摘要
采用双悬臂梁试样,实验研究了IncoMAP Al-9052合金在3.5％NaCl溶液中的应力腐蚀开裂(SCC)行为。结果表明该种合金的裂纹扩展机制有别于常规的铝合金。其初期阶段的裂纹扩展过程可划分为三个阶段,在每一阶段的裂纹扩展机制可能是不同的,但其裂纹扩展的主要机制为氢脆。
Stress corrosion cracking(SCC) behavior of high strength aluminum alloys has been studied extensively. Various mechanisms including anodic dissolution, hydrogen embrittlement, passivating film tear, and so on, were proposed to explain their SCC behavior. IncoMAP alloy Al-9052 is an Al-Mg alloy manufactured by mechanical alloying process. It has considerable potential for the material development because of its light weight, high strength and excellent corrosion resistance. However, few researches have been done on SCC behavior of the aluminum alloy. This study focused to evaluate the initial stage of its SCC behavior using Double-Cantilever-Beam (DCB) specimen in 3.5% NaCl solution. The results suggested that the crack propagation behavior of the alloy was different from that of normal aluminum alloys. At initial stage, the crack propagation process could be divided into three steps with various mechanisms. Nevertheless, hydrogen embrittlement dominated its SCC.
出处
《中国腐蚀与防护学报》
CAS
CSCD
1998年第2期136-140,共5页
Journal of Chinese Society For Corrosion and Protection
关键词
应力腐蚀开裂
氢脆
铝合金
氯化钠
IncoMAP alloy, Stress corrosion cracking, Hydrogen embrittlement
