Effect of sample size on intermetallic Al2Cu microstructure and orientation evolution during directional solidification

Orientation and Microstructure Evolution of Al-Al2Cu Regular Eutectic Lamellar Bifurcating in an Abruptly Changing Velocity under Directional Solidification

“…Therefore, the Al/Al 2 Cu eutectic spacing adjustment was ongoing in three-dimensional space, which was different from the simple two-dimensional eutectic spacing adjustment. The above results indicated that the three-dimensional (3D) microstructure of eutectic phase in this work could be more clearly shown the eutectic lamellar growth process [20,22]. Through Al and Al 2 Cu phase continuous forking, the size of eutectic lamellar was obviously decreased and Al/Al 2 Cu eutectic spacing was also reduced rapidly.…”

“…The (100)-pole figure was taken the sample coordinate system (100) as the polar axis, and then investigated the orientation relationship of the crystal coordinate system in the sample coordinate system. Therefore, the growth direction of Al 2 Cu phase was its (001) direction [22], and the growth direction of the sample was (001) axial direction also the heat flow direction. It can be simply considered that when the cross-section of the left figure was the (100)-pole figure in Figure 3.…”

“…It is well known that the solidification microstructures of Al-33.2%Cu alloy consist of eutectic (Al/Al2Cu) based on the Al-Cu phase diagram. So the microstructure was regular eutectic lamellar at a pulling rate of 2 μm/s, which consisted of Al2Cu phase [22]. The size of eutectic lamellar was a little larger result in the larger lamellar spacing shown in left of Figure 1.…”

Influences of microstructure and orientation on fracture toughness of intermetallic phase Al2Cu‐based alloy under directional solidification

“…c and d. The fracture mode of directionally solidified sample was mainly transgranular fracture. Based on the previously mentioned result and the studies by Hamar et al and Gao et al, it can be inferred that the growth direction of Al 2 Cu phase was its [001] direction during directional solidification. Therefore, the cleavage plane was its (001) plane with the strong plane.…”

A Crystallographic Study on the Growth of Partially Faceted MnSn2 Phase during Solidification Process

“…Based on the atomic arrangement in different crystallographic planes, it was concluded that their growth morphologies are, in a large part, determined by their structures. For the tetragonal crystals with the c-axes shorter than the a-axes, like CuAl 2 (a = 6.067 Å and c = 4.877 Å [11]) [12] and CoSn 2 (a = 6.363 Å and c = 5.456 Å [13]) [14], it has been shown that they usually form an elongated shape due to the preferential growth along the <001> direction. However, there are few studies that connect their growth morphologies with the internal structures.…”