Electron Beam Additive Manufacturing of Titanium Components: Properties and Performance

Author:

Edwards P.1,O'Conner A.2,Ramulu M.3

Affiliation:

1. Boeing Research & Technology, The Boeing Company, Seattle, WA 98124 e-mail:

2. Graduate Assistant e-mail:

3. Boeing-Pennell Professor of Engineering e-mail:  Department of Mechanical Engineering, University of Washington, Seattle, WA 98195

Abstract

This research evaluates the fatigue properties of Ti-6Al-4V specimens and components produced by Electron Beam additive manufacturing. It was found that the fatigue performance of specimens produced by additive manufacturing is significantly lower than that of wrought material due to defects such as porosity and surface roughness. However, evaluation of an actual component subjected to design fatigue loads did not result in premature failure as anticipated by specimen testing. Metallography, residual stress, static strength and elongation, fracture toughness, crack growth, and the effect of post processing operations such as machining and peening on fatigue performance were also evaluated.

Publisher

ASME International

Subject

Industrial and Manufacturing Engineering,Computer Science Applications,Mechanical Engineering,Control and Systems Engineering

Reference27 articles.

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2. Rapid Manufacturing and Rapid Tooling With Layer Manufacturing (LM) Technologies, State of the Art and Future Perspectives;CIRP Ann.,2003

3. Microstructures and Mechanical Properties of Electron Beam-Rapid Manufactured Ti-6Al-4V Biomedical Prototypes Compared to Wrought Ti-6Al-4V;Mater. Charact.,2009

4. Characterization of Titanium Aluminide Alloy Components Fabricated by Additive Manufacturing Using Electron Beam Melting;Acta Mater.,2010

5. Effects of Processing on Microstructure and Mechanical Properties of a Titanium Alloy (Ti-6Al-4V) Fabricated Using Electron Beam Melting (EBM), Part 1: Distance From Build Plate and Part Size;Mater. Sci. Eng., A,2013

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