Reconstruction of parent microstructures in TRIP titanium alloys
Reconstruction of parent microstructures in TRIP titanium alloys
复制标题
DOI：
10.1016/j.scriptamat.2022.115248
复制
发表时间：
2023-03
影响因子：
6
通讯作者：
A. Saville;B. Ellyson;A. Eres-Castellanos;J. Benzing;A. Clarke
中科院分区：
文献类型：
--
作者：
A. Saville;B. Ellyson;A. Eres-Castellanos;J. Benzing;A. Clarke
亚稳β-钛合金Ti-10V-2Fe-3Al （wt%）表现出相变诱导塑性（TRIP）（或母体β相向产物马氏体转变）和良好的加工硬化特性。然而，在TRIP变形过程中，大部分母晶β-Ti组织转变为α″马氏体，这就模糊了母晶取向对变形行为的影响。这项工作证明了由残余β-Ti和α″马氏体组成的部分转变显微组织成功地重建了母体β-Ti取向。利用实验导出的晶体取向关系（ORs）和一个新的计算导出的等效性质的OR来完成重建。尽管这两种ORs在晶体学上是相同的，但重建的β-Ti微观结构却存在显著差异，显示出在重建较少常见ORs的母相时可能存在的灵敏度。尽管存在这种差异，但从部分转变的微观结构中重建β-Ti微观结构的能力使Ti-10V-2Fe-3Al变形机制的取向特异性性能得以计算。
The metastable β-Ti alloy Ti-10V-2Fe-3Al (wt%) exhibits transformation induced plasticity (TRIP)(or the transformation of the parent β phase to product martensite) and desirable work hardening characteristics. However, the majority of the parent β-Ti microstructure is transformed into α ″martensite during deformation by TRIP, obscuring how parent grain orientations influence the deformation behavior. This work demonstrates the successful reconstruction of parent β-Ti orientations from partially transformed microstructures consisting of remnant β-Ti and α ″martensite. Reconstruction was completed using experimentally derived crystallographic orientation relationships (ORs) and a new, computationally derived OR of equivalent nature. Despite the two ORs being crystallographically identical, the reconstructed β-Ti microstructures showed significant differences, showcasing sensitivities that can be present in the reconstruction of parent phases with less common ORs. Regardless of this difference, the demonstrated ability to reconstruct β-Ti microstructures from partially transformed microstructures enables the calculation of orientation specific properties of deformation mechanisms in Ti-10V-2Fe-3Al.