Reinforcement size dependence of mechanical properties and strengthening mechanisms in diamond reinforced titanium metal matrix composites

Saba, Farhad; Zhang, Faming; Liu, Suli; Liu, Tengfei

doi:10.1016/j.compositesb.2018.12.014

Cited by 140 publications

(41 citation statements)

References 68 publications

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“…Therefore, the mismatch in CTE can result in prismatic punching of dislocations at the interface, improving the strength of composite [ 45 ]. The strengthening of composite due to mismatch in CTE can be expressed as [ 46 ]:

where Δ σ CTE is the improved yield strength due to CTE mismatch, α is a constant of 1.25 [ 46 ], G m is the shear modulus of matrix (45.1 GPa [ 44 ]), b is burger vector of matrix (~0.29 nm [ 47 ]), ΔT is the change in temperature (980 °C), C Ti is the CTE of composite matrix (11.6 × 10 −6 °C −1 ), C r is the CTE of GO (−8 × 10 −6 °C −1 of graphene is used here), d r is the average size of GO (10 μm). From this equation, it is clear that the size of GO influences the effect of reinforcement greatly and large GO sheets can weaken the strengthening effected by mismatch in CTE.…”

Section: Discussionmentioning

confidence: 99%

Microstructure and Tensile Properties of Graphene-Oxide-Reinforced High-Temperature Titanium-Alloy-Matrix Composites

Chen

et al. 2020

Materials

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In this study, graphene-oxide (GO)-reinforced Ti–Al–Sn–Zr–Mo–Nb–Si high-temperature titanium-alloy-matrix composites were fabricated by powder metallurgy. The mixed powders with well-dispersed GO sheets were obtained by temperature-controlled solution mixing, in which GO sheets adsorb on the surface of titanium alloy particles. Vacuum deoxygenating was applied to remove the oxygen-containing groups in GO, in order to reduce the introduction of oxygen. The compact composites with refined equiaxed and lamellar α phase structures were prepared by hot isostatic pressing (HIP). The results show that in-situ TiC layers form on the surface of GO and GO promotes the precipitation of hexagonal (TiZr)6Si3 particles. The composites exhibit significant improvement in strength and microhardness. The room-temperature tensile strength, yield strength and microhardness of the composite added with 0.3 wt% GO are 9%, 15% and 27% higher than the matrix titanium alloy without GO, respectively, and the tensile strength and yield strength at 600 °C are 3% and 21% higher than the matrix alloy. The quantitative analysis indicates that the main strengthening mechanisms are load transfer strengthening, grain refinement and (TiZr)6Si3 s phase strengthening, which accounted for 48%, 30% and 16% of the improvement of room-temperature yield strength, respectively.

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Section: Discussionmentioning

confidence: 99%

Microstructure and Tensile Properties of Graphene-Oxide-Reinforced High-Temperature Titanium-Alloy-Matrix Composites

Chen

et al. 2020

Materials

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“…[ 4,73 ] Decreasing the size of reinforcements and increasing the aspect ratio are also beneficial to improve the mechanical properties. [ 1b,74 ] Furthermore, the new strategy of tailoring novel network and then multiscale architectures has been reported to modify the mechanical property of DRTMCs. [ 7,11,14 ]…”

Section: Microstructures Of Architectured Drtmcsmentioning

confidence: 99%

Multiscale Architecture and Superior High‐Temperature Performance of Discontinuously Reinforced Titanium Matrix Composites

Huang

et al. 2020

Advanced Materials

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Discontinuously reinforced titanium matrix composites (DRTMCs), as one of the most important metal matrix composites (MMCs), are expected to exhibit high strength, elastic modulus, high‐temperature endurability, wear resistance, isotropic property, and formability. Recent innovative research shows that tailoring the reinforcement network distribution totally differently from the conventional homogeneous distribution can not only improve the strengthening effect but also resolve the dilemma of DRTMCs with poor tensile ductility. Based on the network architecture, multiscale architecture, for example, two‐scale network and laminate‐network microstructure can further inspire superior strength, creep, and oxidation resistance at elevated temperatures. Herein, the most recent developments, which include the design, fabrication, microstructure, high‐temperature performance, strengthening mechanisms, and future research opportunities for DRTMCs with multiscale architecture, are captured. In this regard, the service temperature can be increased by 200 °C, and the creep rupture time by 59‐fold compared with those of conventional titanium alloys, which can meet the urgent demands of lightweight nickel‐based structural materials and potentially replace nickel base superalloys at 600–800 °C to reduce weight by 45%. In fact, multiscale architecture design strategy will also favorably open a new era in the research of extensive metallic materials for improved performances.

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“…Saba et al [34] reported that the elastic modulus difference between the matrix and reinforcement Table 3 presents the room-temperature compressive properties of all three compositions. Figure 7 shows the behavior of engineering compressive stress-strain curves at room temperature.…”

Section: Microstructural Anlysismentioning

confidence: 99%

Mechanical Characterization of Graphene Nanoplatelets-Reinforced Mg-3Sn Alloy Synthesized by Powder Metallurgy

Kumar¹,

Skotnicová²,

Mallick³

et al. 2020

Preprint

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The present study investigated the effects of alloying and nano-reinforcement on the mechanical properties (microhardness, tensile strength, and compressive strength) of Mg-based alloys and composites. Pure Mg, Mg-3Sn alloy, and Mg-3Sn+0.2GNP alloy-nanocomposite were synthesized by powder metallurgy followed by hot extrusion. The microstructural characteristics of the bulk extruded samples were explored using X-ray diffraction, field-emission scanning electron microscopy, and optical microscopy and their mechanical properties were compared. The microhardness, tensile strength, and compressive strength of the Mg-3Sn alloy improved when compared to those of monolithic Mg sample and further improvements were displayed by Mg-3Sn+0.2GNP alloy-nanocomposite. No significant change in the compressive strain to failure was observed in both the alloy and the alloy-nanocomposite with respect to that of the pure Mg sample. However, an enhanced tensile strain to failure was displayed by both the alloy and the alloy-nanocomposite.

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Reinforcement size dependence of mechanical properties and strengthening mechanisms in diamond reinforced titanium metal matrix composites

Cited by 140 publications

References 68 publications

Microstructure and Tensile Properties of Graphene-Oxide-Reinforced High-Temperature Titanium-Alloy-Matrix Composites

Microstructure and Tensile Properties of Graphene-Oxide-Reinforced High-Temperature Titanium-Alloy-Matrix Composites

Multiscale Architecture and Superior High‐Temperature Performance of Discontinuously Reinforced Titanium Matrix Composites

Mechanical Characterization of Graphene Nanoplatelets-Reinforced Mg-3Sn Alloy Synthesized by Powder Metallurgy

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