| Title |
Wear Properties of High Temperature Al Alloys |
| Authors |
이현규(H . K . Lee); 진철(C . Jin); 조경목(K . M . Cho); 박익민(I . M . Park) |
| Abstract |
Wear behavior of high temperature Al alloys (FVS0812 and ASCM16-5Fe) under dry condition has been investigated with variations of applied load and sliding speed at ambient (R.T) and elevated temperature (150℃). Wear rate was measured and worn surfaces and wear debris were observed to characterize the wear properties and the wear mechanism of these Al alloys. Results showed that higher wear resistance of the high temperature Al alloys comparing a conventionally cast ACBA Al alloy under the applied load, sliding speed and temperature conditions of the present study. Transitional sliding speed has been observed up to which wear rate decreased and after which increased as sliding speed increased. At R.T. wear mechanism changed from mechanical abrasive to plastic deformation controlled wear with appearance of the transition sliding speed. Wear rates of high temperature Al alloys at 150℃ were lower than those at R.T., especially at the lower sliding speed range due to oxidation layer formed at 150℃ on worn surfaces preventing the wearing of Al alloys. |