Akademik Veri Yönetim Sistemi
Journal of Manufacturing Technology Research, cilt.10, sa.1-2, ss.60-79, 2018 (Scopus)
Selective Heat Sintering (SHS) process aims to produce near net shape components through sintering of specific region of powder particles. Evaluation of mechanical strength characteristics of SHS parts are of major importance to produce functional parts for diverse applications. The present study focuses on investigation of tensile and flexural strengths of SHS of high density polyethylene (HDPE) specimens through varying SHS process variables. SHS system is custom built and experiments are conducted based on four factors three level box-behnken design. The interaction among SHS process variables for examining the mechanical strengths using response surface analysis is performed. Optimal SHS process variables are obtained using non-dominated sorting genetic algorithm (NSGA-II) technique. The tensile and flexural specimens are fabricated in the developed SHS system and their strength characteristics are determined through experiments. Morphological examinations are conducted using scanning electron microscope (SEM) where in pull outs, voids and pores are observed in the fractured surfaces. Sensitivity analysis is performed to examine the mechanical strength with reference to various SHS process variables. These analyses provided an insight for the fabrication of near net shape components with sufficient mechanical strengths.