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Investigation microstructure and fracture behavior of welded stainless steel specimens previously obtained by supersonic laser deposition
Journal of Manufacturing Processes ( IF 6.2 ) Pub Date : 2020-06-09 , DOI: 10.1016/j.jmapro.2020.05.040
A.I. Gorunov

Stainless steel 316 L specimens, previously deposited by supersonic laser deposition, were welded by laser metal deposition method (SLD_W_LMD). The issues of structure formation in deposited SLD samples with additional laser processing were considered. The microstructure and mechanical properties of the specimens, the metallurgical anisotropy between powder particles and gradient structure of SLD_W_LMD specimen was investigated. The microhardness of specimen obtained by SLD higher into 1.7 times compare SLD_W_LMD specimen. It is shown that the hardness of the SLD samples is achieved due to the partial preservation of the initial powder particles. Tensile strength SLD_W_LMD specimen higher into 1.14 times comparison to specimen obtained by SLD. The relative deformations of the specimen SLD_W_LMD are 1.5 times higher than that of the SLD samples. These results are achieved due to good metallurgical contact between powder particles, which is achieved due to laser influence.



中文翻译:

超音速激光沉积先前获得的焊接不锈钢试样的显微组织和断裂行为的研究

通过激光金属沉积方法(SLD_W_LMD)焊接以前通过超声激光沉积法沉积的316 L不锈钢试样。考虑了通过额外的激光处理在沉积的SLD样品中形成结构的问题。研究了试样的显微组织和力学性能,粉末颗粒之间的冶金各向异性以及SLD_W_LMD试样的梯度结构。通过SLD获得的试样的显微硬度比SLD_W_LMD试样高1.7倍。结果表明,由于部分保留了初始粉末颗粒,SLD样品的硬度得以实现。SLD_W_LMD试样的拉伸强度是SLD试样的1.14倍。样品SLD_W_LMD的相对变形比SLD样品高1.5倍。

更新日期:2020-06-09
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