Analysis of test results under static load conditions of 316L steel

Metal powder 3D printing technology is gaining popularity due to the possibility of producing structural elements complex geometry, which production with methods used so far difficult or impossible obtain. An example a material in parts by additive method 316L steel, bone support screws, surgical tools and needles, other industries for exhaust manifolds, furnaces heat exchangers. The study investigated mechanical properties, hardness microstructure steel produced selective laser melting process (SLM). Based on tests, following properties were obtained: Su = 566.7MPa, S p0.2 484MPa, E 113820MPa, A 79.5%, Z 72.3%. test results show significant increase as tensile approaches sample fracture. structure grip part characterized formation visible semi-elliptical zones alloy, pools crystallized grains cell-column oriented direction thermal gradient. This type characteristic which, after solidification, cooling takes place at high speed.