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Impact of grain orientation and phase on Volta potential differences in an additively manufactured titanium alloy

This work introduces a method for co-localized multi-modal imaging of sub-μm features in an additively manufactured (AM) titanium alloy. Ti-6Al-4V parts manufactured by electron beam melting powder bed fusion were subjected to hot isostatic pressing to seal internal porosity and machined to remove c...

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Autores principales: Benzing, Jake T., Maryon, Olivia O., Hrabe, Nik, Davis, Paul H., Hurley, Michael F., DelRio, Frank W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8272250/
https://www.ncbi.nlm.nih.gov/pubmed/34249471
http://dx.doi.org/10.1063/5.0038114
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author Benzing, Jake T.
Maryon, Olivia O.
Hrabe, Nik
Davis, Paul H.
Hurley, Michael F.
DelRio, Frank W.
author_facet Benzing, Jake T.
Maryon, Olivia O.
Hrabe, Nik
Davis, Paul H.
Hurley, Michael F.
DelRio, Frank W.
author_sort Benzing, Jake T.
collection PubMed
description This work introduces a method for co-localized multi-modal imaging of sub-μm features in an additively manufactured (AM) titanium alloy. Ti-6Al-4V parts manufactured by electron beam melting powder bed fusion were subjected to hot isostatic pressing to seal internal porosity and machined to remove contour–hatch interfaces. Electron microscopy and atomic force microscopy-based techniques (electron backscatter diffraction and scanning Kelvin probe force microscopy) were used to measure and categorize the effects of crystallographic texture, misorientation, and phase content on the relative differences in the Volta potential of α-Ti and β-Ti phases. Given the tunability of additive manufacturing processes, recommendations for texture and phase control are discussed. In particular, our findings indicate that the potential for micro-galvanic corrosion initiation can be regulated in AM Ti-6Al-4V parts by minimizing both the total area of {111} prior-β grains and the number of contact points between {111} β grains and α laths that originate from {001} prior-β grains.
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spelling pubmed-82722502021-07-10 Impact of grain orientation and phase on Volta potential differences in an additively manufactured titanium alloy Benzing, Jake T. Maryon, Olivia O. Hrabe, Nik Davis, Paul H. Hurley, Michael F. DelRio, Frank W. AIP Adv Article This work introduces a method for co-localized multi-modal imaging of sub-μm features in an additively manufactured (AM) titanium alloy. Ti-6Al-4V parts manufactured by electron beam melting powder bed fusion were subjected to hot isostatic pressing to seal internal porosity and machined to remove contour–hatch interfaces. Electron microscopy and atomic force microscopy-based techniques (electron backscatter diffraction and scanning Kelvin probe force microscopy) were used to measure and categorize the effects of crystallographic texture, misorientation, and phase content on the relative differences in the Volta potential of α-Ti and β-Ti phases. Given the tunability of additive manufacturing processes, recommendations for texture and phase control are discussed. In particular, our findings indicate that the potential for micro-galvanic corrosion initiation can be regulated in AM Ti-6Al-4V parts by minimizing both the total area of {111} prior-β grains and the number of contact points between {111} β grains and α laths that originate from {001} prior-β grains. 2021 /pmc/articles/PMC8272250/ /pubmed/34249471 http://dx.doi.org/10.1063/5.0038114 Text en https://creativecommons.org/licenses/by/4.0/All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle Article
Benzing, Jake T.
Maryon, Olivia O.
Hrabe, Nik
Davis, Paul H.
Hurley, Michael F.
DelRio, Frank W.
Impact of grain orientation and phase on Volta potential differences in an additively manufactured titanium alloy
title Impact of grain orientation and phase on Volta potential differences in an additively manufactured titanium alloy
title_full Impact of grain orientation and phase on Volta potential differences in an additively manufactured titanium alloy
title_fullStr Impact of grain orientation and phase on Volta potential differences in an additively manufactured titanium alloy
title_full_unstemmed Impact of grain orientation and phase on Volta potential differences in an additively manufactured titanium alloy
title_short Impact of grain orientation and phase on Volta potential differences in an additively manufactured titanium alloy
title_sort impact of grain orientation and phase on volta potential differences in an additively manufactured titanium alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8272250/
https://www.ncbi.nlm.nih.gov/pubmed/34249471
http://dx.doi.org/10.1063/5.0038114
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