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| Mechanism Study and Stress Corrosion Property of 7055 Aluminum Alloy under Constant Load Condition |
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Received:April 23, 2013
Revised:April 23, 2013
Accepted:April 26, 2013
Published Online:September 29, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.10.014 |
| KeyWord:spray forming; 7055 aluminum alloy; stress corrosion; mechanical properties |
| Author | Institution |
| xiahao |
兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室 |
| yang mingjie |
兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室 |
| xia tiandong |
兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室 |
| zhao wenjun |
兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室 |
| qiao jisen |
兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室 |
| zhanghan |
兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室 |
| duan ruifeng |
中国铝业西北铝加工分公司 |
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| Abstract: |
| The stress corrosion resistance of 7055 aluminum alloy under different constant loadings was studied by tensile test under optical and electron microscopy observation. The results show that the tensile strength presents no obvious decline while the plasticity decreases 40% during the test cycle. The closer load approaches yield strength, the severer decrease of plasticity (i.e. elongation and tensile strain) is. Pittings and intergranular voids and cracks are observed on surface layer of specimen. During the tensile test, the stress concentration in voids could become crack source, leading to deterioration of plasticity. Intergranular fracture is observed on the edge of fracture surface. |
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