High temperature deformation and microstructural evolution of core-shell structured titanium alloy

Ma, Tengfei; Zhou, Xing; Du, Yan; Li, L.; Zhang, L.C.; Zhang, Y.S.; Zhang, P.X.

doi:10.1016/j.jallcom.2018.10.101

Cited by 13 publications

(6 citation statements)

References 24 publications

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“…After aging at 700 • C in Figure 4b, the α lamellar prevent the dislocation movement, and dislocation itself accumulates [20] at the boundary of the adjacent α lamellar crystals. With the increase in the aging temperature, the interlacing effect observed between the dislocation and lamellar is further enhanced in combination with Figure 4c,f, A high-density dislocation structure similar to the dislocation wall is then formed as a result [21].…”

Section: Microstructure Evolution During Aging Processmentioning

confidence: 66%

Evolution on the Microstructure and Mechanical Properties of a New Multicomponent Near-Alpha Titanium Alloy after Rolling and Heat Treatments

Han

Xiang

Ma³

et al. 2023

Metals

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Near-alpha titanium alloys are widely used in aeroengine blades due to their excellent specific strength and mechanical properties. The mechanical properties of near-α titanium alloys are closely related to the evolution of the microstructure and precipitates. In this paper, the microstructure and mechanical properties of a new type of multi-component near-α titanium alloy sheet after rolling, 700 °C aging, and 800 °C aging were studied. The results show that the strength of the alloy after aging at 700 °C increases from 1156 MPa to 1304 MPa, respectively, but decreases to 1246 MPa with the aging temperature increasing. The ductility of the alloy aged at 700 °C is lower than that of the rolled state, but the ductility increases slightly with the aging temperature increasing. The effect of aging heat treatment on the microstructure and precipitation behavior of alloy plates has been studied and compared with alloys before aging. After heat treatment, the content of primary α decreases from 25% to 5%, respectively. Two kinds of silicide precipitate at different positions, with the large-size spherical silicide being (Ti, Zr, Nb)5Si3, and the small-size fusiform silicide being (Ti, Zr, Nb)6Si3, respectively. Ti3Al was precipitated in the primary α phase, during the aging process. The silicides exhibit the strengthening effect on the alloy, but the effect weakens when the silicides grow up. The loss in ductility is mainly attributed to the precipitation of the α2 phase after aging treatment. However, ductility is improved after applying higher aging temperatures as the size of the α2 phase becomes smaller, and the distribution of them tends to become dispersed.

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Section: Microstructure Evolution During Aging Processmentioning

confidence: 66%

Evolution on the Microstructure and Mechanical Properties of a New Multicomponent Near-Alpha Titanium Alloy after Rolling and Heat Treatments

Han

Xiang

Ma³

et al. 2023

Metals

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“…After solution treatment, ST2 exhibited a higher tensile strength and a higher strain compared with ST2′, suggesting that the evolution of the interface microstructure in the composite contributed to the improvement of both the ductility and the strength. FSP and heat treatment were applied to fabricate this AMC in this investigation, the processing temperature of the composite was low due to the solid-state processing technique for FSP [ 32 , 34 , 35 , 36 ], and the solution treatment was performed at 525 °C. Based on the microstructure of the as-FSPed AMCs, a core–shell microstructure was achieved for the HEA/Al interface in the composite via heating treatment, and a long solution time can lead to a wide transition zone at the edge of the HEA particles.…”

Section: Discussionmentioning

confidence: 99%

Effects of Heat Treatment on the Interface Microstructure and Mechanical Properties of Friction-Stir-Processed AlCoCrFeNi/A356 Composites

Wang

et al. 2023

Materials

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Equiatomic AlCoCrFeNi high-entropy alloy (HEA) has gained significant interest in recent years because of its excellent mechanical properties. A356 aluminum alloy reinforced by AlCoCrFeNi HEA particles was fabricated by friction stir processing (FSP) and subsequent heat treatment. Solution and aging treatments were specially performed for the composites to control the interface microstructure, and interfacial microstructure and tensile properties were explored at different conditions. The interface between the matrix and HEA particles showed a dual-layered core–shell structure and the thickness of the shell region increased with the solution time. The microstructure located in the shell layers consisted of a solid solution with increasing aluminum content, in which a radial-shaped solid solution phase formed in the region close to the core of the HEA particle and scattered solid solution grains with high Ni content formed in the region close to the matrix alloy. The gradient of composition and microstructure across the HEA/Al interface can be obtained through heat treatment, and an optimal interface bonding state and mechanical property were obtained after solution treatment for 2 h. Compared with FSPed A356 aluminum alloy, the FSPed composite enhanced the tensile stress by 60 MPa and the stain by 5% under the optimized conditions. The overgrowth of the shell layer decreased both the tensile strength and the ductile greatly due to the formation of a radial-shaped solid solution phase in the shell region.

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“…the ratio of strength to density), excellent corrosion resistance, and superior biocompatibility . During the development of Ti, most Ti products, such as commercially pure Ti (CP–Ti), Ti alloys, and Ti‐based composites, have been designed for the industries of aerospace, military, automobiles, medicine, jewelry, and mobile phones. Most importantly, due to the low density, high strength, high corrosion resistance, complete inertness to body environment, superior biocompatibility, low elastic modulus, high capacity to join with bone and other tissues, Ti and its alloys are regarded as the highly desirable choice for orthopaedic implants .…”

Section: Introductionmentioning

confidence: 99%

A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

2019

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Compared with stainless steel and Co-Cr-based alloys, Ti and its alloys are widely used as biomedical implants due to many fascinating properties, such as superior mechanical properties, strong corrosion resistance, and excellent biocompatibility. After briefly introducing several most commonly used biomedical materials, this article reviews the recent development in Ti alloys and their biomedical applications, especially the low-modulus β-type Ti alloys and their design methods. This review also systemically investigates the recently attractive progress in preparation of biomedical Ti alloys, including additive manufacturing, porous powder metallurgy, and severe plastic deformation, applied in the manufacturing and the influenced microstructures and properties. Nevertheless, there are still some problems with the long-term performance of Ti alloys, and therefore several surface modification methods are reviewed to further improve their biological activity, wear resistance, and corrosion resistance. Finally, the biocompatibility of Ti and its alloys is concluded. Summarizing the findings from literature, future prediction is also conducted. Darmstadt. His current research interest is focusing on the metal additive manufacturing (e.g. selective laser melting, electron beam melting), titanium alloys and composites, and processing-microstructure-properties in high-performance materials.

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High temperature deformation and microstructural evolution of core-shell structured titanium alloy

Cited by 13 publications

References 24 publications

Evolution on the Microstructure and Mechanical Properties of a New Multicomponent Near-Alpha Titanium Alloy after Rolling and Heat Treatments

Evolution on the Microstructure and Mechanical Properties of a New Multicomponent Near-Alpha Titanium Alloy after Rolling and Heat Treatments

Effects of Heat Treatment on the Interface Microstructure and Mechanical Properties of Friction-Stir-Processed AlCoCrFeNi/A356 Composites

A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

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