In-situ strengthening of a high strength low alloy steel during Wire and Arc Additive Manufacturing (WAAM)

By T. A. Rodrigues, V. Duarte, D. Tomás, J. Avila, J. Escobar, E. Rossinyol, N. Schell, Telmo G. Santos, J. P. Oliveira. Additive Manufacturing, 2020

154 citations recorded by the source corpus.

Abstract In this work, SiC particles were added to the molten pool during WAAM of a high strength low alloy steel. The introduction of these high melting point particles promoted grain refinement, and the precipitation of Fe3C due to SiC dissociation. The microstructural evolution was studied by optical and electron microscopy techniques and high energy synchrotron X-ray diffraction. Additionally, mechanical testing and hardness profiles were obtained for the SiC-containing and SiC-free parts. An improvement in the mechanical strength of the SiC-added WAAM parts was observed, which was attributed to the refined grain structure and finely dispersed Fe3C.

Subfields: Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/29d3cfdac2e4269ec77604c93becaf75c0384767

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Citations in the corpus

• Wire and arc additive manufacturing: Opportunities and challenges to control the quality and accuracy of manufactured parts (2021, background): “One of the effects of long periods of high temperatures in WAAM of low alloy steel is, for example, grain growth, which reduces hardness [18].”
• The Current State of Research of Wire Arc Additive Manufacturing (WAAM): A Review (2021, background): “There are multiple wire processes and modified wires [60,295] as well as the addition of powders [268,370] or the modification of filler by surface coatings [182,371–374], and furthermore, in situ alloying can be used to generate functionally graded structures.”