Researching the Properties of Samples Fabricated Using Selective Laser Melting from A High-Temperature Nickel-Based Alloy

Alexey Mazalov,Vladimir Promakhov,Dmitry Platko,Nikita Schulz,Alexander Vorozhtsov,Lydia Zelenina,Dmitry Shmatov

doi:10.3390/app11041419

Abstract

A possible application of a metal powder composition made of a high-temperature nickel-based alloy with high heat strength (the material is analogous to Inconel 718) in selective laser melting (SLM, an additive manufacturing technology) was considered. Peculiarities of material formation in the course of selective laser melting of the metal have been researched, and the mechanical properties of the material were determined. The effect of the thermal treatment mode on the mechanical characteristics was investigated. It was shown that the tensile strength of samples made of a high-temperature nickel alloy when the samples have not been subjected to thermal treatment is ~950 MPa; samples subjected to thermal treatment is ~1070 MPa.

Highlights

Scientific and Educational Center “Additive technologies”, National Research Tomsk State University, Abstract: A possible application of a metal powder composition made of a high-temperature nickelbased alloy with high heat strength in selective laser melting (SLM, an additive manufacturing technology) was considered
The presented thermal treatment modes were selected based on the analysis of the literature in terms of the effect of thermal treatment on the mechanical properties of metals manufactured by Additive manufacturing (AM) [22,23,24,25,26,27,28,29]
According to [25], thermal treatment at high temperatures may lead to re-crystallization and a high percent of dual boundaries in the C263 superalloy fabricated by selective laser melting, which hinders the growth of creeping flow cracks

Summary

Introduction

Scientific and Educational Center “Additive technologies”, National Research Tomsk State University, Abstract: A possible application of a metal powder composition made of a high-temperature nickelbased alloy with high heat strength (the material is analogous to Inconel 718) in selective laser melting (SLM, an additive manufacturing technology) was considered. It was shown that the tensile strength of samples made of a hightemperature nickel alloy when the samples have not been subjected to thermal treatment is ~950 MPa; samples subjected to thermal treatment is ~1070 MPa. Researching the Properties of Keywords: additive manufacturing technologies; selective laser melting; metal powder composition; high heath strength; nickel alloy; mechanical properties; tensile strength; hardness. Selective laser melting (SLM) provides freedom for design necessary for manufacturing parts with complex geometry without using ad-hoc tools, which allows for saving time and materials. The main purpose of SLM is the fabrication of quality parts with predictable mechanical properties, such as density, Academic Editor: Alireza Kashani

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Discussion

Conclusion