Abstract
The effect of shot penning on wear rate of natural materials was investigated experimentally. Egg shell - polyester was used in this experiment using (30% and 55%) weight fraction. The samples were affected on shot penning for two different times (2 min and 6 min) with variation of solidification times (six, four and two days). The wear rate and mechanical properties of natural composite samples (with and without shot penning) were found. The hardness tester for natural composite samples was done. The resultant shows that, the increasing weight fraction causes increasing of solidification of natural composite materials. The egg shell-polyester (55%) weight fraction samples have mechanical properties and reduction wear rate better than egg shell – polyester (30%) weight fraction samples. The increasing time of shot penning causes reduction in wear rate. The egg shell (55%) weight fraction natural composite material has good resistance to wear rate under shot penning. The suitable shot peening time for fiber egg shell natural composite materials is equal or less than 6 min.
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