Microplasticity at Room Temperature inα/βTitanium Alloys
Microplasticity at Room Temperature inα/βTitanium Alloys
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DOI：
10.1007/s11661-020-05945-4
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发表时间：
2020-08-18
影响因子：
2.8
通讯作者：
Banerjee, D.
中科院分区：
文献类型：
--
作者：
Hemery, S.;Villechaise, P.;Banerjee, D.
综述了目前对α/β钛合金室温微塑性的认识，特别强调了双相工程合金。由于微观结构和变形机制之间的相互作用决定了微观尺度和宏观尺度的力学响应，首先简要描述了α/β微观结构的主要特征。然后描述各个阶段的弹性和塑性变形。综述了晶界、相界面和微观织构对变形行为影响的复杂相互作用。在过去的十年里，晶体塑性模拟已经发展成为了解钛合金变形机理的关键技术。细观力学方面强调与讨论所需的输入参数，以实现现实的本构建模。由于微塑性在循环载荷中尤其相关，例如部件在使用中经历的循环载荷，因此在最后一节中简要总结了目前对该状态与疲劳和驻留疲劳行为之间关系的理解。
The current understanding of room temperature microplasticity in alpha/beta titanium alloys is reviewed with a special emphasis on dual-phase engineering alloys. As the interplay between microstructure and deformation mechanisms governs both the microscale and macroscale mechanical response, a brief description of the main features of alpha/beta microstructures is first provided. Elastic and plastic deformation in individual phases is then described. The complex interactions that govern the effect of grain boundaries, phase interfaces and microtexture on deformation behaviour are reviewed. Crystal plasticity simulations have evolved over the past decade as a key technique to obtain a mechanistic understanding of the deformation of Ti alloys. Micromechanical aspects are emphasized with a discussion of input parameters required to achieve realistic constitutive modeling. As microplasticity is especially relevant in cyclic loading such as experienced in-service by components, the current understanding of the relation of this regime with fatigue and dwell-fatigue behavior is briefly summarized in the final section.