Thermomechanical treatment of super high strength Cu-8.0Ni-1.8Si alloy
来源期刊：中国有色金属学报(英文版)2007年增刊第1期(Part ⅡB)
论文作者：潘志勇 汪明朴 李周 肖柱 陈畅
文章页码：1076 - 1080
Key words：Cu-8.0Ni-1.8Si alloy; thermomechanical treatment; spinodal decomposition; ordering
Abstract: The microstructures and properties of Cu-8.0Ni-1.8Si alloy subjected to different heat treatments were examined by mechanical and electrical properties measurements, optical and transmission electron microscopes observation. The results show that the precipitation process during aging can be accelerated by the cold deforming before aging. As the Cu-8.0Ni-1.8Si alloy is subjected to solution treatment at 970 ℃ for 4 h, cold rolling to 60% reduction, and then aging at 450 ℃ for 60 min, its properties are σb=1 050 MPa, σ0.2=786 MPa, δ=3.2% and conductivity 27.9%(IACS). The strengthening mechanisms of the alloy include spinodal decomposition strengthening, ordering strengthening and precipitation strengthening. The precipitation of the alloy is nano-scale Ni2Si phase.
基金信息：Doctoral Fund of the Ministry of Education, China
