Purpose

The purpose of this paper is to determine the corrosion fatigue behavior and mechanism of 6005A aluminum alloy and welded joint.

Design/methodology/approach

Electron back-scattered diffraction (EBSD) were adopted to characterize the microstructure of 6005A aluminum alloy and welded joint. Through potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and corrosion fatigue experiments, the corrosion fatigue behavior and mechanism of 6005A aluminum alloy base metal and welded joint were studied.

Findings

The results show that the corrosion fatigue crack initiation of 6005A aluminum alloy base metal and welded joint is mainly caused by the preferential anodic dissolution and hydrogen concentration in the areas with inclusions and welding defects.

Originality/value

The research is an originality study on the corrosion fatigue behavior and mechanism of 6005A aluminum alloy and welded joint.

中文翻译：

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6005A铝合金与焊接接头腐蚀疲劳行为及机理研究

目的

本文旨在确定6005A铝合金与焊接接头的腐蚀疲劳行为及机理。

设计/方法/方法

采用电子背散射衍射（EBSD）对6005A铝合金和焊接接头的微观结构进行表征。通过动电位极化、电化学阻抗谱（EIS）和腐蚀疲劳实验，研究了6005A铝合金母材和焊接接头的腐蚀疲劳行为和机理。

发现

结果表明，6005A铝合金母材和焊接接头的腐蚀疲劳裂纹萌生主要是由于夹杂物和焊接缺陷区域的优先阳极溶解和氢浓度增加所致。

原创性/价值

该研究是对6005A铝合金与焊接接头腐蚀疲劳行为及机理的独创性研究。