Study on the relationship between microstructure and mechanical property in a metastable β titanium alloy
Study on the relationship between microstructure and mechanical property in a metastable β titanium alloy
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亚稳态β钛合金显微组织与力学性能关系研究
DOI：
10.1016/j.jallcom.2014.12.100
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发表时间：
2015-04-05
影响因子：
6.2
通讯作者：
Chen, J. H.
中科院分区：
文献类型：
--
作者：
Li, C.;Chen, J.;Chen, J. H.
本文报道了Ti-10V-2Fe-3Al合金中微观组织对不同变形机制的活性及其力学行为的影响。不同的热处理形成了不同的显微组织。根据组织的不同，合金的力学性能有明显的差异。结果表明，球状a相（在α + β相场固溶条件下形成）和针状a相（在β +(α + β)相场固溶条件下形成）对合金力学性能有不同的影响。在时效条件下，合金的显微组织和力学性能随时效时间的变化不明显。相中典型的变形组织总是{10 (1)/ bar1}型孪晶。随着β相稳定性的降低，β相的变形机制由{112}< 111 >型孪晶转变为应力诱导马氏体相变。a相和β相的显微组织对断口形貌有很大的影响。(C) 2014 Elsevier B.V.版权所有
This paper reports the results of an ongoing research which was set up to investigate the effect of microstructures on the activity of different deformation mechanisms and the resulting mechanical behavior in Ti-10V-2Fe-3Al alloy. Various microstructures were established by different heat treatments. Depending on the microstructures, obvious differences in the mechanical properties of this alloy were obtained. It is shown that globular a phase (formed in alpha + beta phase field solution treatment conditions) and acicular a phase (formed in beta+(alpha + beta) phase field solution treatment conditions) have different effects on mechanical property. In aging conditions, the microstructure and mechanical property do not change apparently with the aging time. Typical deformation microstructure in a phase is always the {10 (1) over bar1} type twin. With the decrease of beta phase stability, the deformation mechanism of beta phase varies from {112}< 111 > type twin to stress induced martensitic transformation. The microstructure of the a phase and beta phase has a great influence on the fractographic morphology. (C) 2014 Elsevier B.V. All rights reserved.