High Wear-Resistant Aluminum Matrix Composite Layer Fabricated by MIG Welding with Lateral B4C Powder Injection
Abstract
In this work, a low-cost technique combining MIG welding and lateral powder injection was developed to fabricate B4C particles-reinforced aluminum matrix composite (AMC) layer on a T6 heat-treated 7075 aluminum alloy (AA7075-T6) substrate. The AMC layer was 6-7 mm thick and well bonded to the substrate. The B4C particles were dispersed throughout the AMC layer with an average content of approximately 7 vol.%. No significant reaction products existed either at the particle–matrix interface or in the Al-matrix. In pin-on-disk dry sliding wear tests against Al2O3 grinding wheels, the AMC layer exhibited excellent wear resistance with volume wear rate approximately 1/10-3/10 that of the quenched AISI 1045 steel and only approximately 2-7% that of the AA7075-T6 alloy under the same wear conditions. A small addition of ceramic particles can greatly improve wear resistance, suggesting that this technique has good prospects for a wide variety of applications.
- Publication:
-
Journal of Materials Engineering and Performance
- Pub Date:
- November 2018
- DOI:
- 10.1007/s11665-018-3672-4
- Bibcode:
- 2018JMEP...27.5700S
- Keywords:
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- aluminum matrix composite;
- B<SUB>4</SUB>C particle;
- MIG;
- powder injection;
- surface;
- wear