Fracture in metallic glasses: mechanics and mechanisms
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- 作者：R. Narasimhan (1)
Parag Tandaiya (2)
I. Singh (1)
R. L. Narayan (3)
U. Ramamurty (3) (4)
1. Department of Mechanical Engineering ; Indian Institute of Science ; Bangalore ; 560012 ; India
2. Department of Mechanical Engineering ; Indian Institute of Technology-Bombay ; Mumbai ; 400076 ; India
3. Department of Materials Engineering ; Indian Institute of Science ; Bangalore ; 560012 ; India
4. Center of Excellence for Advanced Materials Research ; King Abdulaziz University ; Jeddah ; 21589 ; Saudi Arabia - 关键词：Metallic glasses ; Crack tip fields ; Vein patterns ; Shear bands ; Nanocorrugations ; Cavitation
- 刊名：International Journal of Fracture
- 出版年：2015
- 出版时间：February 2015
- 年：2015
- 卷：191
- 期：1-2
- 页码：53-75
- 全文大小：5,188 KB
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Mechanical Engineering - 出版者：Springer Netherlands
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文摘
Significant progress in understanding the mechanical behavior of metallic glasses (MGs) was made over the past decade, particularly on mechanisms of plastic deformation. However, recent research thrust has been on exploring the mechanics and physics of fracture. MGs can be very brittle with \(K_{Ic}\) values similar to silicate glasses and ceramics or very tough with \(K_{Ic}\) akin to high toughness crystalline metals. Even the tough MGs can become brittle with structural relaxation following annealing at temperatures close to glass transition temperature \((T_{g})\) . Detailed experimental studies coupled with complementary numerical simulations of the recent past have provided insights on the micromechanisms of failure as well as nature of crack tip fields, and established the governing fracture criteria for ductile and brittle glasses. In this paper, the above advances are reviewed and outstanding issues in the context of fracture of amorphous alloys that need to be resolved are identified.