Rapid quenching of semisolid Ti-Cu alloys: Insights into globular microstructure formation and coarsening

Campo, Kaio Niitsu; Lopes, Éder Sócrates Najar; Parrish, Catherine; Caram, Rubens

doi:10.1016/j.actamat.2017.08.006

Cited by 31 publications

(10 citation statements)

References 43 publications

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“…1(a), Ti-10Mo and Ti-10Mo-1Cu alloys were characterized by α and β phases, while Ti-10Mo-3Cu and Ti-10Mo-5Cu showed a small amount of Ti 2 Cu co-existing with α and β phases. In addition, the content of Ti 2 Cu increased with an increase in Cu content, which was in agreement with the previous result [28]. Furthermore, as the Cu content increased, the intensity of the β phase became gradually higher, indicating that more β phases had been generated.…”

Section: Phase Constituents and Vickers Micro-hardnesssupporting

confidence: 92%

The effect of Cu content on corrosion, wear and tribocorrosion resistance of Ti-Mo-Cu alloy for load-bearing bone implants

Zhang

et al. 2020

Corrosion Science

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In this study, the effects of Cu content on wear, corrosion, and tribocorrosion resistance of Ti-10Mo-xCu alloy were investigated. Results revealed that hardness of Ti-10Mo-xCu alloy increased from 355.1±15.2 HV to 390.8±17.6 HV by increasing Cu content from 0% to 5%, much higher than CP Ti (106.6±15.1 HV) and comparable to Ti64 (389.7±13.9 HV). With a higher Cu content, wear and tribocorrosion resistance of Ti-10Mo-xCu alloys were enhanced, and corrosion resistance showed an initial increase with a subsequent decrease. Wear mechanisms under pure mechanical wear and tribocorrosion conditions of Ti-10Mo-xCu alloys were a combination of delamination, abrasion and adhesion wear.

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Section: Phase Constituents and Vickers Micro-hardnesssupporting

confidence: 92%

The effect of Cu content on corrosion, wear and tribocorrosion resistance of Ti-Mo-Cu alloy for load-bearing bone implants

Zhang

et al. 2020

Corrosion Science

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“…It can be seen that the as-cast Ti-Cu alloys are mainly composed of two phases, α-Ti and Ti 2 Cu phase, and no β phase is detected. A previous paper reported that Ti-Cu alloys with low Cu content underwent β → α-Ti + Ti 2 Cu eutectoid transformation, and β phase was difficult to retain at the room temperature, even after quenching [ 12 ]. The intensity of the diffraction peaks of the Ti 2 Cu phase gradually increases, indicating that the volume fraction of the Ti 2 Cu phase increases with the increase of Cu content.…”

Section: Resultsmentioning

confidence: 99%

“…Cu is an active eutectoid β stabilizer element in titanium alloys, and the melting temperature of the Ti-Cu alloy decreases with the increase of Cu content [ 11 , 12 ]. The addition of Cu element to titanium can favor casting and improve the mechanical properties of the products [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu Content on the Precipitation Behaviors, Mechanical and Corrosion Properties of As-Cast Ti-Cu Alloys

