Dec 01, 2020 · Optimized 316L steel samples were manufactured using laser powder bed fusion and tested in high cycle fatigue at R=0.1. They showed microstructural crack initiation and outstanding fatigue properties.
Effect of residual stress on fatigue strength of 316L Feb 09, 2021 · 316L stainless steel fatigue samples produced by laser powder bed fusion (L-PBF) process were stress relieved at 900 °C for 2 h to understand the effect of residual stress on fatigue strength. Two groups of fatigue samples were produced:polished and machined and polished. Polished samples were built to final fatigue sample geometry and then polished to avoid surface
304, 316, 321 and 347 stainless steel. Room temperature fatigue strength is approximately 22 kg/mm2 or 31.2 ksi. There is some reduction in the fatigue strength at higher temperatures. The general thumb rule is that the fatigue strength is 0.4-0.5 times the ultimate strength of the material
Enhancement of Fatigue Strength of 316L Austenitic Since fatigue strength strongly depends on surface properties, surface roughness and hardness tests were conducted as well. Results revealed a considerable enhancement in fatigue strength for all cases and a good reduction in surface roughness (34-74) %, but a slight increase in hardness (6.5-10) %. Keywords:Fatigue Strength, Stainless Steel
Fatigue Behavior of Additive Manufactured 316L Stainless For a 316L stainless steel produced through SLM, horizontally built specimens exhibit the highest fatigue resistance followed by vertically built ones, while diagonally built specimens possess the
Apr 05, 2019 · For nuclear structures made of 316 L stainless steel, welding is widely used to join different pipes, pipe-valves, or pipe-tank together. Hence, it is very important to investigate the VHCF behaviors of 316 L weldments, which would provide reference for revising the operation regulations and performance evaluation of nuclear in-core components
Influence of processing parameters on mechanical and Apr 13, 2020 · This study indicates that high-cycle fatigue life of SLM 316 L is generally inferior to wrought 316 L, with as-built samples exhibiting lower fatigue limits. This was explained by surface roughness acting as crack initiation sites. Porosity was also found to be a very significant factor in fatigue life of SLM 316 L.
What is going on with fatigue of additively manufactured asbuilt and postprocessed additively manufactured superalloy 718, stainless steel (316L and 174PH), and Ti6Al4 V is compared with their wrought coun-terparts. Further, different approaches used for assessment of the fatigue behaviour are presented. KEYWORDS
The fatigue behaviour of additively manufactured (AM) 316L stainless steel is investigated with the main emphasis on internal porosity and surface rough-ness. A transition between two cases of failure are found:failure from defects in the surface region and failure from the internal defects. At low applied load