Investigation on the Effect of Grit size on Two Body Abrasive Wear Behavior of Polyamide66/Polypropylene (PA66/PP) blends

Publication date: 2018 Source:Materials Today: Proceedings, Volume 5, Issue 1, Part 3 Author(s): B.V. Lingesh, B.N. Ravikumar, B.M. Rudresh The effect of grit size on two body abrasive wear behaviour of Polyamide66 and Polypropylene (PA66/PP) blends of 95/5, 90/10, 85/15, 80/20, 75/25 and 70/30 wt.% are investigated as per ASTM G99 by using pin on disc machine. The test were conducted for a load of 10N at a velocity of 1 m/s using abrasive SiC paper (180, 320 and 600 grit) in multi pass condition. The results revealed that the wear volume and specific wear rate are the function of abrading distance, grit size and composite blend. For a load of 10N and 180 grit with 5wt.% of PP, there was an increase in the wear volume of 86.6% against 300% increase in abrading distance. For 30wt.% PP in blend results in 18.12 mm3 of wear volume for minimum distance and 38.5 mm3 for maximum distance which is 112% increase for the same tested condition. More volume of material loss is due to the coarse grain size of 180 grit SiC paper. In addition, inclusions of PP into the blend results in poor wear resistance. But the average wear resistance was obtained for 80/20 wt.% PA66/PP blend. The wear volume loss occurred up to 25 wt.% of PP in the blend. Further increase of PP in blend decreased the wear volume loss. Similar observations were made for 320 and 600 grit size also. The experimental response of the study follows linear trend for all the grits. Micro cutting, deep abrasion and micro ...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research