Lee Seong-Hee, Lim Cha-Yong
J Nanosci Nanotechnol. 2014 Oct;14(10):8014-8. doi: 10.1166/jnn.2014.9470.
Accumulative roll-bonding (ARB) process using dissimilar copper alloys was performed up to six cycles (-an equivalent strain of 4.8) at ambient temperature without lubricant for fabrication of a new complex copper alloy. The dissimilar copper alloy sheets of oxygen free copper (OFC) and dioxide low-phosphorous copper (DLPC) with thickness of 1 mm were degreased and wire-brushed for the ARB process. The sheets were then stacked together and rolled by 50% reduction so that the thickness became 1 mm again. The sheet was then cut to the two pieces of same length and the same procedure was repeated up to six cycles. A new sound complex copper alloy sheet in which OFC and DLPC are combined each other was successfully fabricated by the ARB process. The tensile strength of the copper alloy increased with increasing the number of ARB cycles, reached 492 MPa after six cycles, which is about three times of the initial material. The average grain size was 12.6 μm after the 1st cycle, but it became 1.5 μm after six cycles. Microstructures and mechanical properties of the complex copper alloy fabricated by the ARB were investigated in detail.
采用不同的铜合金进行累积轧制复合（ARB）工艺，在无润滑的室温条件下进行了六个循环（等效应变为4.8），以制备一种新型复合铜合金。将厚度为1mm的无氧铜（OFC）和低磷二氧化铜（DLPC）异种铜合金板材进行脱脂和钢丝刷处理，用于ARB工艺。然后将板材堆叠在一起，轧制压下量为50%，使厚度再次变为1mm。然后将板材切成两段相同长度的板材，并重复相同的步骤直至六个循环。通过ARB工艺成功制备出一种OFC和DLPC相互结合的新型致密复合铜合金板材。铜合金的抗拉强度随着ARB循环次数的增加而提高，六个循环后达到492MPa，约为初始材料的三倍。第一个循环后平均晶粒尺寸为12.6μm，但六个循环后变为1.5μm。详细研究了通过ARB制备的复合铜合金的微观结构和力学性能。
