Orientation relationship in a Ti/TiB metal-matrix composite

Ozerov, Maxim; Klimova, M.; Vyazmin, A. V.; Stepanov, Nikita; Zherebtsov, Sergey

doi:10.1016/j.matlet.2016.09.124

Cited by 41 publications

(16 citation statements)

References 14 publications

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“…Due to high heating rate and high pressures, the spark plasma sintering (SPS) process can be used for powder consolidation at relatively low temperatures and for short time intervals, thereby preserving a very fine microstructure in the specimen [8]. Hard fibers of TiB increase the strength and hardness of TMC, however the ductility of the composite can decrease to nearly zero [9,10]. Some improvement in both ductility and technological properties was attained in thermomechanically treated TMCs [11][12][13][14][15][16][17] due to the shortening and redistribution of TiB whiskers, along with the development of dynamic recrystallization in the titanium matrix.…”

Section: Materials and Proceduresmentioning

confidence: 99%

“…Due to high heating rate and high pressures, the spark plasma 2 of 10 sintering (SPS) process can be used for powder consolidation at relatively low temperatures and for short time intervals, thereby preserving a very fine microstructure in the specimen [8]. Hard fibers of TiB increase the strength and hardness of TMC, however the ductility of the composite can decrease to nearly zero [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Behavior and Microstructure Evolution of a Ti-15Mo/TiB Titanium–Matrix Composite during Hot Deformation

Zherebtsov

Ozerov

Klimova

et al. 2019

Metals

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A Ti-15Mo/TiB titanium–matrix composite (TMC) was produced by spark plasma sintering at 1400 °C under a load of 40 MPa for 15 min using a Ti-14.25(wt.)%Mo-5(wt.)%TiB2 powder mixture. Microstructure evolution and mechanical behavior of the composite were studied during uniaxial compression at room temperature and in a temperature range of 500–1000 °C. At room temperature, the composite showed a combination of high strength (the yield strength was ~1500 MPa) and good ductility (~22%). The microstructure evolution of the Ti-15Mo matrix was associated with the development of dynamic recovery at 500–700 °C and dynamic recrystallization at higher temperatures (≥800 °C). The apparent activation energy of the plastic deformation was calculated and a processing map for the TMC was constructed using the obtained results.

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Section: Materials and Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior and Microstructure Evolution of a Ti-15Mo/TiB Titanium–Matrix Composite during Hot Deformation

Zherebtsov

Ozerov

Klimova

et al. 2019

Metals

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“…Individual grains cannot be distinguished in the microstructure, however the size of areas with relatively low dislocation density (i.e., the space between areas with a large number of the TiB particles and high dislocation density) was~1-1.5 µm. The TiB whiskers had an irregular hexagonal shape (Figure 3b) with sides parallel to the (100), (101) and (101) planes [28]. Many stacking faults were observed in the (100) plane of the TiB whisker.…”

Section: Initial Microstructurementioning

confidence: 99%

Effect of High-Pressure Torsion on Structure and Microhardness of Ti/TiB Metal–Matrix Composite

Zherebtsov

Ozerov

Stepanov

et al. 2017

Metals

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Effect of high-pressure torsion (HPT) at 400 • C on microstructure and microhardness of a Ti/TiB metal-matrix composite was studied. The starting material was produced by spark plasma sintering of a mixture of a pure Ti and TiB 2 (10 wt %) powders at 1000 • C. The microstructure evolution during HPT was associated with an increase in dislocation density and substructure development that resulted in a gradual microstructure refinement of the Ti matrix and shortening/redistribution of TiB whiskers. After five revolutions, a nanostructure with (sub) grain size of~30 nm was produced in Ti matrix. The microhardness increased with strain attaining the value~520 HV after five revolutions. The contribution of different hardening mechanisms into the hardness of the Ti/TiB metal-matrix composite was quantitatively analyzed.

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“…At the same time, the presence of the TiB hardening phase in the composite results not only in high strength but also in insufficient ductility, especially at low temperatures [5][6][7][8]. One of the possible approaches to increase the ductility of the Ti/TiB composite is thermo-mechanical treatment.…”

Section: Introductionmentioning

confidence: 99%

Evolution of microstructure and mechanical properties of Ti-based metal-matrix composites during hot deformation

et al. 2020

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Two Ti-based composites, viz. Ti/TiB and Ti-15Mo/TiB were produced by spark plasma sintering using a Ti-10wt.%TiB2 powder mixture at 1000°C or Ti-14.25(wt.)%Mo-5(wt.)%TiB2 powder mixture at 1400°C, respectively. Specimens of the metal-matrix composites (MMCs) were subjected to uniaxial compression in the temperature range from 500 to 1050°С to determine processing window. Processing maps for both MMCs were constructed and analyzed. Mechanical behavior and microstructure evolution of both MMCs during multiaxial forging (MAF) at 700°C and at a strain rate 10-3 s-1 were studied. The flow stress for the Ti-15Mo/TiB MMC during MAF was ∼2 times higher than that for the Ti/TiB composite. Microstructure evolution during MAF of Ti/TiB MMC was associated with continuous dynamic recrystallization of the titanium matrix and shortening of TiB whiskers by a factor of ~3. The Ti-15Mo/TiB composite microstructure after did not demonstrate the development of recrystallization.

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Orientation relationship in a Ti/TiB metal-matrix composite

Cited by 41 publications

References 14 publications

Mechanical Behavior and Microstructure Evolution of a Ti-15Mo/TiB Titanium–Matrix Composite during Hot Deformation

Mechanical Behavior and Microstructure Evolution of a Ti-15Mo/TiB Titanium–Matrix Composite during Hot Deformation

Effect of High-Pressure Torsion on Structure and Microhardness of Ti/TiB Metal–Matrix Composite

Evolution of microstructure and mechanical properties of Ti-based metal-matrix composites during hot deformation

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