相的形态和晶体结构有很大影响。观察到，在无变形的情况下，与α基体形成严格的Burgers取向关系的β板条占主导地位(∼占总数的81%)。相反，在α相场中压缩后，Burgers型β板条显著减少。同时，产生异常的双纤维织构<；11-20>；和<；10-10>；经过系统的分析，我们认为，Burgers型α的降低归因于α相在硼化物上的异质形核和变形过程中硼化物薄带的断裂。此外，α织构的形成是β织构和硼化物织构共同作用的结果。
In this work, the effect of pre-deformation in the β phase field on the microstructural characteristics of α phase in a Ti-40Al-8Nb-0.5B alloy (at. %) was investigated. The results showed that the morphology and crystallography of α phase were strongly influenced by the deformation. It was observed that if there was no deformation, α laths which formed strict Burgers orientation relationship with β matrix are predominant (∼81% in number fraction). In contrast, the Burgers α laths are significantly reduced after compression in the β phase field. Meanwhile, an abnormal double-fiber texture, <11–20> and <10–10>, is produced. After systematic analysis, we believe that the reduction of Burgers α is attributed to the heterogeneous nucleation of α phase at borides and the breakdown of the boride ribbons during deformation. Moreover, the formation of α texture is a synergetic consequence of β texture and boride texture.