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Vol.40, No.4, 432 ~ 440, 2002
Title
Research papers / Mechanical Behaviors : Dry Sliding Wear Behavior of SiC , TiC , and B4C Reinforced 6061 Al Matrix Composites Manufactured by a Pressureless Infiltration Technique
박형철Hyoung Chul Park,강신철Shin Chul Kang,권훈Hoon Kwon,김용석Yong Suk Kim
Abstract
Dry sliding wear behavior was investigated in SiC, TiC and B_4C particle reinforced 6061 Al matrix composites that were manufactured by a pressureless infiltration technique. Pin-on-disk wear tests were performed on the composite disk specimen against a hardened AISI 52100 steel ball at various applied loads. Wear resistance of the composites was always higher than that of the monolithic alloy under all test conditions. The resistance increased with the increase of the size and volume fraction of the reinforcing particles. Subsurface deformation and delamination of the deformed (comminuted) layer was a major wear mechanism of the composites at high wear rates, while the composites displayed abrasive-wear-like behavior at low wear rates. Among the composites tested, the SiC reinforced composite showed the lowest wear resistance. Wear resistance of all the composites increased remarkably after T6 heat treatment. Variation of matrix hardness immediately below worn surfaces and the role of surface-iron-oxide layers formed during wear of the composites were also discussed.
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