Effects of temperature on the superplastic characteristics of a powder metallurgy pure aluminum

Journal Article · Fri Nov 15 04:00:00 EST 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(96)00288-6· OSTI ID:415380

Imai, T ^[1]; Kojima, S ^[2]; L`Esperance, G; Hong, B D ^[3]; Jiang, D ^[4]; Nieh, T G ^[5]

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1. National Industrial Research Inst. (Japan)
2. Nagoya Municipal Industrial Research Inst. (Japan)
3. Ecole Polytechnique de Montreal, Quebec (Canada)
4. Harbin Inst. of Tech. (China)
5. Lawrence Livermore National Lab., CA (United States)

High Strain Rate Superplasticity (HSRS) is expected to establish an efficient near-net shape forming process for metal matrix composites and mechanically alloyed(MA) aluminum alloys. It is of interest to clarify the deformation mechanism, because the optimum strain rate at which a maximum elongation of 300--600% is obtained is larger by 10--1,000 times than that of conventional superplastic aluminum alloys. Thus, the deformation mechanism of HSRS materials is thought to be different from that of conventional alloys. The purpose of this study is to develop a thermomechanical process to produce superplasticity at high strain rate (HSRS) for 1N90 pure aluminum, and also to examine the deformation mechanism of the HSRS.

• OSTI ID: 415380
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 10 Vol. 35; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
DEFORMATION
ELONGATION
GRAIN BOUNDARIES
INTERFACES
LIQUIDS
PLASTICITY
STRAIN RATE
TEMPERATURE DEPENDENCE
THERMOMECHANICAL TREATMENTS