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

Download Paper

https://doi.org/10.1016/j.msea.2025.149476

Local Download

Keywords

Ti-6Al-4V (Ti64), Laser Hot Wire Directed Energy Deposition (LHW-DED), Wall Structure, Site-specific Texture, Mechanical Properties

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)