https://scholars.lib.ntu.edu.tw/handle/123456789/598475
標題: | Effect of post-weld heat treatment on the solid-state diffusion bonding of 6061 aluminum alloy | 作者: | Chen C.-H Sun Y.-K Lai Y.-C Chang S.-Y Chuang T.-H. TUNG-HAN CHUANG |
關鍵字: | Aluminum alloy 6061;Diffusion bonding;Fractography;Post-weld heat treatment | 公開日期: | 2021 | 卷: | 11 | 期: | 20 | 來源出版物: | Applied Sciences (Switzerland) | 摘要: | The precipitation-hardenable aluminum alloy 6061 (AA 6061) is favored for aerospace components and automotive parts. However, the tenacious oxide layer on the surface greatly limits the quality and applicability of joining AA 6061. In this study, the joining method of solid-state diffusion bonding was implemented for AA 6061 plates, and the effects of post-weld heat treatment (PWHT) on the joint interface were investigated. The bonding temperatures were within the range of 500–530?C, and the time periods varied from 30 to 240 min under a static pressure of 5 MPa in a vacuum. The diffusion bonded specimens were subjected to T4-and T6-PWHT to improve the bonding quality. The interfacial microstructure of the joints was analyzed by scanning electron microscopy, and the mechanical properties were evaluated with shear tests. The experimental results showed that the shear strength of the diffusion bonded joint could reach around 71.2 MPa, which was highly dependent on bonding temperature and holding time, and T6-PWHT further enhanced it to over 100 MPa. The effects of PWHT on the diffusion bonded AA 6061 joint were investigated, and the fractography on the sheared surfaces indicated that PWHT-T6 played an important role in enhancing joint strength, which was consistent with the measured shear strength. The sequential PWHT for AA 6061 after diffusion bonding was proven to be feasible for bonding of AA 6061 parts, and the joint strength was sufficient for industrial needs. ? 2021 by the authorsLicensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117270782&doi=10.3390%2fapp11209660&partnerID=40&md5=30d71a503e98c729943f5f56e774a4d9 https://scholars.lib.ntu.edu.tw/handle/123456789/598475 |
ISSN: | 20763417 | DOI: | 10.3390/app11209660 |
顯示於: | 材料科學與工程學系 |
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