Responses of microstructure and texture of α phase to boron addition in Ti-40Al-8Nb-xB alloys modified by hot deformation above the β transus
Responses of microstructure and texture of α phase to boron addition in Ti-40Al-8Nb-xB alloys modified by hot deformation above the β transus
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β相变以上热变形改性 Ti-40Al-8Nb-xB 合金中 α 相显微组织和织构对硼添加的响应
DOI：
10.1016/j.matchar.2019.05.007
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发表时间：
2019-07
影响因子：
4.7
通讯作者：
Hongchao Kou
中科院分区：
文献类型：
--
作者：
Pujian Tian;Guang Yang;Zhenghao Ge;Yifei Wang;Liang Cheng;Yanhui Liu;Hongchao Kou
在Ti-40 Al-8 Nb-（0，0.5，1）B合金中，在β相区进行热变形（at. %），以改变合金中β相和硼化物的显微组织。特别关注了硼含量对转变α相组织的影响。结果表明，不同硼含量的压缩试样中，α相的显微组织有显著差异。Ti-40 Al-8 Nb合金中的α相呈板条状，而含硼合金中的α相呈等轴状。α相的形态与α相是否遵循与β基体的Burgers取向关系（BOR）密切相关，即，当α相跟随BOR时，α相的板条状形态和当α相不跟随BOR时的等轴形态。此外，在Ti-40 Al-8 Nb、Ti-40 Al-8 Nb-0.5B和Ti-40 Al-8 Nb-1B合金的压缩样品中，α相分别具有<11−20>纤维织构、<11-20>-<10-10>双纤维织构和随机晶体学取向。详细的分析表明，<11-20>α相的纤维织构的强度取决于具有BOR的α相与β基体的体积分数和<111>β相的纤维织构的强度的组合，而α相的<10 - 10>纤维织构的强度受变形期间硼化物的再取向行为的影响。
In this study, hot deformation is performed in the β-phase region in Ti-40Al-8Nb-(0, 0.5, 1)B alloys (at. %) in order to modify the microstructures of the β phase and borides in the alloys. Special attention is paid to the effect of boron content on the microstructure of the transformed α phase. The obtained results show that the microstructure of the α phase is significantly different in compressed samples with different boron contents. The α phase has a lath-like morphology in the Ti-40Al-8Nb alloy, whereas it has equiaxed features in the boron-added alloys. The morphology of the α phase is closely related to whether the α phase follows the Burgers orientation relationships (BORs) with the β matrix, i.e., lath-like morphologies of the α phase when it follows the BORs and equiaxed morphologies when it does not follow the BORs. In addition, in the compressed samples of the Ti-40Al-8Nb, Ti-40Al-8Nb-0.5B, and Ti-40Al-8Nb-1B alloys, the α phase has an <11−20> fiber texture, an <11–20>–<10–10> double fiber texture, and randomly crystallographic orientations, respectively. Detailed analyses demonstrate that the intensity of the <11–20> fiber texture of the α phase is governed by a combination of the volume fraction of the α phase that has BORs with the β matrix and the intensity of the <111> fiber texture of the β phase, whereas the intensity of the <10−10> fiber texture of the α phase is affected by the reorientation behavior of borides during the deformation.
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影响因子：
6.2
作者：
通讯作者：
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影响因子：
6
作者：
Chao Yang;Hui Jiang;D. Hu;A. Huang;M. Dixon
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DOI：
10.4028/www.scientific.net/msf.706-709.1089
发表时间：
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期刊：
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影响因子：
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作者：
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通讯作者：
M. Oehring;A. Stark;J. Paul;T. Lippmann;F. Pyczak
DOI：
10.1007/s11661-018-4831-9
发表时间：
2018-07
期刊：
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影响因子：
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作者：
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通讯作者：
Z. B. Zhao;Q. J. Wang;J. R. Liu;J. Tan;R. Yang
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影响因子：
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作者：
Guang Yang;Hongchao Kou;Jieren Yang;Jinshan Li;Hengzhi Fu
通讯作者：
Hengzhi Fu