The effect of subgrain size on the static recrystallization behavior of an aluminum-based metal-matrix composite
- Manchester Univ. (United Kingdom). Manchester Materials Science Centre
- Univ. of New South Wales, Kensington (Australia)
Static recrystallization (SRX) may occur following the hot deformation of metals. It is well known that in two-phase alloys recrystallization in cold-worked materials may occur by a process called particle stimulated nucleation (PSN). The aim of this paper is to examine the effect of the as-hot-worked microstructure of aluminum-based MMCs on the likelihood of subsequent SRX and to investigate the critical criterion for PSN in these materials. In summary, a metal matrix composite based on a 2014 aluminum matrix reinforced with a 20 vol.% of 15{micro}m diameter Al{sub 2}O{sub 3} particulates was hot worked under a range of temperatures from 300--500 C and strain rates from 10{sup {minus}2}--10{sup 0}s{sup {minus}1}. The unreinforced monolithic alloy was also studied for comparison. Following hot working both materials were subjected to heat treatment at 500 C for times up to 10{sup 6} seconds to study the kinetics of static recrystallization. The apparent nucleation rate of the hot worked materials during subsequent heat treatment at 500 C was determined using methods described elsewhere. Transmission electron microscopy was performed on the hot worked material to measure the subgrain size as a function of processing conditions.
- OSTI ID:
- 237843
- Journal Information:
- Scripta Metallurgica et Materialia, Vol. 33, Issue 6; Other Information: PBD: 15 Sep 1995
- Country of Publication:
- United States
- Language:
- English
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