Anisotropy of strength and plasticity in single-colony lamellar structure of Ti‒6Al‒4V alloy. (1st March 2020)

• Record Type: Journal Article
• Authors: Mine, Yoji; Matsuzaki, Yuya; Takashima, Kazuki
• Is Part Of: Scripta materialia. Number 177(2020)
• Page Start: 223
• Page End: 228
• Publication Date: 2020-03-01
• Subjects: Micro-tensile test -- Titanium alloys -- Plastic deformation -- Interfaces -- Slip; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.10.016
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Micro-tensile tests were performed on single-colony specimens to elucidate the anisotropic slip behaviour in Ti‒6Al‒4 V alloy with a lamellar microstructure. The critical resolved shear stress (CRSS) of 〈 c + a 〉 pyramidal slip was more than 1.5 times higher than that of 〈 a 〉 slip. The CRSSes of 〈 a 〉 slips increased with increasing length fraction of β phase along the slip direction, revealing that the β phase acts as a hard phase for soft orientations. The 〈 c + a 〉 pyramidal slip with β laths exhibited a low CRSS value compared with that of a Ti–5Al solid solution, suggesting that the β phase facilitates the 〈 c + a 〉 slip. Graphical abstract: Image, graphical abstract