Effect of reinforcement size on low cycle fatigue behavior of SiC particle reinforced aluminum matrix composites

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(95)00281-Y· OSTI ID:105952

Han, N L; Wang, Z G; Sun, L ^[1]

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1. Academia Sinica, Shenyang (China). State Key Lab. for Fatigue and Fracture of Materials

From the examination of the particle size effect on the cyclic deformation in SiC/Al composites, the authors offer the following conclusions: SiCp/Al composite displayed continuous cyclic softening after initial hardening for any two or three cycles. In contrast, the unreinforced matrix showed initial cyclic hardening, cyclic stability and second hardening. Higher stress in response to a given strain amplitude were observed with the composite with fine (10 {micro}m) SiC particles in comparison with the composite with coarse (32 {micro}m) SiC particles. In addition, the evolution of cyclic softening became faster when the particle size increased. The low cycle fatigue endurance of the composites was generally lower than that of the unreinforced matrix. The decrease in particle size led to a higher fatigue resistance at lower strain amplitudes, but reduced the fatigue life at higher strain amplitudes. The particle size effect on cyclic response behavior can be explained when the difference in interparticle spacing and thus the difference in plastic deformation ability between the coarse and fine particle composites are taken into account. The particle size effect on fatigue-life behavior was explained in terms of the fracture modes.

• OSTI ID: 105952
• Journal Information: Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 5 Vol. 33; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
COMPOSITE MATERIALS
CRACK PROPAGATION
FATIGUE
FRACTURE PROPERTIES
PARTICLE SIZE
PLASTICITY
SCANNING ELECTRON MICROSCOPY
SILICON CARBIDES
STRAINS
STRESSES
VOIDS