The variation of torsional ductility of high-purity aluminum with temperature and strain rate
The torsional ductility of high-purity aluminum was measured over a wide temperature range (110-610)degree)C and at three strain rates (5.1 )times) 10/sup )minus/4), 1.3 )times) 10/sup )minus/2), and 5.1 )times) 10/sup )minus/1) s/sup )minus/1); several trends were noted that are only partially consistent with earlier work in this area. At each strain rate, the ductility or strain-to-failure first increases with increasing temperature, followed by decreases beyond a ''peak ductility'' at a ''peak temperature.'' The peak ductility and peak temperature appear to increase with strain rate. It appears that the lower-temperature ductility trends can be explained by increasing dynamic recovery processes that retared cracking and produce increasing ductility, while at higher temperature diffusive pore formation reduces the ductility. 20 refs., 3 figs
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5256921
- Report Number(s):
- UCRL-98000; CONF-880564-1; ON: DE88005618
- Resource Relation:
- Conference: 22. Associazione Italiana di Metallurgie Convention, Bologna, Italy, 17 May 1988
- Country of Publication:
- United States
- Language:
- English
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