Journal
SCRIPTA MATERIALIA
Volume 114, Issue -, Pages 56-59Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.11.018
Keywords
Metal matrix composites; Microstructure; Compression; Interfacial strength; Deformation structure
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Funding
- National Basic Research Program (973 Program) [2012CB619600]
- National Natural Science Foundation of China [51131004, 51471190]
- Science and Technology Committee of Shanghai Municipality [15JC1402100, 13PJ1404000, 14DZ2261200, 14520710100]
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A comprehensive understanding of the interfacial properties in particle-reinforced metal matrix composites (PRMMCs) requires an accurate determination of the cohesive strength of the interface. In this study, micro pillars containing a slanted SiC/Al interface were fabricated, and were tested by uniaxial compression. The interfacial shear strength was found to be 133 +/- 26 MPa, consistent with values predicted by numerical simulations. The stress-strain response of the composite pillars was characterized by shorter strain bursts and more significant strain hardening, as compared with their monolithic Al counterparts. These observations were interpreted by grain fragmentation and dislocation pile-up at the SiC/Al interface upon deformation. (C) 2015 Elsevier Ltd. All rights reserved.
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