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Tensile Properties of Built and Rebuilt/Repaired Specimens of 316L Stainless Steel Using Directed Energy Deposition
Journal of Materials Engineering and Performance ( IF 2.3 ) Pub Date : 2020-09-09 , DOI: 10.1007/s11665-020-05087-z
Louis Simoneau , Alexandre Bois-Brochu , Carl Blais

One of the most exciting possibilities brought forward by some additive manufacturing (AM) processes is their ability to deposit materials on existing parts. Mainly achievable with directed energy deposition systems, it is thus possible to repair worn or broken components. Two applications were studied in this research: (1) complete construction and (2) repair of tensile specimens made of 316L-Si stainless steel. The latter series was produced by adding material on existing half specimens made of wrought 316L stainless steel. All specimens were built along the Z-axis. Tensile specimens machined from wrought were also tested for comparison purposes. Three conditions were tested for each series of AM specimens: as-built, stress relieved and HIPed. The results show that yield strength, ultimate tensile strength (UTS) and elongation are higher than the typical tensile properties reported for annealed 316L. Repairs show excellent bond resistance with the wrought material and good mechanical properties with a mean UTS of 647 MPa in the as-built condition.



中文翻译:

定向能量沉积法对316L不锈钢的已建和改建/修复试样的拉伸性能

一些增材制造(AM)工艺带来的最令人兴奋的可能性之一是它们能够将材料沉积在现有零件上。主要通过定向能量沉积系统可以实现,因此可以修复磨损或损坏的组件。在这项研究中研究了两种应用:(1)完整的构造和(2)修复由316L-Si不锈钢制成的拉伸试样。后一个系列是通过在现有的由316L不锈钢制成的一半试样上添加材料而制成的。所有标本均沿Z轴构建。还对通过锻造加工的拉伸试样进行了测试,以进行比较。对于每个系列的AM样品,测试了三个条件:竣工,应力消除和HIP。结果表明,屈服强度,极限抗拉强度(UTS)和伸长率高于退火316L报道的典型拉伸性能。维修表现出与锻造材料的优异抗粘结性,以及良好的机械性能,在竣工条件下的平均UTS为647 MPa。

更新日期:2020-09-10
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