Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7972220 | Materials Science and Engineering: A | 2018 | 15 Pages |
Abstract
The characteristics of shear bands in cold-rolled Ta-2.5W alloy are systematically investigated at different mechanical reduction levels. With increasing strain, the shear bands can appear as in-grain shear bands, trans-granular shear bands and wavy bands. At low strain the crystallographic planar in-grain shear bands are aligned close to the highly stressed slip planes at low strain. As strain increases, the shear bands rotate around the <110> or <111> direction to smaller inclination angles with respect to the rolling direction (RD). Meanwhile, new groups of shear bands are developed. Two groups of in-grain shear bands with a specific fishbone structure appear in the orientations with larger Taylor factor at medium strain. The trans-granular shear bands are formed when the adjacent grains get the continuity of slip planes. Therefore, the frequency of trans-granular shear bands increases with the enhancing of local texture. The wavy bands appear to be a result of sequential necking in the harder γ-fiber and a cooperative flow in the softer α-fiber. Meanwhile, the formation model of the wavy bands is also proposed based on the laminar composites.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
S. Wang, Z.H. Wu, C. Chen, S.K. Feng, R. Liu, B. Liao, Z.H. Zhong, P. Lu, M.P. Wang, P. Li, Jan W. Coenen, L.F. Cao, Y.C. Wu,