Improving fatigue performance of additively manufactured Ti-6Al-4V using sulfur-based self-terminating etching processes
Abstract
The adoption of Additively Manufactured (AM) Ti-6Al-4V (Ti64) is continually increasing in the industry due to its benefits over the conventional manufacturing techniques. However, AM Ti64 parts are prone to poor surface finish, which significantly affects their fatigue performance. Therefore, AM Ti64 parts need post-processing to enhance surface finish and fatigue performance. Prior work with a sulfur-based self-terminating etching process for AM Ti64 demonstrated support removal and surface roughness reduction. To further this work, this manuscript details the impact of this sulfur-based post-processing technique on the mechanical properties and the fatigue life of AM Ti64 by characterizing the surface roughness, microstructural evolution, and fracture surfaces. Finally, this post-processing technique decreased the surface roughness parameter - Sv by 55 % from 84 ± 11 µm to 38 ± 19 µm and increased the average fatigue life by 340 % from about 7000 cycles to 30,000 cycles.
- Authors:
-
- Colorado School of Mines, Golden, CO (United States)
- Publication Date:
- Research Org.:
- Kansas City Nuclear Security Campus (KCNSC), Kansas City, MO (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
- OSTI Identifier:
- 1907381
- Alternate Identifier(s):
- OSTI ID: 1902164
- Report Number(s):
- NSC-614-4632
Journal ID: ISSN 2214-8604
- Grant/Contract Number:
- EE0008166; NA0002839; 1944516
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Additive Manufacturing
- Additional Journal Information:
- Journal Volume: 61; Journal ID: ISSN 2214-8604
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; additive manufacturing; post-processing; Ti-6Al-4V; surface roughness; fatigue
Citation Formats
Raikar, Subbarao, DiGregorio, Steven, Agnani, Milan, Hommer, Garrison M., and Hildreth, Owen J. Improving fatigue performance of additively manufactured Ti-6Al-4V using sulfur-based self-terminating etching processes. United States: N. p., 2022.
Web. doi:10.1016/j.addma.2022.103331.
Raikar, Subbarao, DiGregorio, Steven, Agnani, Milan, Hommer, Garrison M., & Hildreth, Owen J. Improving fatigue performance of additively manufactured Ti-6Al-4V using sulfur-based self-terminating etching processes. United States. https://doi.org/10.1016/j.addma.2022.103331
Raikar, Subbarao, DiGregorio, Steven, Agnani, Milan, Hommer, Garrison M., and Hildreth, Owen J. Thu .
"Improving fatigue performance of additively manufactured Ti-6Al-4V using sulfur-based self-terminating etching processes". United States. https://doi.org/10.1016/j.addma.2022.103331. https://www.osti.gov/servlets/purl/1907381.
@article{osti_1907381,
title = {Improving fatigue performance of additively manufactured Ti-6Al-4V using sulfur-based self-terminating etching processes},
author = {Raikar, Subbarao and DiGregorio, Steven and Agnani, Milan and Hommer, Garrison M. and Hildreth, Owen J.},
abstractNote = {The adoption of Additively Manufactured (AM) Ti-6Al-4V (Ti64) is continually increasing in the industry due to its benefits over the conventional manufacturing techniques. However, AM Ti64 parts are prone to poor surface finish, which significantly affects their fatigue performance. Therefore, AM Ti64 parts need post-processing to enhance surface finish and fatigue performance. Prior work with a sulfur-based self-terminating etching process for AM Ti64 demonstrated support removal and surface roughness reduction. To further this work, this manuscript details the impact of this sulfur-based post-processing technique on the mechanical properties and the fatigue life of AM Ti64 by characterizing the surface roughness, microstructural evolution, and fracture surfaces. Finally, this post-processing technique decreased the surface roughness parameter - Sv by 55 % from 84 ± 11 µm to 38 ± 19 µm and increased the average fatigue life by 340 % from about 7000 cycles to 30,000 cycles.},
doi = {10.1016/j.addma.2022.103331},
journal = {Additive Manufacturing},
number = ,
volume = 61,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2022},
month = {Thu Dec 01 00:00:00 EST 2022}
}
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