Age-hardening characteristic of an Al-Zn-Mg-Cu alloy produced by spray deposition  

作　　者：WANG Feng XIONG Baiqing ZHANG Yongan ZHU Baohong LIU Hongwei ZHANG Zhihui WANG Zixing 

机构地区：[1]State Key Laboratory for Fabrication and Processing of Nonferrous Metals, Beijing General Research Institute for Nonferrous Metals, Beijing 100088, China

出　　处：《Rare Metals》2007年第2期163-168,共6页稀有金属（英文版）

基　　金：This work was financially supported by the Major State Basic Research Development Program of China (No. 2005CB623704).

摘　　要：Al-10.8Zn-2.8Mg-1.9Cu alloy was synthesized by spray atomization and deposition technique. GP zones and age-hardening process in the alloy were investigated using high-resolution electron microscopy （HREM）, selected area diffraction （SAD）, and differential scanning calorimetry （DSC） analysis. The results indicated that spray deposition process accelerated the aging kinetics of the alloy at an aging temperature of 120℃, thereby reducing the peak aging time to 16 h. GPⅠ and GPⅡ are the two types of zones that are major precipitates for the alloy under peak-aged condition. The precipitation sequence for the alloy is also discussed.Al-10.8Zn-2.8Mg-1.9Cu alloy was synthesized by spray atomization and deposition technique. GP zones and age-hardening process in the alloy were investigated using high-resolution electron microscopy （HREM）, selected area diffraction （SAD）, and differential scanning calorimetry （DSC） analysis. The results indicated that spray deposition process accelerated the aging kinetics of the alloy at an aging temperature of 120℃, thereby reducing the peak aging time to 16 h. GPⅠ and GPⅡ are the two types of zones that are major precipitates for the alloy under peak-aged condition. The precipitation sequence for the alloy is also discussed.

关 键 词：aluminium alloy PRECIPITATION GP zone spray deposition 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG174.442[金属学及工艺—金属材料]