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PUBLICATIONS

Surface globularization generated by standard PBF-EB Ti-6Al-4V processing achieves an improvement in fatigue performance

Published

Author(s)

Nicholas Derimow, Keenan Hanson, Newell Moser, Orion Kafka, Jake Benzing, Nik Hrabe

Abstract

Standard electron beam powder-bed fusion Ti-6Al-4V powder recovery and hot-isostatic pressing has been found to result in a surface layer microstructure change to globular α/β. Thickness control of this surface layer up to 15 μm was demonstrated by varying powder recovery blasting working distance and duration. This surface globular layer was found to improve high-cycle rotating bending fatigue strength at 10 M cycles by 60 MPa for specimens with smooth surfaces. The same trend was not observed for specimens with as-built surface roughness because globularization did not occur at dominant fatigue crack initiation sites; the roots of deep surface crevices.
Citation
International Journal of Fatigue
Pub Type
Journals

Download Paper

https://doi.org/10.1016/j.ijfatigue.2022.106810
Local Download
Metals, Materials, Manufacturing and Additive manufacturing

Citation

Derimow, N. , Hanson, K. , Moser, N. , Kafka, O. , Benzing, J. and Hrabe, N. (2022), Surface globularization generated by standard PBF-EB Ti-6Al-4V processing achieves an improvement in fatigue performance, International Journal of Fatigue, [online], https://doi.org/10.1016/j.ijfatigue.2022.106810, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933589 (Accessed April 26, 2024)

Created February 26, 2022, Updated November 29, 2022