Study of brazeability of aluminum matrix composites
- Univ. Complutense de Madrid (Spain). Dept. de Ciencia de los Materiales e Ingenieria Metalurgica
The brazeability of several aluminum matrix composites has been evaluated in the present paper. Tested materials were two different 6061 aluminum alloys, reinforced with 10 and 20% alumina particles, respectively, and a 7005 aluminum alloy containing 10% alumina also in the form of discrete particles. A drop formation test was selected to evaluate the brazeability of the studied composites, using a commercial filler metal (BAlSi4) generally used for brazing of aluminum alloys. Wettability of molten braze on the metal matrix composites (MMCs) was determined by measurement of the solidified contact angle i n sessile drop tests and determination of the spread area. The wettability and spreading increase with the brazing temperature in the studied range (550--625 C, 1,022--1,157 F), and decrease when the reinforcement proportion is increased. Both properties are also influenced by the type of the composite aluminum matrix being enhanced in the Al-Zn-Mg reinforced alloy. This study was completed with the microstructural characterization of the drop test specimens and of real brazed joints made on T-shaped specimens.
- Sponsoring Organization:
- Comision Interministerial de Ciencia y Tecnologia (Spain)
- OSTI ID:
- 471152
- Journal Information:
- Welding Journal, Journal Name: Welding Journal Journal Issue: 2 Vol. 76; ISSN 0043-2296; ISSN WEJUA3
- Country of Publication:
- United States
- Language:
- English
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