高强铝合金的应力腐蚀断裂

【作者】 刘继华； 李荻； 郭宝兰； 钱建刚；

【机构】 北京航空航天大学材料科学与工程系；

【摘要】 用慢应变速率拉伸（SSRT）技术测试了LC4和LY12CZ两种铝合金在3.5%NaCl溶液中的应力腐蚀断裂（SCC）行为。研究了应变速率、预浸泡对铝合金SCC行为的影响。试验结果表明,这两种材料都具有SCC敏感性。对于长横取向的LC4铝合金试样,在应变速率为1.331×10^-6s^-1时,其SCC敏感性大。对于LY12CZ铝合金试样,在3.5%NaCl溶液中预浸泡24h,与未经浸泡的试样相比,有较强的SCC敏感性。更多还原

【Abstract】 The stress corrosion cracking (SCC) behavior of LC4 and LY12CZ aluminum alloys in 3.5% NaCl solution has been tested using slow strain rate tension (SSRT) technique. The effect of strain rate and pre-immersion on the SCC behavior of the aluminum alloys has been studied. The experimental results show that these alloys are susceptible to SCC. LC4 aluminum alloy with L-T direction is more susceptible to SCC at a strain rate of 1.331×10- s-1. LY12CZ aluminum alloy pre-im-mersed for 12h in 3.5% NaCl solution is more susceptible to SCC than those without pre-immersion.更多还原