Brittle and ductile fracture at the atomistic crack tip in copper crystals
- Chinese Academy of Sciences, Beijing (China). Inst. of Mechanics
Experimental results show that the brittle cleavage especially in metal is often accompanied by considerable amount of dislocation activation. Cracks often grow in a zigzag manner along the alternative slip plane of the emitted dislocations (Ohr, Hong and Laird). On the other hand, the dislocation emission and crack propagation depend strongly on the geometric relation between crack and crystal orientation. This effect must be considered so as to properly describe the behaviors of ductile and brittle fracture in crystal. In the present paper, the molecular dynamics method is used to simulate ductile and brittle failure at the atomistic crack tip in copper with FCC structure. Here the authors only consider the cases of a crack tip intersected by a single inclined slip plane. The effects of geometry of crack and crystal orientation on the crack tip processes are studied.
- OSTI ID:
- 99264
- Journal Information:
- Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 2 Vol. 33; ISSN 0956-716X; ISSN SCRMEX
- Country of Publication:
- United States
- Language:
- English
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