The effect of matrix microstructure on cyclic response and fatigue behavior of particle-reinforced 2219 aluminum. Part 1: Room temperature behavior
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
- Ford Motor Co., Dearborn, MI (United States). Ford Research Labs.
- Univ. of Missouri, Rolla, MO (United States). Dept. of Metallurgical Engineering
The low-cycle and high-cycle fatigue behavior and cyclic response of naturally aged and overaged 2219/TiC/15p and unreinforced 2219 Al were investigated using plastic strain-controlled and stress-controlled testing. In addition, the influence of grain size on the particle-reinforced materials was examined. In both reinforced and unreinforced materials, the naturally aged conditions were cyclically unstable, exhibiting an initial hardening behavior followed by an extended region of cyclic stability and ultimately a softening region. The overaged reinforced material was cyclically stable for the plastic strains examined, while the overaged unreinforced material exhibited cyclic hardening at plastic strains greater than 2.5 {times} 10{sup {minus}4}. Decreasing grain size of particle-reinforced materials modestly increased the cyclic flow stress of both naturally aged and overaged materials. Reinforced and unreinforced materials exhibited similar fatigue life behaviors; however, the reinforced and unreinforced naturally aged materials had superior fatigue lives in comparison to the overaged materials. Grain size had no effect on the fatigue life behavior of the particle-reinforced materials. The fatigue lives were strongly influenced by the presence of clusters of TiC particles and exogenous Al{sub 3}Ti intermetallics.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 205248
- Report Number(s):
- CONF-940204--
- Journal Information:
- Metallurgical Transactions, A, Journal Name: Metallurgical Transactions, A Journal Issue: 12 Vol. 26; ISSN MTTABN; ISSN 0360-2133
- Country of Publication:
- United States
- Language:
- English
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