NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
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.
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 October 21, 2025)