典型阳极氧化工艺对2A12-T4铝合金疲劳寿命的影响  

Influence of Typical Anodizing Process on Fatigue Life of 2A12-T4 Aluminum Alloy

作　　者：宋雨键 秦海勤 张德跃 吉鹏程 刘坤 秦敏 SONG Yujian;QIN Haiqin;ZHANG Deyao;JI Pengcheng;LIU Kun;QIN Min(Qingdao Campus of Naval Aviation University,Shandong Qingdao 266041,China;Unit 95939,People's Liberation Army,Hebei Cangzhou 061037,China)

机构地区：[1]海军航空大学青岛校区,山东青岛266041 [2]中国人民解放军95939部队,河北沧州061037

出　　处：《装备环境工程》2025年第3期26-32,共7页Equipment Environmental Engineering

基　　金：山东省自然科学基金(ZR2021QE193)。

摘　　要：目的研究4种典型阳极氧化工艺对2A12-T4铝合金疲劳寿命的影响。方法分别采用硫酸阳极氧化、硬质阳极氧化、硫酸-硼酸阳极氧化和微弧氧化等4种典型阳极氧化工艺对2A12-T4铝合金试件进行表面处理,并开展150、200MPa等2种最大应力下的疲劳试验,对未经表面阳极化处理和不同阳极化处理试验件的疲劳寿命进行统计分析,研究典型阳极氧化工艺对2A12-T4铝合金疲劳寿命的影响。结果普通试件和4种阳极氧化试件疲劳寿命均服从对数正态分布。4种阳极氧化工艺均对2A12-T4铝合金试件的疲劳寿命产生不利影响,即分散系数变大,安全寿命减小。同时发现,应力水平增大时,同一阳极氧化工艺处理试件的分散系数也会变大,安全寿命相应减小。结论经4种阳极氧化工艺处理后,2A12-T4铝合金的疲劳寿命仍服从对数正态分布,但除最大应力为150MPa下的硫酸-硼酸阳极氧化试件的疲劳寿命增加0.4%外,其他试件的疲劳寿命均出现下降,且下降幅度与分散系数均和应力水平成正相关。The work aims to study the effects of four typical anodizing processes on the fatigue life of 2A12-T4 aluminum alloy.The surface of 2A12-T4 aluminum alloy specimens was treated with four typical anodizing processes:sulfuric acid anodizing,hard anodizing,sulfuric-boric acid anodizing,and microarc oxidation.Fatigue tests were conducted at two maximum stress levels of 150 MPa and 200 MPa.The fatigue life of anodized specimens and ordinary specimens was statistically analyzed to investigate the effects of typical anodizing processes on the fatigue life of 2A12-T4 aluminum alloy.The result showed that the fatigue life of both ordinary and anodized specimens followed a lognormal distribution.All four anodizing processes had an adverse effect on the fatigue life of 2A12-T4 aluminum alloy specimens,resulting in an increased dispersion coefficient and a reduced safe life.It was also found that the dispersion coefficient of specimens treated with the same anodizing process increased,and the safe life correspondingly decreased,with the increase of stress level.In conclusion,the fatigue life of 2A12-T4 aluminum alloy treated with the four anodizing processes still follows a lognormal distribution.However,except for a 0.4%increase in fatigue life for sulfuric-boric acid anodized specimens under a maximum stress of 150 MPa,the fatigue life of other specimens decreased.There is a positive correlation between the decreasing amplitude and the dispersion coefficient.

关 键 词：2A12-T4铝合金 阳极氧化 疲劳试验 表面处理 疲劳寿命 分散系数 

分 类 号：V252.2[一般工业技术—材料科学与工程]