Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 293, Issue 1-2, Pages 1-6Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0921-5093(00)01249-1
Keywords
SiCp/Al MMCs; laser beam welding; in-situ weld-alloying; aluminum carbide; titanium carbide; titanium silicide
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In this paper, 'in-situ' weld-alloying/laser beam welding with titanium as alloying element is utilized to join SiCp/6061Al MMC in order to prevent the formation of the needle-like harmful Al4C3 phases in the weld. Microstructure of the weld is characterized as functions of alloying content and processing parameters. Results show that the needle-like harmful aluminum carbides are completely eliminated. A central fusion weld joint reinforced by TiC, Ti5Si3 and Al3Ti is produced by 'in-situ' weld-alloying/laser beam welding of SiCp/6061Al MMC, while some large pores are formed in the partly melted zone. (C) 2000 Elsevier Science S.A. All rights reserved.
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