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Study of grain size variation and saw-tooth spacing during machining of additively manufactured titanium alloy

Published online by Cambridge University Press:  02 June 2015

Brian Davis ,
Frank Liou  and
Yong Huang
Brian Davis
Affiliation:
Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, USA
Frank Liou
Affiliation:
Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, USA
Yong Huang*
Affiliation:
Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, USA
*
Address all correspondence to Yong Huang at[email protected]
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Abstract

Additive manufacturing, also known as three-dimensional printing, has provided a promising solution to produce near-net shape components directly from metallic powder. However, their surface roughness still prevents them from immediate use; finish machining is usually required. This study has investigated the grain size variation and saw-tooth/shear-band spacing during the machining of titanium alloy (Ti–6Al–4V) printed using direct metal deposition. Grain refinement was observed within both the printed and substrate regions, and their grain structures retained the basket-weave Widmanstätten and bimodal structures, respectively. The saw-tooth spacing decreased as the build height increased.

Type
Research Letters
Information
MRS Communications , Volume 5 , Issue 2 , June 2015 , pp. 341 - 346
Copyright
Copyright © Materials Research Society 2015 

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