QAl9-2合金脱铝腐蚀的TEM研究  

TEM observation on dealuminification corrosion of QAl9-2 alloy in marine environment

作　　者：韩忠[1] 赵晖[2] 林海潮[1] 

机构地区：[1]中国科学院金属研究所快速凝固非平衡合金国家重点实验室,沈阳110015 [2]沈阳工业学院材料科学与工程系,沈阳110015

出　　处：《中国有色金属学报》2001年第3期428-432,共5页The Chinese Journal of Nonferrous Metals

摘　　要：针对QAl9 2合金在海洋环境中亚稳 β1相优先脱铝腐蚀的问题 ,利用TEM ,EDX以及XRD分析 ,对其发生脱铝和未发生脱铝的区域进行了细致的研究。结果表明 ,QAl9 2合金的脱铝腐蚀与亚稳 β1相的马氏体相变有关 ,腐蚀优先发生在相变产物片状 β′1相区 ,β′1马氏体相的优先腐蚀是由有序的DO3 结构及其内部存在的大量层错造成的。In view of preferential dealuminification corrosion of metastable β 1 phase, QAl9 2 alloy before and after dealuminification in marine environment was studied by TEM, EDX and XRD analysis. It was indicated that the dealuminification corrosion of QAl9 2 alloy is associated with martensite transformation of metastable β 1 phase, and occurs within the transformation products, β ′ 1 martensite plates. The reason is that there are DO 3 structure and a large amount of stacking faults in the β ′ 1 martensite plates. Micro pits and aluminum rich fine corrosion products were also observed by TEM. [

关 键 词：铜合金 脱铝腐蚀 TEM 

分 类 号：TG172[金属学及工艺—金属表面处理] TG146.11[金属学及工艺—金属学]