Effect of whisker alignment on microstructure, mechanical and thermal properties of Mg-SiCw/Cu composite fabricated by a combination of casting and severe plastic deformation (SPD)

• DOI: 10.1016/j.jma.2022.11.004
• Publication Date: 2022-12-08T20:37:09Z
• Authors: Yinwei Wang; Moslem Tayyebi; Morteza Tayebi; Mahdireza Yarigar...; Shoufa Liu; Hongwei Zhang
• Keywords: Necking

In this research, microstructure evaluation, mechanical properties and thermal conductivity of the Mg-SiCw/Cu composite with laminar structure were investigated. For purpose, SiC whiskers added to magnesium alloy by using stir-casting, then Mg-SiCw was bonded copper layers warm accumulative roll bonding (ARB). Based on results optical microscopy (OM) scanning electron (SEM), well distributed in matrix they aligned parallelly when composites plastically deformed at higher rolling passes. Furthermore, all remained continuous localized necking sites. Also, no intermetallic compounds phases detected XRD EDS analyzes. Apart from significant effect severe plastic deformation properties, findings tests point usefulness reinforcements improving up 60% microhardness, Young's modulus, yield, 41% tensile strengths. Further, conductivities increased adding reinforcement above increasing number This growth is attributed diffusivity as conductive within composite.