Strain rate dependence of the flow stress and work hardening of single crystals of Ni{sub 3}(Al,Hf)B
Conference
·
OSTI ID:72462
- Univ. of Oxford (United Kingdom). Dept. of Materials
The strain rate sensitivity {beta} of the flow stress {tau} is associated with work hardening and {beta} = ({delta}{tau}/{delta}ln {dot {var_epsilon}}) is proportional to the work hardening increment {tau}{sub h} = {tau} {minus} {tau}{sub y}, where {tau}{sub y} is the strain rate independent yield stress. The temperature dependence of {beta}/{tau}{sub h} reflects changes in the rate controlling mechanism. At intermediate and high temperatures, the hardening correlates with the density of [{bar 1}01] dislocations on (010). The nature of the local obstacles at room temperature is not established.
- OSTI ID:
- 72462
- Report Number(s):
- CONF-941144--; ISBN 1-55899-265-0
- Country of Publication:
- United States
- Language:
- English
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