Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 578, Issue -, Pages 323-330Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2013.04.113
Keywords
Spark plasma sintering; Aluminum-silicon alloys; Coating; Cladding; Powder metallurgy
Categories
Funding
- ALCOA
- McGill University
- Regroupment Aluminium (REGAL)
- Natural Sciences and Engineering Research Council (NSERC)
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A eutectic Al-Si cladding was formed on the surface of a wrought aluminum alloy 7075. The cladding was formed by simultaneous sintering and joining of the powder to the substrate surface. Interfacial strength and properties of the cladding were investigated, as well as the effect of sintering on the substrate properties. A minimum thickness of 1 mm for the cladding process was found in order to maintain the mechanical properties. During sintering, diffusion of Si, Zn, Mg and Cu across the interface occurred, upwards of 200 mu m into the cladding. The sintering process resulted in a drop in the hardness of the substrate, which was recoverable by solutionizing and subsequent artificial aging. Three-point bending was used to test the strength of the interface formed between the two materials and an average flexural strength was determined to be 260 +/- 31 MPa with an average strain to failure of 0.36 +/- 0.09%. (C) 2013 Elsevier B.V. All rights reserved.
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