摘要
为了研究固溶原子、析出相粒子和冷变形对Al-Sc-Zr合金组织和性能的影响,对连续流变挤压制备的Al-Sc-Zr合金进行形变热处理,采用电导率、强度、显微硬度测试以及光学显微镜、TEM、STEM对合金在不同处理状态下的显微组织和性能进行研究。建立固溶原子、析出相粒子和冷变形对合金导电率定量贡献的数学模型。结果表明:固溶、时效和冷变形都能使合金的强度得到显著的提升,而固溶原子、沉淀粒子和冷变形对Al合金导电率影响值分别是10.5%(IACS)、2.3%(IACS)和0.5%(IACS)。时效和冷变形处理是获得高强高导铝合金导线的关键。
In order to investigate the effects of solid solution atoms, precipitated particles and cold deformation on the microstructures and properties of Al-Sc-Zr alloys, the Al-Sc-Zr alloys prepared by continuous rheo-extrusion were treated by thermomechanical treatment, analyzed for conductivity and mechanical properties by tensile and microhardness testing, and characterized using optical microscope, TEM and STEM. A mathematical model was established to quantitatively characterize the contribution of solid solution atoms, precipitates and cold deformation to the conductivity of the alloy. The results show that the strength of Al alloy can be significantly improved by solid solution, aging and cold deformation, and the quantitative impacts of solution atoms, precipitates and cold deformation on the conductivity of Al alloy are 10.5%(IACS), 2.3%(IACS) and 0.5%(IACS), respectively. Aging and cold deformation treatments are the keys to obtain high-strength and high-conductivity aluminum alloy wires.
引文
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