Investigation into using resonant frequency measurements to predict the mechanical properties of Ti-6Al-4V manufactured by selective laser melting

There is a need to qualify additively manufactured parts that are used in highly regulated industries such as aerospace and nuclear power. This paper investigates the use of resonant ultrasound measurements to predict the mechanical properties of Ti-6Al-4V manufactured by selective laser melting usi...

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Bibliographic Details
Published in:Scientific reports 2019-06, Vol.9 (1), p.9278-10, Article 9278
Main Authors: Todd, Mark A., Hunt, James, Todd, Iain
Format: Article
Language:English
Subjects:
639/166/984
639/301
Humanities and Social Sciences
Mechanical properties
Melting
multidisciplinary
Nuclear energy
Rapid prototyping
Science
Science (multidisciplinary)
Ultrasound
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Summary:There is a need to qualify additively manufactured parts that are used in highly regulated industries such as aerospace and nuclear power. This paper investigates the use of resonant ultrasound measurements to predict the mechanical properties of Ti-6Al-4V manufactured by selective laser melting using a Renishaw AM 250. It is first demonstrated why R 2 should not be used to assess the predictive capability of a model, before introducing a method for calculating predicted R 2 , which is then used to assess the models. It is found that a linear model with the resonant frequency peaks as predictors cannot be used to predict elongation at failure or reduction in area. However, linear models did demonstrate better predictive capabilities for Young’s modulus, yield strength, and especially ultimate tensile strength.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-45696-w