盐水环境对预腐蚀铝合金腐蚀疲劳性能的影响
采用预腐蚀7XXX铝合金Kt=1和K=3试件进行了实验室空气环境和盐水环境下的疲劳寿命实验，研究了盐水环境对预腐蚀7XXX铝合金疲劳性能的影响．结果表明，盐水环境显著降低了预腐蚀7XXX铝合金的疲劳性能，在实验室空气环境中疲劳寿命的分散性变大，应力水平越低越分散。K=1时在高应力水平上，盐水环境下疲劳寿命降低不多，是空气环境疲劳寿命的22．71％，而在低应力水平上盐水环境的疲劳寿命降低显著，是其空气环境疲劳寿命的2．22％。K=3时的盐水疲劳寿命在不同应力水平上的降低几乎相当。...
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| Published in: | 航空材料学报 Vol. 32; no. 3; pp. 73 - 78 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | Chinese |
| Published: |
沈阳航空航天大学航空制造工艺数字化国防重点学科实验室,沈阳,110136
2012
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | 采用预腐蚀7XXX铝合金Kt=1和K=3试件进行了实验室空气环境和盐水环境下的疲劳寿命实验，研究了盐水环境对预腐蚀7XXX铝合金疲劳性能的影响．结果表明，盐水环境显著降低了预腐蚀7XXX铝合金的疲劳性能，在实验室空气环境中疲劳寿命的分散性变大，应力水平越低越分散。K=1时在高应力水平上，盐水环境下疲劳寿命降低不多，是空气环境疲劳寿命的22．71％，而在低应力水平上盐水环境的疲劳寿命降低显著，是其空气环境疲劳寿命的2．22％。K=3时的盐水疲劳寿命在不同应力水平上的降低几乎相当。 |
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| Bibliography: | HUI Li, ZHOU Song, XU Liang, MA Shao-hua, WANG Yan, ZHANG Ying-ying （ State key laboratory for Aviation digital manufacturing process, Shenyang Aerospace University, Shenyang 110136, China） 11-3159/V pre-corrosion; saline environment; fatigue ; corrosion fatigue ; aluminum alloy The influence of saline environment on fatigue property of pre-corroded 7XXX aluminum alloy were investigated by means of fatigue life experiments of pre-corroded 7XXX aluminum alloys （ Kt = 1 and Kt = 3 ） in laboratory air environment and saline environment. The results showed that saline environment significantly reduces fatigue property of pre-corroded 7XXX aluminum alloy. Laboratory air environment enlarges the dispersivity of fatigue life which becomes larger with the lower stress level. Fatigue life （ gt = 1 ） is little reduced at a high stress level in saline environment and is 22.71% of that in air environment. However, it is significantly deduced at a low stress level in saline environment and is 2.22% of that in air environment |
| ISSN: | 1005-5053 |
| DOI: | 10.3969/j.issn.1005-5053.2012.3.013 |