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 December 13, 2024)
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Surface globularization generated by standard PBF-EB Ti-6Al-4V processing achieves an improvement in fatigue performance
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Author(s)
, Keenan Hanson, , , ,
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
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Created February 26, 2022, Updated November 29, 2022