The achievable mechanical properties of SLM produced Maraging Steel 300 components
- 18 April 2016
- journal article
- Published by Emerald in Rapid Prototyping Journal
- Vol. 22 (3), 487-494
- https://doi.org/10.1108/rpj-08-2014-0096
Abstract
Purpose Selective laser melting (SLM) is a process that produces near net shape parts from metallic powders. A concern with SLM-produced metals is the achievable materials performance with respect to mechanical properties. Particularly, three important aspects strongly affect the mechanical properties of the material: internal stresses resulting from steep temperature gradients and high cooling rates, the resulting microstructure and the occurrence of pores and flaws. Design/methodology/approach This paper presents SLM-produced maraging steel 300 (18Ni-300), an iron-nickel steel alloy often used in applications where high fracture toughness and strength are required. The steel’s achievable tensile, crack growth and hardness properties and the manner in which these compare to the wrought counterpart are reported. In addition, this paper investigates the porosity distribution and achievable density, residual stress levels and post-processing procedures using heat-treatments. Findings It is found that tensile properties, hardness and microstructure compare well to its wrought counterpart. Fatigue growth rates are also comparable, though they are influenced by residual stresses and microstructure. Originality/value The investigation into the mechanical performance addresses two issues: the achievable mechanical properties and the understanding of the link between the manufacturing process and the achievable material performance.Keywords
This publication has 18 references indexed in Scilit:
- RESIDUAL STRESS MEASUREMENTS AND STRUCTURAL INTEGRITY IMPLICATIONS FOR SELECTIVE LASER MELTED TI-6AL-4VSouth African Journal of Industrial Engineering, 2012
- On the mechanical behaviour of titanium alloy TiAl6V4 manufactured by selective laser melting: Fatigue resistance and crack growth performanceInternational Journal of Fatigue, 2012
- Additive manufactured AlSi10Mg samples using Selective Laser Melting (SLM): Microstructure, high cycle fatigue, and fracture behaviorMaterials & Design (1980-2015), 2012
- In situ characterization of the deformation and failure behavior of non-stochastic porous structures processed by selective laser meltingMaterials Science and Engineering: A, 2011
- Additive manufacturing of Ti–6Al–4V components by shaped metal deposition: Microstructure and mechanical propertiesMaterials & Design (1980-2015), 2010
- Shaped metal deposition of a nickel alloy for aero engine applicationsJournal of the American Academy of Dermatology, 2007
- Binding mechanisms in selective laser sintering and selective laser meltingRapid Prototyping Journal, 2005
- Lasers and materials in selective laser sinteringAssembly Automation, 2003
- The manufacturing of hard tools from metallic powders by selective laser meltingJournal of the American Academy of Dermatology, 2001
- Fatigue crack propagation in martensitic and austenitic steelsMetallurgical Transactions, 1973