Controlling the Microstructure of Hastelloy-X Components Manufactured by Selective Laser Melting

By Dacian Tomus, T. Jarvis, Xinhua Wu, J. Mei, P. Rometsch, E. Herny, Jean-François Rideau, S. Vaillant. 2013

138 citations recorded by the source corpus.

Abstract Selective Laser Melting (SLM) is steadily gaining acceptance across the manufacturing industry. Techniques for manufacturing components with complex geometries layer by layer have proven to be very effective in accelerating product development and hence reducing time to market. To build components by SLM from a nickel based super-alloy requires an understanding of process parameters and how they influence the microstructure, the degree of porosity and the properties. In this work, it was found that the as-fabricated density of parts manufactured from Hastelloy-X by SLM could be increased from 77 to 99% by decreasing the laser scan speed, and that the degree of cracking can be reduced by decreasing the amount of minor alloying additions such as Mn and Si.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/294ef8943a1ae7ab10e62fdfafd25a0c74e235ac

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Citations in the corpus

Effect of temperature on the microstructure and tensile properties of micro-crack free hastelloy X produced by selective laser melting (2020, background): “Several works have reported on the influence of trace elements such as Si, Mn and C on the cracking susceptibility of the material when processed by SLM [17,19,20].”
Reduction of micro-cracking in nickel superalloys processed by Selective Laser Melting: A fundamental alloy design approach (2015, background): “Of particular interest is that Si, one of the minor elements highlighted by Tomus [1], does not show any sign of concentration at the crack edge, nor do any of the primary matrix elements (Ni, Cr and Fe) deplete.”
Laser powder bed fusion of Hastelloy X: Effects of hot isostatic pressing and the hot cracking mechanism (2018, background): “Recent studies have focussed on microcrack minimisation and the hot cracking mechanism in the LPBF of Hastelloy X [12,13].”