Wang

Wang³

et al. 2022

Materials

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Ti-Cu alloys have broad application prospects in the biomedical field due to their excellent properties. The properties of Ti-Cu alloys are strongly dependent on Cu content, microstructures, its Ti2Cu phase and its preparation process. The aim of this work is to investigate the effect of Cu content on the precipitation behaviors, mechanical and corrosion properties of the as-cast Ti-Cu alloys. The microstructures and phase evolution were characterized by SEM and TEM, and the properties were studied by tensile and electrochemical test. The results show that the volume fraction of Ti2Cu phase increases with the increase of Cu content. The Ti2Cu phase presents a variety of microscopic morphologies with different Cu content, such as rod, granular, lath and block shaped. The crystal orientation relationships between the Ti2Cu and α-Ti matrix in Ti-4Cu and Ti-10Cu alloys are (103)Ti2Cu//(0[11¯11)α-Ti, [3¯01]Ti2Cu//[21¯1¯0]α-Ti, and (103)Ti2Cu//(0002)α-Ti, [3¯31]Ti2Cu//[12¯10]α-Ti, respectively. The tensile strength, Vickers hardness and Young’s modulus of the Ti-Cu alloys increase with the increase of Cu content, whereas the elongation decreases. The fracture morphologies of these alloys reveal ductile, ductile-brittle hybrid, and cleavage brittle mode, respectively. The corrosion resistance of the Ti-Cu alloys in SBF solution can be described as: Ti-4Cu alloy > Ti-10Cu alloy > Ti-7Cu alloy. The volume fraction of Ti2Cu phases and the “protective barrier” provided by the fine lath Ti2Cu phases strongly affected the electrochemical performances of the alloys.

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“…The incorporation of a third phase (metallic type) will provide an improvement of properties such as compatibility, wear resistance and hardness. In reason of that titanium is ideal candidate due to it had been observed hard phases in the Cu-Ti system in the conventional alloy [18] throught the micrometric control of components. Laik et al [19] had reported that the control of the growth of the intermetallics as CuTi, CuTi 4 , Cu 4 Ti 3 and CuTi 2 promote to obtain different hard layers that could provide an adequate mechanical response and interaction of the components [20].…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on morphology and wear of a Cu-Ti-TiC MMC sintered by abnormal glow discharge

Bohórquez

Pérez

Sarmiento-Santos

et al. 2020

Mater. Res. Express

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Microstructure and tribological properties had been studied in a Cu-Ti-1%TiC MMC with titanium concentration of 10%, 15%, and 20%. The composite was manufactured following the pulvimetallurgical route that included: mechanical and ultrasonic mixing in 2-propanol, compaction at 400 MPa and sintering assisted by abnormal glow discharge in an atmosphere of 10% nitrogen and 90% argon. The discharge was established in the direct current regime and the voltage values were adjusted according to the sintering temperatures of 750°C and 850°C. The sintering process was carried out for 30 min and then cooled in the same atmosphere. As a result, a differentiated in morphology and wear properties were obtained in the sintered parts. At 750°C a microstructure characterized by the stability of Ti grains with intermetallic precipitates such as CuTi 2 and CuTi were observed at the interface with the matrix. On the other hand, the intermetallic phases as Cu 3 Ti, Cu 4 Ti and CuTi 2 had been detected in the sintered at 850°C. These phases were related to diffusive processes that occurred during the sintering, enhanced by the energy provided by the process. It had been observed that with increase of titanium content an improvement of the MMC tribological properties. In titanium contents of 20% at 750°C was estimated a wear coefficient of 2.7 × 10 −8 mm 3 .N −1 .m −1 with a track width of 312 μm. Despite the pores originated during the sintering of MMC at 850°C was found a wear coefficient value of 2.4 × 10 −8 mm 3 .N −1 .m −1 and a track size of 778 μm, related to the plastic deformation exerted on the porous structures during the wear process. Results of the tribological analysis lead that this compound may be applied in fields where the balance between adequate tribological properties and lightness are highly required such as the automotive, aeronautical and biomedical industries.

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Rapid quenching of semisolid Ti-Cu alloys: Insights into globular microstructure formation and coarsening

Cited by 31 publications

References 43 publications

The effect of Cu content on corrosion, wear and tribocorrosion resistance of Ti-Mo-Cu alloy for load-bearing bone implants

The effect of Cu content on corrosion, wear and tribocorrosion resistance of Ti-Mo-Cu alloy for load-bearing bone implants

Effect of Cu Content on the Precipitation Behaviors, Mechanical and Corrosion Properties of As-Cast Ti-Cu Alloys

Effect of temperature on morphology and wear of a Cu-Ti-TiC MMC sintered by abnormal glow discharge

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