Effect of a Surface Element Exposure Algorithm for Selective Laser Melting on the Mechanical Properties of the Synthesized Material: I. Short- and Long-Term Strength
A. G. Evgenov, P. V. Ryzhkov, S. V. Shurtakov, R. Yu. Malinin
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引用次数: 0
Abstract
Using a VZh159 superalloy as an example, we consider the formation of the surfaces of the gage portion and the fillet transitions during the selective laser melting synthesis of profiled monolithic cylindrical and flat specimens for mechanical tests. The main defect in the near-surface layer is found to be scattered gas microporosity. After heat treatment, a fine-grained layer forms at the surface of the profiled specimens. When cylindrical synthesized specimens without additional processing of the gage portion surface are tested, their short-term strength characteristics at temperatures of 20, 800, and 1000°C are found to decrease by no more than 3, 4, and 17%, respectively, compared to polished synthesized specimens.
期刊介绍：
Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.
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