Fatigue of additive manufactured Ti-6Al-4V, Part I: The effects of powder feedstock, manufacturing, and post-process conditions on the resulting microstructure and defects
Abstract
Additive manufacturing provides an appealing means to process titanium alloy parts with new levels of conformability, complexity, and weight reduction. However, due to the heating/cooling rates and heat transfer associated with directed energy source material processing, the as-built AM parts contain unique material and microstructural features. In order to confidently manufacture fatigue critical additive manufactured (AM) Ti-6Al-4V parts, a better understanding of the interrelationships between powder feedstock, AM processes, structure of the processed parts, their resulting mechanical properties, and their performance under realistic loadings is necessary. Part I of this two-part collection focuses on the powder-process-structure relationships and how powder feedstock, manufacturing, and post-processing conditions can affect the microstructure and defect features that ultimately contribute to the fatigue performance of Ti-6Al-4V parts. The material and physical phenomena inherent to the AM process of Ti-6Al-4V are discussed in detail and related to the phase composition/structure, grain morphology, surface characteristics, defect size/distribution, and post-process treatments available for AM parts. This investigation is the foundation for the structure-performance relationships that will be covered in detail in Part II.
- Authors:
-
- Auburn Univ., AL (United States)
- Univ. of Toledo, OH (United States)
- Univ. of Memphis, TN (United States)
- Cornell Univ., Ithaca, NY (United States)
- US Naval Air Systems Command (NAVAIR), Patuxent River, MD (United States)
- Publication Date:
- Research Org.:
- Louisiana State Univ., Baton Rouge, LA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR)
- OSTI Identifier:
- 1658677
- Alternate Identifier(s):
- OSTI ID: 1776375; OSTI ID: 1867807
- Grant/Contract Number:
- SC0019378; 1657195; N000141712035
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal of Fatigue
- Additional Journal Information:
- Journal Volume: 132; Journal ID: ISSN 0142-1123
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Additive manufacturing; Microstructure; Post-processing; Defects; Process parameters
Citation Formats
Pegues, J. W., Shao, S., Shamsaei, N., Sanaei, N., Fatemi, A., Warner, D. H., Li, P., and Phan, N. Fatigue of additive manufactured Ti-6Al-4V, Part I: The effects of powder feedstock, manufacturing, and post-process conditions on the resulting microstructure and defects. United States: N. p., 2019.
Web. doi:10.1016/j.ijfatigue.2019.105358.
Pegues, J. W., Shao, S., Shamsaei, N., Sanaei, N., Fatemi, A., Warner, D. H., Li, P., & Phan, N. Fatigue of additive manufactured Ti-6Al-4V, Part I: The effects of powder feedstock, manufacturing, and post-process conditions on the resulting microstructure and defects. United States. https://doi.org/10.1016/j.ijfatigue.2019.105358
Pegues, J. W., Shao, S., Shamsaei, N., Sanaei, N., Fatemi, A., Warner, D. H., Li, P., and Phan, N. Sat .
"Fatigue of additive manufactured Ti-6Al-4V, Part I: The effects of powder feedstock, manufacturing, and post-process conditions on the resulting microstructure and defects". United States. https://doi.org/10.1016/j.ijfatigue.2019.105358. https://www.osti.gov/servlets/purl/1658677.
@article{osti_1658677,
title = {Fatigue of additive manufactured Ti-6Al-4V, Part I: The effects of powder feedstock, manufacturing, and post-process conditions on the resulting microstructure and defects},
author = {Pegues, J. W. and Shao, S. and Shamsaei, N. and Sanaei, N. and Fatemi, A. and Warner, D. H. and Li, P. and Phan, N.},
abstractNote = {Additive manufacturing provides an appealing means to process titanium alloy parts with new levels of conformability, complexity, and weight reduction. However, due to the heating/cooling rates and heat transfer associated with directed energy source material processing, the as-built AM parts contain unique material and microstructural features. In order to confidently manufacture fatigue critical additive manufactured (AM) Ti-6Al-4V parts, a better understanding of the interrelationships between powder feedstock, AM processes, structure of the processed parts, their resulting mechanical properties, and their performance under realistic loadings is necessary. Part I of this two-part collection focuses on the powder-process-structure relationships and how powder feedstock, manufacturing, and post-processing conditions can affect the microstructure and defect features that ultimately contribute to the fatigue performance of Ti-6Al-4V parts. The material and physical phenomena inherent to the AM process of Ti-6Al-4V are discussed in detail and related to the phase composition/structure, grain morphology, surface characteristics, defect size/distribution, and post-process treatments available for AM parts. This investigation is the foundation for the structure-performance relationships that will be covered in detail in Part II.},
doi = {10.1016/j.ijfatigue.2019.105358},
journal = {International Journal of Fatigue},
number = ,
volume = 132,
place = {United States},
year = {Sat Nov 02 00:00:00 EDT 2019},
month = {Sat Nov 02 00:00:00 EDT 2019}
}
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Fatigue Performance of Additively Manufactured Ti-6Al-4V: Surface Condition vs. Internal Defects
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