Failure analysis of 7A04 aluminum alloy shell

doi:10.13251/j.issn.0254-6051.2023.04.047

Abstract

Abstract: Cracking failure occurred in 7A04 aluminum alloy shell during service. The causes of cracking were analyzed by observing the appearance of failed part and macro and micro morphologies of fracture, testing and comparing the material, microstructure, mechanical properties and surface stress of failed parts and inventory parts. The results show that the failed shell is brittle fractured along longitudinal direction of the shell, the main cause of the cracking is that the transverse mechanical properties of the shell is relatively low, and the working stress beared by the shell is large.

Key words: 7A04 aluminum alloy, shell, cracking, failure analysis

CLC Number:

U214.8⁺2

Wang Cuiying, Yang Youcai, Ke Meiwu, Chu Xiaofei, Wang Wei. Failure analysis of 7A04 aluminum alloy shell[J]. Heat Treatment of Metals, 2023, 48(4): 298-302.

References

[1]崔长齐, 杨丽红, 王秋菊, 等. 承受高冲击载荷铝合金薄壁件开裂的原因与预防[J]. 精密成形工程, 2013, 5(6): 11-14, 41.
Cui Changqi, Yang Lihong, Wang Qiuju, et al. Cause and prevention for crack of aluminum alloy thin-walled housing bearing high impact load[J]. Journal of Netshape Forming Engineering, 2013, 5(6): 11-14, 41.
[2]高新宇. 7A04T6铝合金厚壁管材环状裂纹分析与预防措施[J]. 铝加工, 2017(4): 54-58.
Gao Xinyu. Annular crack analysis and precautionary measures for 7A04T6 aluminum alloy pipe with thick wall[J]. Aluminium Fabrication, 2017(4): 54-58.
[3]于建民, 张治民, 王强. 高强铝合金轮辋失效分析[J]. 机械强度, 2018, 40(1): 55-60.
Yu Jianmin, Zhang Zhimin, Wang Qiang. Failure analysis of high strength aluminum alloy wheel[J]. Journal of Mechanical Strength, 2018, 40(1): 55-60.
[4]李贝贝, 王元清, 支新航, 等. 我国7×××系高强铝合金及其研究进展[J]. 建筑钢结构进展, 2021, 23(7): 1-10.
Li Beibei, Wang Yuanqing, Zhi Xinhang, et al. A review on the research of the 7××× series high strength aluminum alloys as structural material in China[J]. Progress in Steel Building Structures, 2021, 23(7): 1-10.
[5]丛福官, 赵刚, 田妮, 等. 7×××系超高强铝合金的强韧化研究进展及发展趋势[J]. 轻合金加工技术, 2012, 40(10): 23-33.
Cong Fuguan, Zhao Gang, Tian Ni, et al. Research progress and development trend of strengthening-toughening of ultra-high strength 7××× aluminum alloy[J]. Light Alloy Fabrication Technology, 2012, 40(10): 23-33.
[6]杨有才, 柯美武, 孙志刚. 7A04铝合金T6处理开裂失效分析[J]. 金属热处理, 2015, 40(4): 204-206.
Yang Youcai, Ke Meiwu, Sun Zhigang. Failure analysis of 7A04 aluminum alloy by T6 heat treatment[J]. Heat Treatment of Metals, 2015, 40(4): 204-206.
[7]杨勇彪, 张治民, 王强. 挤压7A04铝合金轮辋断裂失效分析[J]. 轻合金加工技术, 2013, 41(6): 58-62.
Yang Yongbiao, Zhang Zhimin, Wang Qiang. Fracture failure analysis of extruded 7A04 aluminum alloy wheel rim[J]. Light Alloy Fabrication Technology, 2013, 41(6): 58-62.
[8]丁慧麟, 金荣芳. 金属构件缺陷、失效分析与实例[M]. 北京: 化学工业出版社, 2020: 22-23.

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