Dry Sliding Tribological Studies on Zinc-Aluminium Alloys with varying Aluminium Contents using Pin-on-Disc Tribometer

摘要

Zn-based alloys with different Al-content was prepared using Conventional melting and casting approach. Rockwell and Vickers’s hardness tests were performed in which hardness increased with increase in Al-content. SEM-EDS analysis of ZA8.19 alloys showed coarse η-Zn rich dendrite and α+η eutectoid colonies, ZA10.5 revealed finer η-Zn rich dendrites but more α+η eutectoid than ZA8.19 while ZA19.43 revealed α-Al rich dendrites surrounded by α+η eutectoid. Pin-on-Disc Tribometer at a speed of 0.5 m/s and 2 m/s was used to test sliding distance over a load range of 10 N and 70 N upto trial distance of 1000 m and observed that steady-state wear was reached before 1000 m of sliding in all three cases and thus was fixed for all tests. Load test was conducted over wide range of 10 N, 30 N, 50 N, and 70 N with 0.5 m/s as sliding speed and found that as Al-content increased in Zinc alloys, the weight loss increased with the increase in load with some exceptional cases. In sliding speed test, conducted over a range of 0.5 m/s, 1 m/s, 1.5 m/s and 2 m/s with load 70 N, results showed that as the Al-content increased, the weight loss decreased with increase in sliding speed with exceptional case. Overall, ZA19.43 was found to be the most wear resistant material among the three.