April 23-26, 2018 | Fort Worth Convention Center | Fort Worth, TX | Exhibits April 24-26

Effect of Compositional Variations in MetcoAdd HX-A Powder on Crack Susceptibility, Microstructure, and Mechanical Properties

Material Properties I, II, III

Expert May 10, 2017 11:45 am - 12:10 pm

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Kumar Kandasamy PhD, Additive Manufacturing R&D Manager, Oerlikon
Shawn Kelly PhD, Head, AMCC, Oerlikon

Hastelloy X is a nickel based solution strengthened superalloy known for oxidation resistance and high temperature strength. At certain regions within the wrought or cast Hastelloy-X alloy composition space, the alloy exhibits microcracking when processed using laser powder bed fusion processes. In this presentation, amounts of minor alloying elements within the standard chemistry, part geometry, and process parameters were shown to have an influence on the crack susceptibility of L-PBF processed Hastelloy-X. The powder chemistry was shown to have the strongest influence on crack susceptibility. Analysis of the microstructure from material with and without microcracking will be presented. Results of hot-isostatic pressure heat treatment will be presented to demonstrate the ability to heal microcracks when using crack-susceptible alloy/process/geometry combinations.

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Kumar Kandasamy PhD

Additive Manufacturing R&D Manager

Dr. Kumar Kandasamy is a metallurgist and a welding engineer, who currently p

Shawn Kelly PhD

Head, AMCC

Dr. Shawn Kelly has been involved in the research and development of metal additive manufacturing sin