The role of thermal cycling on twinning in metastable beta-Ti alloy. (15th April 2022)

• Record Type: Journal Article
• Authors: Sun, Bin; Sun, Kuishan; Meng, Xianglong; Wang, Jun
• Is Part Of: Scripta materialia. Number 212(2022)
• Publication Date: 2022-04-15
• Subjects: Shape memory alloy -- Titanium alloy -- Martensitic transformation -- Twinning; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2022.114554
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Twinning in a Ti−26Nb alloy during thermal cycling was investigated by transmission electron microscopy. The interrelationships between displacive transformation and twinning were proposed. Fine { 112 } β 1 ¯ 1 ¯ 1 β twins and preferentially formed ω particles were observed in the β matrix after 100 cycles. The { 112 } β 1 ¯ 1 ¯ 1 β twins nucleated in ω particles and grew by merging twin embryos. Upon further increasing the cycle number to 500, { 332 } β 11 3 ¯ β twins bounded with laminated α" martensite were observed instead. The interfacial twin boundary α" phase mediated the martensitic transformation of the adjacent region, leading to the formation of { 332 } β 11 3 ¯ β twins. Graphical abstract: Image, graphical abstract