Year: 2026
Type: article
Abstract: The aim of this study was to develop low-melting-point brazing filler metals for marine aluminum alloy AA5083. Six Zn–Al–Cualloys with varying aluminum contents were designed and systematically investigated. Among the examined alloys, Zn-4Al-3Cu exhibited the lowest liquidus temperature of 397.5 °C, whereas Zn–14Al–3Cushowed a higher liquidus temperature of 435.5 °C. The Zn–14Al–3Cualloy demonstrated the smallest equilibrium contact angle and the longest flow distance at a joint gap of 0.8 mm. Calculations based on contact angle and surface tension data indicated that this alloy also possessed the highest capillary pressure. When the aluminum content was below 6 wt%, the microstructure consisted of η (Zn) dendrites and eutectic structures composed of layered η (Zn) and fine interlamellar eutectoid phases of η (Zn) and α (Al). With increasing aluminum content above 6 wt%, the microstructure evolved into dendritic eutectoid η + α structures together with lamellar eutectic phases. At the filler/base interface, zinc infiltration along the grain boundaries of the aluminum base metal was observed. The Zn–14Al–3Cualloy contained the fine eutectoid η + α structures, as well as the ε (CuZn 4 ) intermetallic compounds which contributed to strengthening of the filler alloy. Consequently, Zn–14Al–3Cuexhibited the highest shear strength and average hardness among the investigated fillers.
Source: Journal of Materials Science
Institution: National Chung Hsing University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,590
Awards: Study on the Relationship among Structure, Viscosity and Foaming Characteristics of Cao-Sio2-Al2o3-Mgo-Feo Melts, Study on the Influence of High Proportion Recycled Alumina Addition on the Properties of High Alumina Castables and Formula Optimization, Development of Low-Carbon Ironmaking and Steelmaking Technologies( I )
OpenAlex ID: W7165014425