Atomic diffusion mechanism and interface nanomechanics in the Al/Ti composite structures

Liu, Mingfu; Meng, Zijie; Zhao, Guoqun; Chen, Liang

doi:10.1016/j.compositesb.2021.109507

Cited by 29 publications

(2 citation statements)

References 68 publications

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“…During the phase transformation, the α phase and γ phase strictly follow the Blackburn orientation relationship. However, the phase transformation between the α/α 2 phase and γ phase involves elemental diffusion, which is extremely sensitive to temperature, and the element is extremely difficult to diffuse at the service temperature [ 40 , 41 , 42 ]. Therefore, in the conventional thermal exposure experiment, the α 2 phase still has a minimal range of phase transformation after thousands of hours and does not cause long-distance diffusion or evident phase transformation.…”

Section: Resultsmentioning

confidence: 99%

Microstructure Evolution of the Ti-46Al-8Nb-2.5V Alloy during Hot Compression and Subsequent Annealing at 900 °C

Cao,

Li,

et al. 2023

Materials

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TiAl alloys are high-temperature structural materials with excellent comprehensive properties, and their ideal service temperature range is about 700–950 °C. High-Nb containing the Ti-46Al-8Nb-2.5V alloy was subjected to hot compression and subsequent annealing at 900 °C. During hot compression, work-hardening and strain-softening occurred. The peak stresses during compression are positively correlated with the compressive strain rates and negatively correlated with the compression temperatures. The α2 phase exhibited a typical (0001)α2 basal plane texture after hot compression, while the β0 and γ phases did not show a typical strong texture. Subsequent annealing at 900 °C of the hot-compressed samples resulted in significant phase transformations, specifically the α2 → γ and β0 → γ phase transformations. After 30 min of annealing, the volume fraction of the α2 phase decreased from 39.0% to 4.6%. The microstructure characteristics and phase fraction after 60 min of annealing were similar to those after 30 min. According to the calculation of Miller indexes and texture evolution during annealing, the α2 → γ phase transformation did not follow the Blackburn orientation relationship. Multiple crystal-oriented α2 phases with nanoscale widths (20~100 nm) precipitate within the γ phase during the annealing process, which means the occurrence of γ → α2 phase transformation. Still, the γ → α2 phase transformation follows the Blackburn orientation relationship.

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Section: Resultsmentioning

confidence: 99%

Microstructure Evolution of the Ti-46Al-8Nb-2.5V Alloy during Hot Compression and Subsequent Annealing at 900 °C

Cao,

Li,

et al. 2023

Materials

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show abstract

“…Laminated metal composites (LMCs) have attracted significant attention among researchers because of their excellent physical, chemical and mechanical properties. Various processing methods are applied to prepare LMCs, such as explosive bonding [1,2], extrusion bonding [3], roll bonding [4][5][6] and diffusion bonding [7]. Among these methods, roll bonding is considered to be a promising method for the fabrication of LMCs due to the continuous processing capacity of bulk materials, and many studies have been conducted on the roll bonding of various bi-metal or tri-metal LMCs, such as Al/Ti [6,7], Al/Mg [1], Cu/Ti [5], Ti/Steel [2], Ti/ Al/Nb [8] and Al/Mg/Ti [4,9].…”

Section: Introductionmentioning

confidence: 99%

Improving Ductility and Anisotropy by Dynamic Recrystallization in Ti/Mg Laminated Metal Composite

Xiao²,

Lin³

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

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Ti/Mg laminated metal composites (LMCs) were processed by hot roll bonding and subsequent annealing at 200 °C and 300 °C for 1 h, and the effect of dynamic recrystallization on the microstructure and anisotropy behavior was investigated in detail. The results revealed that, in both as-rolled and annealed Ti/Mg LMCs, the inhomogeneous distribution in the microstructure of Mg layers near the interface and near the center was related to the effect of friction between the roller and sheet surface and uncoordinated deformation between constituent layers. With increasing annealing temperature, Ti/Mg LMCs exhibited excellent elongation without sacrificing strength properties, which was mainly due to the improvement in bonding strength and the increasing strain gradient at the interface between soft and hard layers after annealing treatment. Besides, the increasing Schmid factors (SFs) of prismatic < a > slip and pyramidal < c + a > slip in Mg layers contributed to the improved plastic deformation ability of Ti/Mg LMCs. The experimental analysis indicated that the presence of Mg alloys resulted in the microstructure and mechanical properties of LMCs were different along various loading directions, and annealing treatment can effectively inhibit the anisotropic behavior of Ti/Mg LMCs resulting from the weakening of basal texture in the Mg layer.

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Exploring the probe offset window for dynamic support friction stir welding of Al/Ti dissimilar alloys

Zuo,

Liu,

et al. 2024

Int J Adv Manuf Technol

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Atomic diffusion mechanism and interface nanomechanics in the Al/Ti composite structures

Cited by 29 publications

References 68 publications

Microstructure Evolution of the Ti-46Al-8Nb-2.5V Alloy during Hot Compression and Subsequent Annealing at 900 °C

Microstructure Evolution of the Ti-46Al-8Nb-2.5V Alloy during Hot Compression and Subsequent Annealing at 900 °C

Improving Ductility and Anisotropy by Dynamic Recrystallization in Ti/Mg Laminated Metal Composite

Exploring the probe offset window for dynamic support friction stir welding of Al/Ti dissimilar alloys

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