Microstructure and mechanical properties of wire arc additively manufactured Hastelloy C276 alloy

Zhijun Qiu; Bintao Wu; Hanliang Zhu; Zhiyang Wang; Alan Hellier; Yan Ma; Huijun Li; Ondrej Muransky; David Wexler

Materials & Design (Oct 2020)

Microstructure and mechanical properties of wire arc additively manufactured Hastelloy C276 alloy

Zhijun Qiu,
Bintao Wu,
Hanliang Zhu,
Zhiyang Wang,
Alan Hellier,
Yan Ma,
Huijun Li,
Ondrej Muransky,
David Wexler

Affiliations

Zhijun Qiu: School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
Bintao Wu: School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia; Key Laboratory of Ningxia for Photovoltaic Material, Ningxia University, Yinchuan Ningxia 750021, China; Corresponding author.
Hanliang Zhu: Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, Sydney, NSW 2232, Australia
Zhiyang Wang: Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, Sydney, NSW 2232, Australia
Alan Hellier: School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
Yan Ma: School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
Huijun Li: School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
Ondrej Muransky: Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, Sydney, NSW 2232, Australia; School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
David Wexler: School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia

Journal volume & issue: Vol. 195
p. 109007

Abstract

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In this study, a Hastelloy C276 thin-wall structure was fabricated by wire arc additive manufacturing (WAAM). The microstructure and mechanical properties of the as-deposited structure were evaluated in detail using specimens extracted from different orientations and locations along the deposition direction. The results show that the primary dendrite arm spacing, dislocation density, and second-phase precipitates change along the deposition direction of the material, and they are responsible for the occurrence of anisotropy and heterogeneity in the observed mechanical properties. However, the well-distributed hardness values generated in the as-deposited sample are considered to be due to the uniform directional dendrites. This study enables a better understanding of the WAAM processing-microstructure-properties relationship for the nickel-based alloy, providing useful information for process optimization and improvement in the resultant mechanical properties.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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