用恒载荷法和慢应变速率法及SEM研究了Cu-Al-Be形 状记忆合金在甘油、海水和氨介质中的应力腐蚀性能.结果表明，Cu-Al-Be合金具有良 好的抗海水应力腐蚀性能和较低的氨介质应力腐蚀倾向.单相马氏体有较 好的耐海水腐蚀能力，可减少腐蚀引起的裂纹源；外应力下马氏体的孪晶变形和变体间的界 面迁移，则有利于松弛应力集中，阻碍和延缓腐蚀裂纹源的扩展，从而提高Cu-Al-Be合金的 应力腐蚀能力.
Comparing with ZHMn55-3-1 alloy,stress corrosion cra cking experiments on Cu-Al-Be SMAs in media of glycerol,sea water and ammonia we re carried out and the tensile fractures of experimental alloys were investigate d by SEM.The result was clear that Cu-Al-Be SMAs show a high resistance to stres s corrosion cracking,especially in sea water. Martensities have good ability aga inst corrosion in sea water and the twin deformation and motion of the interface s of the martensite variants is able to relieve stress concentration and delay t he extending of corrosion cracks.Both of them exert a contribution to improving the SCC character of Cu-Al-Be alloys.
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