Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 655, Issue -, Pages 321-330Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.01.008
Keywords
Adiabatic shear bands; Self-organization; Shear-band spacing; ZK60 magnesium alloy
Categories
Funding
- National Natural Science Foundation of China [51274245, 51574290]
- NSAF [U1330126]
- Ph.D. Programs Foundation of Ministry of Education of China [20120162130006]
- Hunan Provincial Natural Science Foundation of China [14JJ2011]
- key project of State Key Laboratory of Explosion Science and Technology [KFJJ11-1]
Ask authors/readers for more resources
Self-organization of shear bands in the ZK60 magnesium alloy was investigated by means of the radial collapse of the thick-walled cylinder technique. The distribution, the width, and the spacing of the multiple shear bands were examined under different effective strains. Optical microscopic examination showed the evolution of multiple shear bands was a competitive process, and influenced each other. The perturbation source such as precipitated phase and grain boundary can affect shear-band propagation, and leading to merging and bifurcation. The shear bands propagated along clockwise or counter clockwise direction at 45 degrees or 135 degrees with the radius from the internal boundary of the ZK60 cylindrical specimens, and exhibited approximately a symmetrical distribution pattern without obvious optimum selecting in direction. Results from an experimental investigation, the shear-band averaged width increased with the increase of the effective strain, varied between 3.83 mu m and 9.87 mu m with the effective strain varying from 0.57 to 0.88. The shear-band spacing was measured and compared with theoretical predictions in the frame of Grady-Kipp (momentum diffusion), Wright-Ockendon, and Molinari (perturbation) models. The results are closer to the theoretical predictions of the perturbation models, which indicated the shear-band spacing was determined by small perturbation of initiation, and interaction effect of multiple shear bands also cannot be ignored during the propagation process. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available