Recrystallization and grain growth phenomena in a particle-reinforced aluminum composite

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Metallurgical Transactions, A

DOI:https://doi.org/10.1007/BF02647590· OSTI ID:78409

Aken, D.C. van ^[1]; Krajewski, P E ^[2]; Vyletel, G M; Allison, J E ^[3]; Jones, J W ^[4]

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1. Univ. of Missouri, Rolla, MO (United States). Dept. of Metallurgical Engineering
2. General Motors Corp. Warren, MI (United States). Research and Development Center
3. Ford Motor Co., Dearborn, MI (United States). Ford Research Lab.
4. Univ. of Michigan, Ann Arbor, MI (United States)

Recrystallization and grain growth in a 2219/TiC/15p composite were investigated as functions of the amount of deformation and deformation temperature. Both cold and hot deformed samples were annealed at the normal solution treatment temperature of 535 C. It was shown that large recrystallized grain diameters, relative to the interparticle spacing, could be produced in a narrow range of deformation for samples cold-worked and those hot-worked below 450 C. For cold-worked samples, between 4 to 6 pct deformation, the recrystallized grain diameters varied from 530 to 66 {mu}m as the amount of deformation increased. Subsequent grain growth was not observed in these recrystallized materials and noncompact grain shapes were observed. For deformations greater than 15 pct, recrystallized grain diameters less than the interparticle spacing were observed and subsequent grain growth produced a pinned grain diameter of 27 {mu}m. The pinned grain diameter agreed well with an empirical model based on three dimensional (3-D) Monte Carlo simulations of grain growth and particle pinning a two-phase material. Tensile properties were determined as a function of grain size, and it was shown that grain size has a weak influence on yield strength. A maximum in the yield strength was observed at a grain size larger than the normal grain growth and particle-pinned diameter.

• Sponsoring Organization: USDOE
• OSTI ID: 78409
• Journal Information: Metallurgical Transactions, A, Journal Name: Metallurgical Transactions, A Journal Issue: 6 Vol. 26; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
COLD WORKING
COMPOSITE MATERIALS
GRAIN GROWTH
MECHANICAL PROPERTIES
RECRYSTALLIZATION
TEMPERATURE DEPENDENCE
TITANIUM CARBIDES