U.S. Department of Energy Office of Scientific and Technical Information
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
Journal Article·· International Journal of Fatigue
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.
Pegues, J. W., et al. "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." International Journal of Fatigue, vol. 132, Nov. 2019. 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., & Phan, N. (2019). 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. International Journal of Fatigue, 132. https://doi.org/10.1016/j.ijfatigue.2019.105358
Pegues, J. W., Shao, S., Shamsaei, N., et al., "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," International Journal of Fatigue 132 (2019), https://doi.org/10.1016/j.ijfatigue.2019.105358
@article{osti_1658677,
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.},
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},
annote = {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},
url = {https://www.osti.gov/biblio/1658677},
journal = {International Journal of Fatigue},
issn = {ISSN 0142-1123},
volume = {132},
place = {United States},
publisher = {Elsevier},
year = {2019},
month = {11}}
Louisiana State Univ., Baton Rouge, LA (United States)
Sponsoring Organization:
National Science
Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019378
OSTI ID:
1658677
Alternate ID(s):
OSTI ID: 1867807 OSTI ID: 1776375
Journal Information:
International Journal of Fatigue, Journal Name: International Journal of Fatigue Vol. 132; ISSN 0142-1123