High-strength and highly-uniform composites produced by compocasting and cold rolling processes

作者：Amirkhanlou Sajjad^*; Rezaei Mohammad Reza; Niroumand Behzad; Toroghinejad Mohammad Reza

来源：Materials & Design, 2011, 32(4): 2085-2090.

DOI：10.1016/j.matdes.2010.11.046

• Metal matrix composites
• Mechanical
• Microstructure

Silicon carbide reinforced aluminum alloy composite materials produced by casting methods are increasingly used in many engineering fields. However, these materials suffer from poor distribution of the reinforcement particles in the matrix and high content of porosity. The effect of subsequent cold rolling process with different reductions on the porosity, microstructure and mechanical properties of cast A16061/10 vol.% SiC(p)composite was investigated in this study. Composites fabricated by compocasting method were rolled at five different reductions of 30, 60, 75, 85 and 95%. The rolled specimens exhibited reduced porosity as well as a more uniform particle distribution when compared with the as-cast samples. Microscopic investigations of the composites after 95% reduction showed an excellent uniform distribution of silicon carbide particles in the matrix. During cold rolling process it was observed that the tensile strength and ductility of the samples increased by increasing the reduction content. After 95% reduction, the tensile strength and elongation values reached 306.7 MPa and 7.9%, which were 4.6 and 3.3 times greater than those of the as-cast composite, respectively.

• 出版日期2011-4