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In this study, the propagation behavior of {332}<113>β twins was investigated in a Ti-12Mo (wt.%) alloy with micro-segregation bands (Mo content ranging from 10 to 13 wt.%). A unique transition from {332}<113>β twins to α"-martensite was observed when those twins propagated across the Mo-lean bands inside the grain. A deflection angle of ~18 º was found between the twin boundary and the α"-martensite plate. This transition was more frequently found at relatively higher stresses. Thermodynamic analysis revealed that the Mo content together with the applied stress govern the required mechanical work for triggering α" martensitic phase transformation. The stress-induced α" martensitic phase transformation was easier to trigger in the Mo-lean bands, with a spontaneous interruption of the {332}<113>β twin propagation. The present chemically segregated microstructure provides a novel approach to comprehensively characterize the variable deformation modes in metastable β titanium alloys.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: beta titanium alloy, martensitic transformation, twinning

刊行年月日: 2024-02-03

出版者: Elsevier BV

掲載誌:

• Scripta Materialia (ISSN: 13596462) vol. 224 issue. 15 116024

研究助成金:

• Japan Society for the Promotion of Science JP26420733

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4436

公開URL: https://doi.org/10.1016/j.scriptamat.2024.116024

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更新時刻: 2026-02-03 12:30:04 +0900

MDRでの公開時刻: 2026-02-03 09:46:26 +0900