Effect of microstructural features on the failure behavior of hybrid laser welded AA7020
文献类型：期刊论文
| 作者 | Fu, YN; Hu, YN ; Wu, SC; Song, Z; Yuan, QX; Zhang, LL; Yuan QX(袁清习)
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| 刊名 | FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
 |
| 出版日期 | 2018 |
| 卷号 | 41期号:9页码:2010-2023 |
| 关键词 | fatigue crack initiation and growth gas porosity high-speed railway vehicle laser-MIG hybrid welding synchrotron radiation X-ray microtomography |
| ISSN号 | 8756-758X |
| DOI | 10.1111/ffe.12838 |
| 文献子类 | Article |
| 英文摘要 | Detailed investigations of microstructural feature, mechanical property, fatigue strength, and damage mechanism were conducted on hybrid laser welded 7020-T651 aluminum alloys used into high-speed railway vehicles. The results show that the hybrid laser welding process can induce significant changes of microstructures and alloying elements, together with numerous gas pores. Such local modifications degrade the fatigue performance. The tensile strength of welded joints was approximately 74% with respect to the base metal, thus satisfying the design standard. The fatigue property was determined in the low and high cycle regimes. It was found that the fatigue strength of welded joints was fairly inferior to that of the base metal, but far higher than the IIW recommended value. Furthermore, welding defects were well believed to contribute to the shorter fatigue life. The small fatigue crack growth presented highly discontinuous and inhomogeneous due to microstructure and porosity. By contrast, the crack stable growth stage was less sensitive to microstructural features of hybrid welded joints. |
| 电子版国际标准刊号 | 1460-2695 |
| WOS关键词 | X-RAY MICROTOMOGRAPHY ; ALUMINUM-ALLOY ; MECHANICAL-PROPERTIES ; FATIGUE PROPERTIES ; AL-ALLOY ; STRENGTH ; POROSITY ; CRACKING ; JOINTS ; FRACTURE |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000440650800012 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286184]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Fu, YN,Hu, YN,Wu, SC,et al. Effect of microstructural features on the failure behavior of hybrid laser welded AA7020[J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,2018,41(9):2010-2023. |
| APA | Fu, YN.,Hu, YN.,Wu, SC.,Song, Z.,Yuan, QX.,...&袁清习.(2018).Effect of microstructural features on the failure behavior of hybrid laser welded AA7020.FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,41(9),2010-2023. |
| MLA | Fu, YN,et al."Effect of microstructural features on the failure behavior of hybrid laser welded AA7020".FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES 41.9(2018):2010-2023. |
入库方式： OAI收割
来源：高能物理研究所
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