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材料工程  2015 

腐蚀环境对预腐蚀铝合金腐蚀疲劳性能的影响

DOI: 10.11868/j.issn.1001-4381.2015.02.015, PP. 91-95

Keywords: 预腐蚀,铝合金,腐蚀环境,腐蚀疲劳

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Abstract:

采用不同环境下的轴向加载疲劳性能测试方法,研究了不同环境对预腐蚀7XXX铝合金腐蚀疲劳性能的影响.结果表明腐蚀环境对其疲劳寿命的影响从重到轻依次是油箱积水、盐水、潮湿空气和实验室空气.当应力比R为0.5和0.06时,潮湿空气下的疲劳寿命比实验室空气下的略低,降低的幅度随着应力的降低而增大;在低应力水平区盐水和油箱积水环境对疲劳寿命的影响基本相同.当应力比R为-1时,盐水下的疲劳寿命总是略低于油箱积水环境下的疲劳寿命;潮湿空气相比实验室空气下的疲劳寿命随着应力的降低,降低的幅度比应力比为0.5和0.06时要略大.

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