期刊
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
卷 21, 期 2, 页码 114-123出版社
TAYLOR & FRANCIS LTD
DOI: 10.1179/1362171815Y.0000000072
关键词
Ultrasonic additive manufacturing; Metal matrix composites; Ultrasonic welding; Dissimilar joining; Post-treatment
资金
- Israeli Ministry of Defense
- M. Norfolk of Fabrisonic LLC
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [1238286] Funding Source: National Science Foundation
Ultrasonic additive manufacturing (UAM) is a solid state manufacturing process for joining thin metal tapes using principles of ultrasonic metal welding. The process operates at low temperatures, enabling dissimilar material welds without generating harmful intermetallic compounds. In this study, a 9 kW UAM system was used to create joints of Al 1100 and commercially pure titanium. Viable process parameters were identified through pilot weld studies via controlled variation of weld force, amplitude and weld speed. Push-pin delamination tests and shear tests were performed, comparing as-built, heat treated and spark plasma sintering treated samples. Heat treated and spark plasma sintering treated samples yielded mechanical strengths over twice that of as-built samples. Electron backscatter diffraction measurements show that deformation and grain refinement only take place in the aluminium layers. Heat treated samples exhibit a thin intermetallic layer, which is hypothesised as constraining the interface, leading to the improved strength.
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