Goss texture intensity effect on fatigue crack propagation resistance in an Al-Cu-Mg alloy

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[1] [1,2,Wu, Wenting
[2] 1,2,Liu, Zhiyi
[3] 1,2,Hu, Yangcheng
[4] 1,2,3,Li, Fudong
[5] 1,2,Bai, Song
[6] 1,2,Xia, Peng
[7] 1,2,Wang, An
[8] 1,2,Ye, Chengwu
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Liu, Zhiyi (liuzhiyi@mail.csu.edu.cn) | 1600年 / Elsevier Ltd卷 / 730期
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摘要：
Goss texture intensity effect on fatigue crack propagation (FCP) resistance in an Al-Cu-Mg alloy sheet is investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron back scattering diffraction (EBSD). Results show that sheet with high intensity Goss texture presents a lower FCP rate than relatively low intensity Goss-texture one. Greater crack deflections in the high intensity Goss texture sheet are observed during FCP, resulting in a rougher fracture surface and a greater roughness induced crack closure (RICC) effect, comparing to the low intensity Goss texture sheet. A modified crystallographic model is developed to calculate the twist angle and tilt angle between neighboring grains. Therefore, fatigue crack deflection occurred during FCP could be analyzed and understood. © 2017
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