Synergistic precipitation reactions in a novel high-temperature Ti-alloy

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Synergistic precipitation reactions in a novel high-temperature Ti-alloy. / Farabi, Ehsan; He, Xinyi; Obersteiner, David et al.
In: Scripta materialia, Vol. 259.2025, No. 1 April, 116543, 09.01.2025.

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Farabi E, He X, Obersteiner D, Musi M, Neves J, Klein T et al. Synergistic precipitation reactions in a novel high-temperature Ti-alloy. Scripta materialia. 2025 Jan 9;259.2025(1 April):116543. doi: 10.1016/j.scriptamat.2025.116543

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Farabi, Ehsan ; He, Xinyi ; Obersteiner, David et al. / Synergistic precipitation reactions in a novel high-temperature Ti-alloy. In: Scripta materialia. 2025 ; Vol. 259.2025, No. 1 April.

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@article{ee400c39b1e640f291709d8dccd2435e,
title = "Synergistic precipitation reactions in a novel high-temperature Ti-alloy",
abstract = "There is a pressing need for the development of new Ti-alloys tailored to wire-based directed energy deposition (waDED), to enable the wider uptake of this additive manufacturing process by the aerospace and energy industries. Here we present a novel high-temperature Ti-alloy for waDED. Our alloy design aims to exploit phase transformations and precipitation to achieve fine and homogeneous microstructures during processing and to provide improved high-temperature mechanical properties. Our new alloy design features combined additions of Si, Cu, Nb, and Y. We study its microstructural evolution during a simulated waDED solidification route and after various heat-treatments replicating the waDED thermal history in a deposited layer. Our alloy shows significant potential for the formation of fine and equiaxed β grains during waDED. Atom probe and transmission electron microscopy reveal the formation of nm-sized Ti2Cu, (Ti, Zr)6Si3 and sandwich-like Y-Cu dispersoids that are known to improve high-temperature properties in Ti-alloys.",
author = "Ehsan Farabi and Xinyi He and David Obersteiner and Michael Musi and Jos{\'e} Neves and Thomas Klein and Sophie Primig",
year = "2025",
month = jan,
day = "9",
doi = "10.1016/j.scriptamat.2025.116543",
language = "English",
volume = "259.2025",
journal = "Scripta materialia",
issn = "1359-6462",
publisher = "Elsevier",
number = "1 April",

}

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TY - JOUR

T1 - Synergistic precipitation reactions in a novel high-temperature Ti-alloy

AU - Farabi, Ehsan

AU - He, Xinyi

AU - Obersteiner, David

AU - Musi, Michael

AU - Neves, José

AU - Klein, Thomas

AU - Primig, Sophie

PY - 2025/1/9

Y1 - 2025/1/9

N2 - There is a pressing need for the development of new Ti-alloys tailored to wire-based directed energy deposition (waDED), to enable the wider uptake of this additive manufacturing process by the aerospace and energy industries. Here we present a novel high-temperature Ti-alloy for waDED. Our alloy design aims to exploit phase transformations and precipitation to achieve fine and homogeneous microstructures during processing and to provide improved high-temperature mechanical properties. Our new alloy design features combined additions of Si, Cu, Nb, and Y. We study its microstructural evolution during a simulated waDED solidification route and after various heat-treatments replicating the waDED thermal history in a deposited layer. Our alloy shows significant potential for the formation of fine and equiaxed β grains during waDED. Atom probe and transmission electron microscopy reveal the formation of nm-sized Ti2Cu, (Ti, Zr)6Si3 and sandwich-like Y-Cu dispersoids that are known to improve high-temperature properties in Ti-alloys.

AB - There is a pressing need for the development of new Ti-alloys tailored to wire-based directed energy deposition (waDED), to enable the wider uptake of this additive manufacturing process by the aerospace and energy industries. Here we present a novel high-temperature Ti-alloy for waDED. Our alloy design aims to exploit phase transformations and precipitation to achieve fine and homogeneous microstructures during processing and to provide improved high-temperature mechanical properties. Our new alloy design features combined additions of Si, Cu, Nb, and Y. We study its microstructural evolution during a simulated waDED solidification route and after various heat-treatments replicating the waDED thermal history in a deposited layer. Our alloy shows significant potential for the formation of fine and equiaxed β grains during waDED. Atom probe and transmission electron microscopy reveal the formation of nm-sized Ti2Cu, (Ti, Zr)6Si3 and sandwich-like Y-Cu dispersoids that are known to improve high-temperature properties in Ti-alloys.

U2 - 10.1016/j.scriptamat.2025.116543

DO - 10.1016/j.scriptamat.2025.116543

M3 - Article

VL - 259.2025

JO - Scripta materialia

JF - Scripta materialia

SN - 1359-6462

IS - 1 April

M1 - 116543

ER -