Investigation to the Effects of Grain Misorientation on the Performance of Short Cracks

Abstract:

The influences of crystallographic and geometric parameters such as grain misorientation on the performance of short cracks are illustrated based on FEM in this paper. Firstly, the microstructure is simulated to account for the effects of grain misorientation on the performance of short cracks and the short cracks are initiated within the microstructure for the further investigation. The influence of grain misorientation is demonstrated by the change of neighboring grain orientations with an initiated short crack from 0° to 180°. The effects of the grain boundary on the short crack with the crack arrested or retarded are described by the crack propagation until it approached the grain boundary. The results will give more useful information such as crack arrested and retardation to the further research on the characteristics and evolution of short cracks.

• Periodical: Key Engineering Materials (Volumes 353-358)
• Pages: 1165-1168
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.353-358.1165
• Online since: September 2007
• Authors: Yan Hai Xu, Hao Li, Li Guo
• Keywords: Finite Element Model (FEM), Grain Boundary, Grain Misorientation, Short Crack

References

[1] W. Ludwig, J.Y. Buffiere and S. Savelli: Acta Materia. Vol. 51 (2003), p.585.

[2] Y. Qiao: Mater. Sci. Eng. A Vol. 361 (2003), p.350.

[3] D. Sun, X. Sun: Acta Mech. Solida Sinica Vol. 23 (2002), p.5.

[4] C. Blochwitz, R. Richter: Mater. Sci. Eng. A Vol. 267 (1999), p.120.