Fabrication of Iron-Base Shape Memory Alloy Fiber Reinforced Aluminum by Spark Plasma Sintering
Aluminum was composited with iron-base shape memory alloy (SMA) fiber. It is important to join between matrix metal and reinforced SMA fiber successfully. Matrix metal can obtain compressive residual stress caused by shape memory effect of SMA fiber without strong interface. In this study, aluminum matrix composite reinforced by iron-base SMA fiber was fabricated by Spark Plasma Sintering (SPS). At this method, sintering of hard-to-sinter materials (Al and Ti), junction of flame bonding materials is easy. The pure aluminum powder with iron-base SMA fiber was joined at 773K. As a result, intermetallic phase was formed at the interface between aluminum and iron-base SMA fiber and it was clarified that the interfacial strength depends on kind and thickness of intermetallic phase. This strong interface gives beneficial residual stress into aluminum from SMA fiber.
H.K. Chikwanda and S. Chikosha
Y. Komiya et al., "Fabrication of Iron-Base Shape Memory Alloy Fiber Reinforced Aluminum by Spark Plasma Sintering", Materials Science Forum, Vols. 828-829, pp. 152-157, 2015