Microstructure Evolution of Directionally Solidified Al-25at.%Ni Peritectic Alloy
Microstructure evolution of peritectic Al-25at.%Ni alloy during directional solidification with pulling velocity ranging from 2 to 500m/s is investigated. The directional solidified alloy is composed of Al3Ni2, Al3Ni phase and eutectic (Al3Ni+Al) phase. When pulling velocity ranges from 2 to 5m/s, Al3Ni phase grows into an integral matrix. Majority of primary Al3Ni2 is consumed by peritecti reaction and transformation behind the peritectic interface with pulling velocity ranging from 2 to 20 m/s. While pulling rate increases, major Al3Ni phase direct solidifies from liquid. With cooling rate increasing, Al3Ni2 phase content firstly decreases and then increases, while the Al3Ni phase content decreases throughout.
Yansheng Yin and Xin Wang
Y. Q. Su et al., "Microstructure Evolution of Directionally Solidified Al-25at.%Ni Peritectic Alloy", Advanced Materials Research, Vols. 79-82, pp. 1655-1658, 2009