Distribution of microstructure and cooling rate in Al-Al2Cu functionally graded materials fabricated by a centrifugal method

作者：Watanabe Yoshimi; Hattori Yuko; Sato Hisashi^*

来源：Journal of Materials Processing Technology, 2015, 221: 197-204.

DOI：10.1016/j.jmatprotec.2015.01.028

• Functionally graded materials (FGMs)
• Microstructures
• Casting
• Cooling rate

Effects of processing parameters, such as type of caster, casting atmosphere and G number, on distributions of microstructure and cooling rate in Al-Al2Cu functionally graded materials (FGMs) by centrifugal casting are investigated. The Al-Al2Cu FGMs samples fabricated under vacuum have relatively steeper distribution profiles of the Al2Cu volume fraction rather than samples fabricated under gas atmosphere. Moreover, gradient of the Al2Cu volume fraction distribution in the FGMs sample becomes larger with increasing G number. As well as the Al2Cu volume fraction, lamella spacing in Al-Al2Cu eutectic lamella structure is influenced by these processing parameters. These microstructural distributions in the Al-Al2Cu FGMs samples can be explained by cooling rate distribution in the samples during centrifugal casting. Using the Al-Al2Cu eutectic lamella structure and the Al2Cu volume fraction, the cooling rate distributions in the FGMs samples are roughly estimated.

• 出版日期2015-7