Compression behavior of diamond cellular structure made of Inconel 718

Abstract

The article aims to investigate compression behaviour of Diamond cellular structure at different cross-head speeds. The samples were made of Inconel 718 alloy by DMLS (Direct Metal Laser Sintering) technology and heat treated according to AMS 5664 procedure. The compression tests were performed according to ASTM E9 international standard at ambient temperature employing a servohydraulic testing machine Instron 8802 with a maximum capacity of 250 kN at three different cross-head speeds v = 1; 10 and 100 mm/min. The results showed that testing speed does not affect significantly the maximum force results, and that the Diamond structure of 20 % volume fraction exceeded the upper load limit of the testing machine, i.e. 250 kN, for all three testing speeds.