Influence of matrix characteristics on tensile properties of in situ synthesized TiC/TA15 composite

Qi, Junlei; Wang, H.W.; Zou, Chaoying; Wei, Zunjie

doi:10.1016/j.msea.2012.05.092

Cited by 60 publications

(12 citation statements)

References 29 publications

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“…Small TiC particles can undertake higher load before final damage and spheroidised TiC can reduce the stress concentration and blunt the crack tips, which also favors the enhancement of room-temperature ductility. Similar conclusions were reported in previous literatures [29,30]. It should be noted that the simple heat treatment used in this work can be extended to TMCs reinforced with TiC particles to enhance their room-temperature ductility, which is the other novelty of the present work.…”

Section: T (°C)supporting

confidence: 88%

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

Chang

et al. 2016

Materials Characterization

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Section: T (°C)supporting

confidence: 88%

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

Chang

et al. 2016

Materials Characterization

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“…Furthermore, lamellar microstructure can more effectively impede the propagation of cracks generating in cracked reinforcements. Qi et al [19] also obtained similar results in TiC-TMCs. Hence, in order to produce TMCs castings with high tensile properties, the lamellar microstructure should be selected.…”

Section: Introductionmentioning

confidence: 54%

“…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%

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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“…Moreover, there is a small amount of equiaxed α phase. This is because the α phase exhibits equiaxed or near-equiaxed morphology in the composite when cooled from above β -transus temperature to ambient temperature at a low cooling rate [ 25 ], and the existence of equiaxed α is advantageous for the plasticity of composites [ 21 , 32 ].…”

Section: Resultsmentioning

confidence: 99%

“…Preparation of TiBw/TA15 composites can maintain the advantages of TA15 alloy and, at the same time, enhance its high-temperature performance. However, there are few published studies on TA15-based composites, and in these few studies only TiC particles are used as the reinforcement [ 24 , 25 , 26 ]. It is unfortunate that, to the best of author’s knowledge, there is no research on whisker-reinforced TA15 titanium matrix composites.…”

Section: Introductionmentioning

confidence: 99%

Room-Temperature and High-Temperature Tensile Mechanical Properties of TA15 Titanium Alloy and TiB Whisker-Reinforced TA15 Matrix Composites Fabricated by Vacuum Hot-Pressing Sintering

et al. 2017

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In this paper, the microstructure, the room-temperature and high-temperature tensile mechanical properties of monolithic TA15 alloy and TiB whisker-reinforced TA15 titanium matrix composites (TiBw/TA15) fabricated by vacuum hot-pressing sintering were investigated. The microstructure results showed that there were no obvious differences in the microstructure between monolithic TA15 alloy and TiBw/TA15 composites, except whether or not the grain boundaries contained TiBw. After sintering, the matrix microstructure presented a typical Widmanstätten structure and the size of primary β grain was consistent with the size of spherical TA15 titanium metallic powders. This result demonstrated that TiBw was not the only factor limiting grain coarsening of the primary β grain. Moreover, the grain coarsening of α colonies was obvious, and high-angle grain boundaries (HAGBs) were distributed within the primary β grain. In addition, TiBw played an important role in the microstructure evolution. In the composites, TiBw were randomly distributed in the matrix and surrounded by a large number of low-angle grain boundaries (LAGBs). Globularization of α phase occurred prior, near the TiBw region, because TiBw provided the nucleation site for the equiaxed α phase. The room-temperature and high-temperature tensile results showed that TiBw distributed at the primary β grain boundaries can strengthen the grain boundary, but reduce the connectivity of the matrix. Therefore, compared to the monolithic TA15 alloy fabricated by the same process, the tensile strength of the composites increased, and the tensile elongation decreased. Moreover, with the addition of TiBw, the fracture mechanism was changed to a mixture of brittle fracture and ductile failure (composites) from ductile failure (monolithic TA15 alloy). The fracture surfaces of TiBw/TA15 composites were the grain boundaries of the primary β grain where the majority of TiB whiskers distributed, i.e., the surfaces of the spherical TA15 titanium metallic powders.

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Influence of matrix characteristics on tensile properties of in situ synthesized TiC/TA15 composite

Cited by 60 publications

References 29 publications

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

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

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

Room-Temperature and High-Temperature Tensile Mechanical Properties of TA15 Titanium Alloy and TiB Whisker-Reinforced TA15 Matrix Composites Fabricated by Vacuum Hot-Pressing Sintering

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