Assessment of Structure and Properties Homogeneity after Repairing of a Nickel-Based Superalloy Product by the Electron Beam Additive Technology

高温合金 材料科学 同质性(统计学) 阴极射线 热的 再分配(选举) 冶金 复合材料 微观结构 电子 热力学 计算机科学 物理 机器学习 法学 政治 量子力学 政治学
作者
D. A. Gurianov,S. V. Fortuna,S. Y. Nikonov,Tatiana Kalashnikova,Andrey Chumaevskii,V. R. Utyaganova,Evgeny Kolubaev,Valery E. Rubtsov
出处
期刊:Crystals [Multidisciplinary Digital Publishing Institute]
卷期号:12 (10): 1400-1400 被引量:1
标识
DOI:10.3390/cryst12101400
摘要

Repairing damaged products made of nickel-based superalloys is an urgent task because replacing them with new products is a costly and time-consuming process. The present work considers the method of electron-beam additive manufacturing as an approach to the repair process. First of all, the initial product was produced by layer-by-layer deposition. Hereon, a part of the surface was removed, and then several more layers were deposited. Thus, three areas were considered in the work: initial, transitional, and repaired areas. Each of the formed regions was defect-free. It was found that the transition region was difficult to identify since it did not differ in structural-phase composition from the initial and repaired regions. It is shown that the complex thermal history consisting of periodic thermal exposure and repeated melting of the newly crystallized layers does not lead to the formation of defects and undesirable phases. Moreover, in all three regions, there is a redistribution of the chemical element content of the γ′ and γ phases towards an increase in the mismatch of their lattice parameters. The mechanical properties of the transition and repaired regions are not significantly different from the initial area.
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