Effect of Non-isothermal Regression and Re-aging on Microstructure and Properties of 7055 Aluminum Alloy
In this paper,7055 aluminum alloy is taken as the research object.Through TEM,mechanical property test,corrosion resistance test and other experimental means,the effect of heating rate on the microstructure and properties of the alloy in the non-isothermal regression progress is explored.The regression heating rate is set at 40℃/h,60℃/h,600℃/h,and the heating cutoff temperature is 180℃.The results show that when the non-isothermal regression reaging process is(120℃×24 h)+(60℃/h→180℃)+(120℃×24 h),the tensile strength of 7055 aluminum alloy is higher than that of T6,the yield strength is 641 MPa and the elongation is 14%.After regression reaging at 60℃/h,the precipitates in the grain are dispersed and dispersed,the precipitates in the grain boundary are arranged intermittenously,and the precipitation-free zone(PFZ)in the grain boundary is obvious.The stripping corrosion performance is rated EA,and the corrosion resistance is excellent.
7055 aluminum alloynon-isothermal regression and re-aging processheating ratemechanical propertiescorrosion resistance
万方数据
维普
