A review of the metastable omega phase in beta titanium alloys: the phase transformation mechanisms and its effect on mechanical properties

IF 16.8 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Materials Reviews Pub Date : 2022-03-18 DOI:10.1080/09506608.2022.2036401

J. Ballor, Tong Li, F. Prima, C. Boehlert, A. Devaraj

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引用次数: 29

Abstract

ABSTRACT Since its discovery in 1954, the omega (ω) phase in titanium and its alloys has attracted substantial attention from researchers. The β-to-ω and ω-to-α phase transformations are central to β-titanium alloy design, but the transformation mechanisms have been a subject of debate. With new generations of aberration-corrected transmission electron microscopy and atom probe tomography, both the spatial resolution and compositional sensitivity of phase transformation analysis have been rapidly improving. This review provides a detailed assessment of the new understanding gained and related debates in this field enabled by advanced characterization methods. Specifically, new insights into the possibility of a coupled diffusional-displacive component in the β-to-ω transformation and key nucleation driving forces for the ω-assisted α phase formation are discussed. Additionally, the influence of ω phase on the mechanical properties of β-titanium alloys is also reviewed. Finally, a perspective on open questions and future direction for research is discussed.

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钛合金亚稳欧米茄相的相变机理及其对力学性能的影响

自1954年发现钛及其合金中的ω (ω)相以来，一直受到研究人员的广泛关注。β-to-ω和ω-to-α相变是β-钛合金设计的核心，但其转变机制一直是争论的主题。随着新一代像差校正透射电子显微镜和原子探针层析成像技术的发展，相变分析的空间分辨率和成分灵敏度都得到了迅速提高。这篇综述提供了一个详细的评估的新认识获得和相关的争论在这一领域的先进表征方法启用。具体来说，讨论了β -ω相变中耦合扩散-位移分量的可能性和ω辅助α相形成的关键成核驱动力的新见解。此外，还综述了ω相对β-钛合金力学性能的影响。最后，对未来的研究方向和有待解决的问题进行了展望。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Materials Reviews 工程技术-材料科学：综合

CiteScore

28.50

自引率

0.00%

发文量

审稿时长

6 months

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