Microstructure and mechanical property evolutions of bulk core-shell structured Ti-N alloys during annealing

Zhang, Y.S.; Zhang, W.; Wang, X.; Lu, Jiping; Zhao, Yaohua

doi:10.1016/j.jallcom.2017.03.254

Cited by 9 publications

(2 citation statements)

References 21 publications

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“…However, their fracture to elongation is only 3.6%, which is far lower than the required ductility of engineering structural parts (generally above 8%) [6]. Previously, we developed a novel core-shell structured TiMCs with both high compression strength and large strain (~ 10%) [7][8][9], but with very a low tensile elongation (~ 1%) during the tensile deformation, which also limits the application in engineering practice.…”

Section: Introductionmentioning

confidence: 99%

Synergetic enhancement of strength and ductility for titanium-based composites reinforced with nickel metallized multi-walled carbon nanotubes

Dong

Zhang

et al. 2021

Carbon

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Section: Introductionmentioning

confidence: 99%

Synergetic enhancement of strength and ductility for titanium-based composites reinforced with nickel metallized multi-walled carbon nanotubes

Dong

Zhang

et al. 2021

Carbon

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“…The alloy exhibits a significant enhancement in mechanical properties and a markedly reduced coarsening rate in comparison with binary or ternary Fe−Cu alloys. Zhang et al 21 designed a core−shell structure comprising a Ti core and a shell layer of Ti−Ni solid solution phase in a titanium matrix. The findings demonstrated that the core−shell-structured titanium alloys exhibited a higher yield strength of approximately 1000 MPa and excellent fracture plasticity of 26%.…”

Section: Introductionmentioning

confidence: 99%

Multicomponent Alloy of FeCoNiVTiAl with a Dual Core–Shell Structure and Cactus-Like Morphology for Aerospace Applications

Liu,

Chen

et al. 2024

ACS Appl. Nano Mater.

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A dual core−shell structure with cactus-like morphology in a FeCoNiVTiAl multiprincipal element alloy was synthesized for the first time through a reasonable composition design, which is used as a candidate for aerospace applications. The morphology evolution of this core−shell structure and its response to mechanical properties with the Ti/Al ratio were characterized and discussed. The results demonstrated that the core− shell is characterized by a dual-core structure, comprising a Co, Ti-rich nucleus, a core with particle morphology enriched in Co, Fe, and Ti elements located in the center of the nucleus, and a shell with cactus-like morphology enriched in Fe and Co elements. The formation of the cactus-like core−shell structure in the FeCoNiTiAlV alloy is contingent upon the Ti/Al ratio exceeding 8:4. This process is divided into three distinct stages: (1) nonequilibrium crystallization and elements segregation; (2) component subcooling and the formation of the shell; (3) Fe segregation and precipitation with particles in the core. This study offers insight into the heterogeneous structure of multiprincipal element alloys and presents a promising strategy for their design with high properties.

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Recent Advances in the Design and Fabrication of Strong and Ductile (Tensile) Titanium Metal Matrix Composites

et al. 2019

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Titanium metal matrix composites (TiMMCs) offer much improved strength, elastic modulus, and wear resistance at both room and elevated temperatures but often at the expense of tensile ductility, which excludes them from most key engineering applications. Recent advances show that this long-standing strength-ductility dilemma can be controlled to a large extent by adopting novel design concepts based on powder metallurgy (PM). These include: 1) reinforcing the Ti matrix with a three-dimensional (3D) network-like architecture of TiB whiskers or nanowires; 2) the use of nanostructured carbon precursors (nanotubes, fibers, and graphene) to enable in situ formation of TiC reinforcements; and 3) the exploitation of "ductility-detrimental" interstitial elements (O, N, H) for strengthening. On a laboratory scale, the fabricated TiMMCs all exhibit an excellent combination of tensile strength and elongation, comparable to, or even better than, solution-treated and aged (STA) wrought Ti-6Al-4V. The mechanisms behind these novel developments are analyzed. New insights into the design and fabrication of stronger and more ductile (tensile) TiMMCs are offered.

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Microstructure and mechanical property evolutions of bulk core-shell structured Ti-N alloys during annealing

Cited by 9 publications

References 21 publications

Synergetic enhancement of strength and ductility for titanium-based composites reinforced with nickel metallized multi-walled carbon nanotubes

Synergetic enhancement of strength and ductility for titanium-based composites reinforced with nickel metallized multi-walled carbon nanotubes

Multicomponent Alloy of FeCoNiVTiAl with a Dual Core–Shell Structure and Cactus-Like Morphology for Aerospace Applications

Recent Advances in the Design and Fabrication of Strong and Ductile (Tensile) Titanium Metal Matrix Composites

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