The role of nano-scaled structural non-uniformities on deformation twinning and stress-induced transformation in a cold rolled multifunctional β-titanium alloy. (1st March 2020)

• Record Type: Journal Article
• Authors: Liang, Qianglong; Kloenne, Zachary; Zheng, Yufeng; Wang, Dong; Antonov, Stoichko; Gao, Yipeng; Hao, Yulin; Yang, Rui; Wang, Yunzhi; Fraser, Hamish L.
• Is Part Of: Scripta materialia. Number 177(2020)
• Page Start: 181
• Page End: 185
• Publication Date: 2020-03-01
• Subjects: Titanium alloys -- Deformation twinning -- Stress-induced α″ martensite -- Stress-induced ω phase -- O′ phase; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.10.029
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The microstructure in a multifunctional β-titanium alloy, Ti–24Nb–4Zr–8Sn (wt%), before and after cold rolling was investigated using conventional and aberration-corrected scanning/transmission electron microscopy. With the presence of nano-scaled orthorhombic phase (O′) and hexagonal phase (ω), primary {332}<113>β deformation twins were activated during cold rolling with a thin layer of orthorhombic martensite (α″) occupying every twin boundary. In the interior of primary twins, nano-scaled α″ particles were observed, together with secondary {112}<111>β twins. Our work may indicate that the pre-formed nano-scaled O′ phase assists in activating the {332}<113>β deformation twining and O′ phase transforms to nano-scaled stress-induced α″ during cold rolling. Graphical abstract: Image, graphical abstract