Microstructural characterization and mechanical properties of TiC/near-α Ti composite obtained at slow cooling rate

Qi, Ji; Chang, Yu-Jen; He, Yuan; Wei, Fuxiang; Meng, Qinglin; Wei, Zunjie

doi:10.1016/j.matchar.2016.06.006

Cited by 28 publications

(6 citation statements)

References 32 publications

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“…Erlin et al 24 studied the interface between TiC particles and a-titanium formed during solidification and found a very smooth interface and orientation relationship of 011 ½ TiC== 01 10 Â Ã a with a low crystal mismatch of d = 7.9%. Qi et al 25 26 predicted that the order of potency between various nuclei is identical to the order of the reciprocal of the disregistry (mismatch) between the nuclei and the forming crystal on low index planes of similar atomic arrangement. Reynolds and Totttle 27 reported that powdered metals possessing similar crystal structures as the metal being cast were effective nucleants when the disregistry was less than 5-10%.…”

Section: Effect Of Carbon On Microstructure and Grain Refinementmentioning

confidence: 99%

Trace Carbon Addition to Refine Microstructure and Enhance Properties of Additive-Manufactured Ti-6Al-4V

Mereddy

Bermingham

Kent

et al. 2018

JOM

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Carbon is a powerful alloying element for titanium alloys. In this work, trace carbon is alloyed with Ti-6Al-4V during wire + arc additive manufacturing, and the effects on the solidification process, microstructure and mechanical properties are explored. With between 0.03 wt.% and 0.41 wt.% carbon, the prior-b grain size and a-lath length reduce by factors of 5-6 which is attributed to separate grain refining mechanisms. Alloying Ti-6Al-4V with up to 0.1 wt.% carbon improved both the tensile strength and ductility, but higher carbon additions were associated with excessive carbide formation and severe embrittlement.

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Section: Effect Of Carbon On Microstructure and Grain Refinementmentioning

confidence: 99%

Trace Carbon Addition to Refine Microstructure and Enhance Properties of Additive-Manufactured Ti-6Al-4V

Mereddy

Bermingham

Kent

et al. 2018

JOM

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“…Small amounts of TiC exhibited equiaxed or near-equiaxed shape, which corresponds to primary TiC [25]. Research indicated that TiC mainly displays equiaxed or near-equiaxed morphology in 10 vol.% TiC/Ti-6Al-3Sn-3.5Zr-0.4Mo-0.75Nb-0.35Si and 10 vol.% TiC/Ti-6Al-2Zr-1.5Mo-1V composites [19][20][21][22][23][24][25][26]. With the increase in Zr contents to 9% in this study, the volume fraction of primary TiC decreases.…”

Section: Phase Identificationmentioning

confidence: 96%

“…Hence, in order to produce TMCs castings with high tensile properties, the lamellar microstructure should be selected. It is well established that lamellar microstructure is formed during cooling from above the β-transus temperature in TMCs [20][21][22][23][24]. Therefore, only the cool-2 of 10 ing process is controlled; α phase size in the lamellar microstructure can be controlled quantitatively.…”

Section: Introductionmentioning

confidence: 99%

Control of the Lamellar Structure and Analysis of Tensile Properties of TiC/Ti-6Al-3Sn-9Zr-1.5Mo Composite Produced by In Situ Casting Technique

Zhu

Dong

Liu

et al. 2021

Metals

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In the present paper, new heat treatment was performed on 10 vol.% TiC/Ti-6Al-3Sn-9Zr-1.5Mo composite fabricated by an in situ casting technique. The aim is to obtain fully lamellar structure in matrix, control the lamellar structure quantitatively and understand the variation of the tensile properties of as-cast and heat-treated composites. For as-cast composite, matrix exhibited fully lamellar structure with some extent of basket-weave characteristics, and reinforcement was mainly in fine rod and strip shape. After β heat treatment, matrix microstructure was refined visibly. As the new cooling method was employed, wider α lath in matrix was obtained. The composite with very fine lamellar structure showed better yield strength (YS) in comparison with that with coarse lamellar microstructure below 650 °C. At 700 °C, fine grain strengthening cannot exert effective influence on tensile strength. It is proved that the enhanced YS is mainly ascribed to the refinement of α lath at ambient temperature. The heat-treated composites with wider α lath displayed excellent ductility at ambient temperature. Above 600 °C, the effect of α phase size on tensile elongation was negligible in the heat-treated composites, since matrix was softened.

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“…Titanium carbide (TiC)-reinforced near- α Ti alloys have potential for use in components that bear large bending moments in aeronautics because of their high tensile fracture strength and Young’s modulus. TiC mostly dissolves in the matrix alloy during thermomechanical processing producing solid-solutions that enhance the alloys’ mechanical properties (Qi et al , 2016; Zhang et al , 2007). Research on TiC/Ti-1100 showed TiC particle strengthening effect is more significant between 1,273 and 1,423 K, and flow stress declines significantly at 10 – 1 s −1 or 10 −2 s −1 strain rates and 1,373 or 1,423 K during hot compression (Ma et al , 2016).…”

Section: Mechanical Properties Of Near-α Titanium Alloysmentioning

confidence: 99%

Mechanical properties of near alpha titanium alloys for high-temperature applications - a review

Tabie

Wang

et al. 2020

AEAT

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Purpose This paper aims to present a broad review of near-a titanium alloys for high-temperature applications. Design/methodology/approach Following a brief introduction of titanium (Ti) alloys, this paper considers the near-α group of Ti alloys, which are the most popular high-temperature Ti alloys developed for a high-temperature application, particularly in compressor disc and blades in aero-engines. The paper is relied on literature within the past decade to discuss phase stability and microstructural effect of alloying elements, plastic deformation and reinforcements used in the development of these alloys. Findings The near-a Ti alloys show high potential for high-temperature applications, and many researchers have explored the incorporation of TiC, TiB SiC, Y2O3, La2O3 and Al2O3 reinforcements for improved mechanical properties. Rolling, extrusion, forging and some severe plastic deformation (SPD) techniques, as well as heat treatment methods, have also been explored extensively. There is, however, a paucity of information on SiC, Y2O3 and carbon nanotube reinforcements and their combinations for improved mechanical properties. Information on some SPD techniques such as cyclic extrusion compression, multiaxial compression/forging and repeated corrugation and straightening for this class of alloys is also limited. Originality/value This paper provides a topical, technical insight into developments in near-a Ti alloys using literature from within the past decade. It also outlines the future developments of this class of Ti alloys.

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Microstructural characterization and mechanical properties of TiC/near-α Ti composite obtained at slow cooling rate

Cited by 28 publications

References 32 publications

Trace Carbon Addition to Refine Microstructure and Enhance Properties of Additive-Manufactured Ti-6Al-4V

Trace Carbon Addition to Refine Microstructure and Enhance Properties of Additive-Manufactured Ti-6Al-4V

Control of the Lamellar Structure and Analysis of Tensile Properties of TiC/Ti-6Al-3Sn-9Zr-1.5Mo Composite Produced by In Situ Casting Technique

Mechanical properties of near alpha titanium alloys for high-temperature applications - a review

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