首页> 外文会议>NACE annual conference exposition >A COMPARISON STUDY OF STRESS CORROSION CRACK GROWTH RATES FOR AA7XXX ALLOYS AS A FUNCTION OF BULK AQUEOUS CHLORIDE CONCENTRATIONS AND SIMULATED CRACK TIP CHEMISTRIES
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A COMPARISON STUDY OF STRESS CORROSION CRACK GROWTH RATES FOR AA7XXX ALLOYS AS A FUNCTION OF BULK AQUEOUS CHLORIDE CONCENTRATIONS AND SIMULATED CRACK TIP CHEMISTRIES

机译:AA7xxx合金作为氯化物水溶液浓度和模拟裂纹尖畴的应力腐蚀裂纹扩大率的比较研究及模拟裂纹尖端化学

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Various alloys are being considered for drop-in replacement and refurbishment of corrosion and stress corrosion cracking prone AA7075-T6 (UNS A97075) components on aging military aircraft. This project evaluates three candidate aluminum alloys that meet mechanical property requirements and are thought to be superior to AA7075-T6 in terms of corrosion performance. The three alloys tested include AA7150-T7751 (UNS A97150), AA7249-T76511, and AA7040-T7651. Environmentally assisted crack growth rates for these alloys were documented and compared to those of AA7075-T6 and AA7075-T73 in various bulk aqueous chloride environments. A study was also performed to elucidate the mechanistic importance of critical crack tip chemistries on the stress corrosion cracking behavior of these 7XXX series alloys.
机译:各种合金正在考虑用于在老化军用飞机上的腐蚀和腐蚀腐蚀和腐蚀和应力腐蚀裂缝的腐蚀和应力腐蚀裂缝的腐蚀和应力腐蚀的裂缝易腐蚀和翻新.Prone AA7075)组分。该项目评估了三个候选铝合金,符合机械性能要求,并被认为在腐蚀性能方面优于AA7075-T6。测试的三种合金包括AA7150-T7751(UNS A97150),AA7249-T76511和AA7040-T7651。这些合金的环保辅助裂纹生长速率被记录并与各种散氯环境中AA7075-T6和AA7075-T73的环境促进。还进行了一项研究以阐明临界裂纹尖端化学物理的重要性对这些7xxx系列合金的应力腐蚀开裂行为。

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