Flow softening during high temperature deformation of Nb-Lo a/o Si in-situ composite. Journal pub
This paper discusses the mechanism of flow softening occurring during high temperature deformation of Nb-10 a/o Si in-situ composite. It was observed that flow curves for Nb-10 a/o Si in-situ composite during high temperature deformation exhibit initial work hardening followed by pronounced flow softening. The flow softening observed in this system increases with increasing temperature and decreasing strain rate. Microstructural evolution during the high temperature deformation of Nb-10 a/o Si alloy indicated that substructure coarsening in the Nb and Nb3Si phases is the primary mechanism responsible for the shape of the flow curve. The average subgrain size was found to increase with increasing temperature, decreasing strain rate, and increasing strain, in both the Nb and Nb3Si phases.
- Research Organization:
- Wright State Univ., Dayton, OH (United States). Dept. of Mechanical and Materials Engineering
- OSTI ID:
- 285156
- Report Number(s):
- AD-A--307782/3/XAB; CNN: Contract AFOSR-90-0204
- Country of Publication:
- United States
- Language:
- English
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