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

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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.

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Acknowledgments

The study is partially supported by the NSF (CMMI-1404926). The authors would like to acknowledge Felipe Barbosa, Christa Torrence, and Dr. Nancy Ruzycki of the University of Florida for their sample preparation and microscopy assistance.

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Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida, 32611, USA

    Brian Davis & Yong Huang

  2. Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, Missouri, 65409, USA

    Frank Liou

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  1. Brian Davis
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  2. Frank Liou
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  3. Yong Huang
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Correspondence to Yong Huang.

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Davis, B., Liou, F. & Huang, Y. Study of grain size variation and saw-tooth spacing during machining of additively manufactured titanium alloy. MRS Communications 5, 341–346 (2015). https://doi.org/10.1557/mrc.2015.35

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  • DOI: https://doi.org/10.1557/mrc.2015.35

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