Crystallographic orientation dependent crack nucleation during the compression of a widmannstätten-structure α/β titanium alloy. (November 2018)

• Record Type: Journal Article
• Authors: Yan, Zhibing; Wang, Ke; Zhou, Yu; Zhu, Xuefeng; Xin, Renlong; Liu, Qing
• Is Part Of: Scripta materialia. Number 156(2018)
• Page Start: 110
• Page End: 114
• Publication Date: 2018-11
• Subjects: Titanium alloy -- Slip transfer -- Stress concentration -- Crack nucleation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.07.023
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Based on the observation on slip trace and crystallographic orientation, the corresponding slip system, Schmid factor (SF) and geometric compatibility parameter ( m' ) around the crack were calculated during compression of a widmannstätten-structure α/β titanium alloy. The difficult slip transfer, mainly occurring at a low m', induces a stress concentration on the grain boundary α (αGB ) and at the junction of several α colonies in the β grain, and then arouses a corresponding crack nucleation. The αGB -α colony boundary, α-β interface, colony-colony boundary and slip plane could act as the crack propagation ways according to the different crack nucleation site. Graphical abstract: Unlabelled Image