Lee Seong-Hee, Kim Jung Han
J Nanosci Nanotechnol. 2015 Jan;15(1):459-62. doi: 10.1166/jnn.2015.8363.
A nanostructure AA1050/AA6061 complex aluminum alloy was successfully fabricated by the accumulative roll-bonding (ARB) process. The ARB process was performed up to 5 cycles without a lubricant at ambient temperature. The samples fabricated by the ARB were the multi-layer complex aluminum alloys in which AA1050 and AA6061 layers are alternately stacked. The tensile strength of the samples increased with proceeding of the ARB, it reached about 300 MPa which is about twice that of the as-received AA6061. The grain size was greatly reduced to submicron order during the ARB, the efficiency of grain refinement was greater in AA6061 than AA1050. The tensile fracture surfaces showed a mixed morphology of brittle and ductile fracture. It was also found that a nanostructure multi-layer AA1050/AA6061 alloy fabricated by the ARB exhibited very complex microstructure and texture.
通过累积轧制复合（ARB）工艺成功制备了一种纳米结构的AA1050/AA6061复合铝合金。在室温下，在无润滑剂的情况下进行ARB工艺达5个循环。通过ARB制备的样品是多层复合铝合金，其中AA1050层和AA6061层交替堆叠。随着ARB工艺的进行，样品的抗拉强度增加，达到约300MPa，约为原始AA6061的两倍。在ARB过程中，晶粒尺寸大幅减小至亚微米级，AA6061中的晶粒细化效率高于AA1050。拉伸断口呈现出脆性和韧性断裂的混合形态。还发现，通过ARB制备的纳米结构多层AA1050/AA6061合金表现出非常复杂的微观结构和织构。
