High Wear-Resistant Aluminum Matrix Composite Layer Fabricated by MIG Welding with Lateral B4C Powder Injection
- Resource Type
- Original Paper
- Authors
- Sun, Jianxin; Shen, Ping; Zeng, Daxin
- Source
- Journal of Materials Engineering and Performance. 27(11):5700-5708
- Subject
- aluminum matrix composite
B4C particle
MIG
powder injection
surface
wear
- Language
- English
- ISSN
- 1059-9495
1544-1024
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.