Modares Mechanical Engineering

Modares Mechanical Engineering

Evaluating Effect of Laser Energy Density on Relative Density, Defects, And Hardness of Selective Laser Melted Hastelloy X Ni-Based Superalloy

Document Type : Original Research

Abstract
Nowadays, one of the most important problems in industry is the production of industrial parts from superalloys and metals with high hardness using traditional and modern machining methods, due to the waste of raw materials, wear of machining tools, and the inability to produce complex geometries. Selective Laser Melting is one of the sub-branch of additive manufacturing technology that provides the fabrication of complex geometries from widely-used metallic materials due to the layer-by-layer production of parts. Hastelloy X superalloy is among the important superalloys in the aerospace industry and gas turbines. This research aims to fabricate Hastelloy X parts by selective laser melting with minimal defects and high relative density. For this purpose, three samples were printed in the range of volumetric energy density of laser from 50 to 90 J/mm3. The structure and porosity of different specimens were evaluated by image analysis method. It was found that the sample fabricated with the volumetric energy density of 90 J/mm3 has the least defects, the highest hardness, and a relative density above 99 percent.
Keywords
Supperalloy
Additive Manufacturing
Selective Laser Melting
Hastelloy X

Subjects

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Modares Mechanical Engineering
Volume 22, Issue 10
October 2022
Pages 247-252