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Microstructure and wear resistance of zirconium manufactured by laser directed energy deposition.

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Title: Microstructure and wear resistance of zirconium manufactured by laser directed energy deposition.
Authors: Hu, Chaodan1 (AUTHOR), Chai, Linjiang1 (AUTHOR) chailinjiang@cqut.edu.cn, Wang, Zhichen1 (AUTHOR), Yang, Tao1 (AUTHOR), Tang, Yi1 (AUTHOR), Wang, Zhongwei1 (AUTHOR), Gong, Weijia2 (AUTHOR), Murty, Korukonda L.3 (AUTHOR)
Source: International Journal of Refractory Metals & Hard Materials. Aug2025, Vol. 130, pN.PAG-N.PAG. 1p.
Subjects: Wear resistance, Mechanical wear, Grain refinement, Zirconium, Grain size
Abstract: In this study, a zirconium sheet was fabricated utilizing laser directed energy deposition (L-DED) technique along with its microstructure, hardness, and wear resistance to be compared with a conventionally rolled and annealed (RA) zirconium sheet. The RA specimen exhibits equiaxed grains with uniform size and a bimodal basal texture, along with a few dispersed ZrFe 2 particles. In contrast, the L-DED specimen is featured by parallel or interlaced laths (with dense entangled dislocations) and many Zr 3 Fe precipitates along the lath boundaries, exhibiting a nearly random texture. Tests reveal that the L-DED specimen shows nearly two times hardness and a ∼ 30 % reduced wear rate compared to the RA specimen. Such improvement can be jointly attributed to the enhanced second-phase, dislocation and grain refinement hardening/strengthening. This study verifies the feasibility of producing high performance zirconium materials through L-DED, which could provide some definite insight into further application of additive manufacturing to zirconium production. • Zirconium sheet was fabricated by L-DED and compared with conventionally processed sheet. • L-DED specimen is featured by lath structures with many Zr 3 Fe precipitates along lath boundaries. • L-DED specimen shows nearly doubled hardness and ∼ 30 % reduced wear rate compared to RA specimen. • Such improvement is attributed to enhanced second-phase, dislocation and grain refinement hardening. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:In this study, a zirconium sheet was fabricated utilizing laser directed energy deposition (L-DED) technique along with its microstructure, hardness, and wear resistance to be compared with a conventionally rolled and annealed (RA) zirconium sheet. The RA specimen exhibits equiaxed grains with uniform size and a bimodal basal texture, along with a few dispersed ZrFe 2 particles. In contrast, the L-DED specimen is featured by parallel or interlaced laths (with dense entangled dislocations) and many Zr 3 Fe precipitates along the lath boundaries, exhibiting a nearly random texture. Tests reveal that the L-DED specimen shows nearly two times hardness and a ∼ 30 % reduced wear rate compared to the RA specimen. Such improvement can be jointly attributed to the enhanced second-phase, dislocation and grain refinement hardening/strengthening. This study verifies the feasibility of producing high performance zirconium materials through L-DED, which could provide some definite insight into further application of additive manufacturing to zirconium production. • Zirconium sheet was fabricated by L-DED and compared with conventionally processed sheet. • L-DED specimen is featured by lath structures with many Zr 3 Fe precipitates along lath boundaries. • L-DED specimen shows nearly doubled hardness and ∼ 30 % reduced wear rate compared to RA specimen. • Such improvement is attributed to enhanced second-phase, dislocation and grain refinement hardening. [ABSTRACT FROM AUTHOR]
ISSN:02634368
DOI:10.1016/j.ijrmhm.2025.107168