Microstructural characterization of 2124 Al-SiC{sub W} composite
- Pohang Univ. of Science and Technology (Korea, Republic of). Center for Advanced Aerospace Materials
The aluminum matrix composites reinforced with SiC{sub W} (Al-SiC{sub W}) generally have high elastic modulus and strength combined with light weight, providing a potentially wide range of applications, especially in the automotive and aerospace industries. However, the Al-SiC{sub W} composites exhibit low ductility and fracture toughness. Such unfavorable fracture-related properties restrict the wider application of Al-SiC{sub W} as the structural components. From the in-situ SEM observation of fracture process of the 2124Al-SiC{sub W} composites, it has been shown these coarse particles are cleaved first to form microcracks at a relatively low stress level and at as local stress concentrators which facilitate the void formation at the nearby whisker end. The existence of coarse particles consequently resulted in low ductility and fracture toughness of the 2124Al-SiC{sub W} composites processed by PM route. Despite the importance of these coarse particles in the fracture process of Al-SiC{sub W} composites, however, their nature is not yet clear. The present study is aimed at characterizing the coarse particles present in PM processed 2124Al-SiC{sub W} composite. The main techniques used were convergent beam electron diffraction (CBED) and energy dispersive X-ray spectroscopy (EDS).
- OSTI ID:
- 474221
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 9 Vol. 36; ISSN 1359-6462; ISSN SCMAF7
- Country of Publication:
- United States
- Language:
- English
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