Effect of Heat Treatment on the Structure, Phase Composition and Impact Toughness of Inconel 718 Alloy Under Additive Manufacturing
Phase composition of the laser additively manufactured Inconel 718 alloy was investigated. The main strengthening phase of heat-treated materials conditions is gamma’ phase. δ phase deposited near Laves phase particles. Charpy impact tests show increasing of toughness in 1.5 times with the changing of building direction from parallel to transverse in as-deposited and heat-treated materials conditions. Crack propagation in the as-deposited samples is accompanied by the destruction of particles of the Laves phase and bypass them in the heat-treated material.
Tags: additive manufacturing heat-resistance ni-base alloys heat treatment impact toughness phase composition аддитивные технологии жаропрочные никелевые сплавы термическая обработка ударная вязкость фазовый состав
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