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11/24/2025 | Press release | Distributed by Public on 11/25/2025 03:02

Site-specific texture and its influence on mechanical behavior in direct energy deposited Ti-6Al-4V walls

Published
November 24, 2025

Author(s)

Rajib Halder, Arjun Mahato, Souvik Sahoo, Jake Benzing, Shibayan Roy, Anthony Rollett

Abstract

The laser hot wire direct energy deposited (LHW-DED) Ti-6Al-4V wall structures suffer from variable cooling rates along the build direction due to heat buildup. These variations in thermal history affect the microstructure, texture, and texture-mediated mechanical response within the wall structures. In the present work, site-specific texture in single and multi-walls and its concomitant effect on the localized mechanical properties are investigated via large-scale EBSD characterization and a polycrystal plasticity model based on the viscoplastic self-consistent (VPSC) framework. The effect of secondary process parameters viz. interlayer delay and scan strategy, on the texture evolution was also examined. The results revealed that the transformed α and (prior) β texture intensities simultaneously increases with increasing wall height. The reconstructed parent β grains depicts a strong cube texture while two α fibers, namely ⟨0112⟩α and ⟨1120⟩α aligned parallel to the build direction in both single- and multi-wall samples. The VPSC simulations suggested that the tensile properties and anisotropic mechanical behavior are closely related to the site-specific texture in the walls.
Citation
Materials Science and Engineering A
Pub Type
Journals

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Keywords

Ti-6Al-4V (Ti64), Laser Hot Wire Directed Energy Deposition (LHW-DED), Wall Structure, Site-specific Texture, Mechanical Properties
Process improvement, Metals, Materials characterization and Additive manufacturing

Citation

Halder, R. , Mahato, A. , Sahoo, S. , Benzing, J. , Roy, S. and Rollett, A. (2025), Site-specific texture and its influence on mechanical behavior in direct energy deposited Ti-6Al-4V walls, Materials Science and Engineering A, [online], https://doi.org/10.1016/j.msea.2025.149476, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=960130 (Accessed November 25, 2025)

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NIST - National Institute of Standards and Technology published this content on November 24, 2025, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on November 25, 2025 at 09:02 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]