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Adiabatic shear banding behavior of additively manufactured superalloy in 625
Bhavsar, Pavan Lopez-Hawa, Homar Ananda-Kumar, Rajesh Madhavan, Viswanathan Moscoso-Kingsley, Wilfredo
Bhavsar, Pavan
Lopez-Hawa, Homar
Ananda-Kumar, Rajesh
Madhavan, Viswanathan
Moscoso-Kingsley, Wilfredo
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Bhavsar_2019.pdf
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2019
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Conference paper
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Keywords
Machining,Additive manufacturing,Superalloy,Dynamic behavior,Adiabatic shear banding
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Citation
Bhavsar, Pavan; Lopez-Hawa, Homar; Ananda-Kumar, Rajesh; Madhavan, Viswanathan; Moscoso-Kingsley, Wilfredo. 2019. Adiabatic shear banding behavior of additively manufactured superalloy in 625. Procedia Manufacturing, vol. 34:pp 722-730
Abstract
Additively manufactured nickel superalloy (IN 625) has gained popularity as an alternative to produce high value products of complex geometries for high strength applications under high temperature and corrosive environments. Many of these applications also demand the alloy to withstand high strain rate plastic deformation before the onset of catastrophic failure. The alloy's utility for high strain rate applications would be compromised if it were to fail suddenly by mechanisms such as adiabatic shear localization. This paper evaluates the shear localization behavior of an additively manufactured IN 625, and compares it to the behavior of the material of equal nominal composition, but prepared by traditional cast-wrought processing. The evaluation was made by imposing pure shear at strain rates of the order of 10,000 1/s in a simple machining configuration. It was found that the additive alloy experienced adiabatic shear banding more readily than the cast-wrought counterpart did. This finding contradicted predictions based on constitutive models developed for both alloys from split-Hopkinson compression testing, which indicated that the additive alloy strain hardened more than the cast-wrought counterpart did.
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© 2019 The Authors. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
Publisher
Elsevier
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Series
Procedia Manufacturing;v.34
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2351-9789