摘要
采用拉伸力学性能测试、金相观察、SEM和EDS等方法研究了固溶温度与时间对Al-9．8Zn-2.37Mg-2．22Cu-0．12Zr铝合金微观组织、拉伸性能及断口形貌的影响。结果表明,固溶时间过短或温度过低,可溶第二相粒子难以充分回溶到基体中去,不利于发挥合金的时效强度潜力;而固溶温度过高或时间过长则易导致试样过烧。能谱分析表明,在固溶处理过程中发生溶解的粒子主要为AlZnMgCu型化合物,而残留的粗大第二相粒子则主要是含Fe化合物。固溶处理后残留的粗大第二相粒子数量和再结晶程度共同影响着拉伸断口形貌。
Effects of solution treatment parameters on microstructures, tensile properties and fractography of Al-9.8Zn-2.37Mg-2.22Cu- 0.12Zr alloy were studied by tensile testing, optical microscopy, SEM and EDS. The tensile testing and optical observation indicated that the insufficient solution time and lower solution temperature were not beneficial to the re-solution of soluble second phase particles into the matrix and increase the strength of the alloy after artificial ageing. The samples over-burned easily for too high solution temperature and long excessive time. The results of EDS showed the re-solved particles were AlZnMgCu type compounds containing Fe survived during solution treatment. It is found that the tensile fractography was affected by the volume fraction of residual particles and the recrystallization level of deformed grains.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第A02期386-390,共5页
Rare Metal Materials and Engineering
基金
国家"863"项目(2001AA332030)
关键词
固溶处理
超高强铝合金
微观组织
力学性能
solution treatment
ultrahigh strength aluminum alloy
microstructures
mechanical properties
