Abstract
The analysis of foreign publications in terms of effect assessing of the recycled powder material reusing frequency and the construction platform loading density on the impurities level, technological characteristics of recycled powder in the process of selective laser melting (SLM) and synthesized materials mechanical properties is performed. The results of mechanical tests set: short-term tensile and long-term strength, low-cycle fatigue of synthesized samples of VZh159 nickel-based superalloy with comparison of the structure studies results by TEM and X-ray energy dispersion microanalysys methods are analyzed for reasonable choice of the assessing criterion for the material structure degradation in the SLM process with increase in the construction platform loading density and the recycled powders involvement. It is shown that the most effective structure degradation assessing criterion for the SLM nickel-based superalloy material is short-term tensile strength tests at the maximum operating temperature.
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