Effects of heat energy on morphology and properties of selective inhibition sintered high density polyethylene

Abstract

This study provides an account of comprehensive experimentation and mechanical characterisation of high density polyethylene (HDPE) parts that are fabricated through an additive manufacturing process called selective inhibition sintering (SIS). Tensile and flexural test specimens are fabricated through selectively fusing the HDPE powder particles with a controlled heating environment. Morphological studies are performed to examine the coalescence of HDPE particles through sintering. Results indicate that, heat energy up to a threshold level of 28.48 J/mm 2 results in superior fusion of the HDPE particles, and further increase causes degradation of the structure. Surface roughness, tensile and flexural properties of SIS parts are compared with those of injection moulded parts for assessing their suitability to engineering applications.