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阳极氧化处理对2014-T6铝合金弯曲疲劳性能的影响 被引量:2

EFFECT OF ANODIZING TREATMENT ON BENDING FATIGUE PROPERTIES OF2014-T6 ALUMINIUM ALLOY
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摘要 对2014-T6铝合金疲劳试样的缺口部位进行了阳极氧化处理,表面氧化层厚度分别为5,10和20μm.通过旋转弯曲疲劳试验机对阳极氧化处理前后的疲劳试样进行了疲劳实验.分析了阳极氧化处理对该铝合金材料弯曲疲劳性能的影响,并讨论了该材料的弯曲疲劳性能随着表面氧化层厚度增加的变化趋势.结果表明,在中低应力下,阳极氧化处理降低该铝合金材料的弯曲疲劳寿命;随着氧化层厚度增加,疲劳裂纹起始位置从氧化层表面转移到铝合金基体表面,材料的弯曲疲劳寿命降低,但厚度增加到一定程度,材料S-N曲线的倾斜部分随着氧化层厚度的继续增加基本保持不变. Anodizing treatment was performed on the notched portion of fatigue specimens of the 2014-T6 aluminium alloy. The thicknesses of the oxide layer induced by the treatment were 5, 10 and 20 μm, respectively. Fatigue tests were carried out on the specimens with and without anodizing treatment using a rotating bending fatigue machine. According to experimental results, the effect of anodizing treatment on the bending fatigue properties of the aluminium alloy was analyzed. In addition, the dependence of the bending fatigue properties of the material upon the thickness of the oxide layer was discussed. The results indicate that the anodizing treatment decreases the bending fatigue life of the aluminium alloy under low and medium stress. With increasing thickness of the oxide layer, the crack initiation site transfers from the oxide layer surface to the substrate surface and the bending fatigue life of the alloy decreases; however, when the oxide layer thickness increases to a certain extent, the S-N curve above the fatigue limit of the alloy does not change even if the thickness continues to increase.
作者 张艳斌 张立民 张继旺 曾京 ZHANG Yanbin, ZHANG Limin, ZHANG Jiwang, ZENG Jing (State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031)
出处 《金属学报》 SCIE EI CAS CSCD 北大核心 2014年第6期715-721,共7页 Acta Metallurgica Sinica
基金 国家自然科学基金资助项目51305363
关键词 铝合金 阳极氧化处理 氧化层厚度 疲劳性能 疲劳极限 aluminium alloy anodizing treatment thickness of the oxide layer fatigue property fatigue limit
作者简介 张艳斌,男,1983年生,博士 Correspondent: ZHANG Limin, professor, Tel: (028)87600868, E-mail: zhang-lm01@163. com
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