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

被引：43
|
作者：
Wu, Wenting [1 ,2 ,3 ]
Liu, Zhiyi [1 ,2 ,3 ]
Hu, Yangcheng [1 ,2 ,3 ]
Li, Fudong [1 ,2 ,3 ,4 ]
Bai, Song [1 ,2 ,3 ]
Xia, Peng [1 ,2 ,3 ]
Wang, An [1 ,2 ,3 ]
Ye, Chengwu [1 ,2 ,3 ]
机构：
[1] Cent S Univ, Sci & Technol High Strength Struct Mat Lab, Changsha 410083, Hunan, Peoples R China
[2] Cent S Univ, Key Lab Nonferrous Met Mat Sci & Engn, Minist Educ, Changsha 410083, Hunan, Peoples R China
[3] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[4] FAW Volkswagen Automobile Co, Foshan Branch, Foshan 528000, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 730卷
关键词：
Fatigue crack propagation; Goss texture; Crystallographic model; Al-Cu-Mg alloy thick sheet; 2XXX ALUMINUM-ALLOYS; FRACTURE-BEHAVIOR; CRYSTALLOGRAPHIC MECHANISM; NANOSTRUCTURED MATERIALS; PLASTIC-DEFORMATION; GRAIN-BOUNDARIES; STAGE-II; GROWTH; NUCLEATION; INITIATION;
D O I：
10.1016/j.jallcom.2017.09.320
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
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. (C) 2017 Published by Elsevier B.V.
引用
收藏
页码：318 / 326
页数：9
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