Effects of solution treatment on tensile properties and strengthening mechanisms of SiCp/6061Al composites fabricated by powder thixoforming
作者： X.Z. Zhang , T.J. Chen , Y.H. Qin
DOI: 10.1016/J.MATDES.2016.03.068
关键词:
摘要: Abstract 6061 Al-based composites reinforced with 10% volume fractions of 6.94 μm SiC particles (SiCp) have been fabricated by powder thixoforming, and the effects solution treatment on their tensile properties strengthening mechanisms were investigated. The obtained results indicate that addition SiCp significantly improved strength a Al matrix alloy, but reduced its ductility. ultimate yield strengths alloy increased from 180 MPa 99 MPa to 230 MPa 128 MPa, respectively, while elongation decreased 8.0% 2.6%. However, at 535 °C for 6 h alleviated ductility losses further enhanced composite strength; as result, strength, 19.6%, 65.2%, 161.5% up 275 MPa, 212 MPa, 6.8%, respectively. Due presence SiCp, resulting rate was noticeably compared alloy. relationship between time discussed theoretically using modified micromechanical model, which took into account failure. theoretical in good agreement experimental ones.
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