A Strain Modified 'Steady-State' Creep Relationship for High Strength Aluminium Alloy,
Abstract
The concept that creep response is the result of a transient approach to a minimum strain rate continuously modified by accumulating damage has been investigated using high precision creep data. It was considered that the accumulated creep strain might be some measure of internal damage and curves of log creep strain rate against creep strain are shown to exhibit linearity at higher strain levels consistent with these assumptions. A modified steady-state relationship has been derived and the variation of its two coefficients with stress and temperature explored. The effect of load and temperature history is illustrated by varying the prior heating time, by cyclic load testing and by step reductions in load level, and it is tentatively concluded that tests of these types may be correlated with the appropriate continuous creep test by using the modified steady-state relationship with corrections for differences in accumulated creep strain and time at temperature. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1976
- Accession Number
- ADA041584
Entities
People
- J. N. Webb