Superplasticity of Spray Deposited 5083 Al-Mg Alloy  

喷射沉积5083Al-Mg合金的超塑性(英文)

作　　者：杨守杰 李树索 戴圣龙 韩雅芳 

机构地区：[1]Beijing Institute of Aeronautical Materials [2]School of Materials Science and Engineering,Beijing University of Aeronautics and Astronautics

出　　处：《Chinese Journal of Aeronautics》2004年第1期47-52,共6页中国航空学报（英文版）

基　　金：NationalNaturalScienceFoundationofChina (5 98810 0 5 )

摘　　要：The superplasticity of spray deposited and thermomechanical processed 5083Al-Mg alloy is investigated in this paper. The results show that spray deposited 5083 Al exhibits anequiaxed grain morphology with an average size of 15 m and porosity in the range of 0.1 vol. % to 5vol. % . Two distinct TMP procedures are employed to close porosity and refine grain size:extrusion plus rolling and direct rolling. The material processed using the former method exhibits arelatively high superplasticity with a maximum superplastic elongation of 465 % , whereas thatprocessed using the latter method exhibits a maximum superplastic elongation of 295 % . Materialsprocessed using extrusion plus rolling and direct rolling both exhibit similar stress-strainbehavior and strain rate sensitivity factors. The strain rate factors are in the 0.3 to 0.5 range.The difference in their superplastic elongation is possibly the result of differences in grain sizeand available cavity nucleation sites provided by closed gas pores.The superplasticity of spray deposited and thermomechanical processed 5083Al-Mg alloy is investigated in this paper. The results show that spray deposited 5083 Al exhibits anequiaxed grain morphology with an average size of 15 m and porosity in the range of 0.1 vol. % to 5vol. % . Two distinct TMP procedures are employed to close porosity and refine grain size:extrusion plus rolling and direct rolling. The material processed using the former method exhibits arelatively high superplasticity with a maximum superplastic elongation of 465 % , whereas thatprocessed using the latter method exhibits a maximum superplastic elongation of 295 % . Materialsprocessed using extrusion plus rolling and direct rolling both exhibit similar stress-strainbehavior and strain rate sensitivity factors. The strain rate factors are in the 0.3 to 0.5 range.The difference in their superplastic elongation is possibly the result of differences in grain sizeand available cavity nucleation sites provided by closed gas pores.

关 键 词：SUPERPLASTICITY spray deposition 5083 Al-Mg alloy thermomechanicalprocess MICROSTRUCTURE 

分 类 号：TF125[冶金工程—粉末冶金]