Sintered Ti–Fe alloys with in situ synthesized TiC dispersoids

Chen, Bor-Yuan; Hwang, K. S.

doi:10.1016/j.msea.2012.02.007

Cited by 16 publications

(8 citation statements)

References 19 publications

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“…Newly developed alloys are often compared with this alloy. Unlike in other studies where full substitution of vanadium, an isomorphous beta stabiliser, is done with either iron, chromium, manganese or other cheaper eutectoid stabilisers [22,[29][30][31], the partial replacement of vanadium with iron adopted in this study was aimed at suppressing the formation of intermetallic compound which is the equilibrium phase that is formed when eutectoid formers such as iron, chromium, manganese, nickel are used as beta stabilisers. It was reported that the use of both isomorphous and eutectoid beta stabilising elements such as iron and molybdenum could suppress the formation of intermetallic compound in beta titanium alloys [32].…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviour of low-cost Ti–4.5Al–xV–yFe alloys in sodium chloride and sulphuric acid solutions

Bodunrin

Chown

Merwe

et al. 2019

Corrosion Engineering, Science and Technology

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The electrochemical behaviour of low-cost α+β Ti-4.5Al-xV-yFe (where x + y = 4; x = 1-3; and y = 1-3) alloys and commercial Ti-6Al-4V alloy was compared in sodium chloride and sulphuric acid solutions. The low-cost alloys were developed by partial substitution of vanadium with iron and the reduction in aluminium content from 6 to 4.5 wt-%. The influence of iron addition and reduction in aluminium content on the corrosion performance of the experimental alloys was assessed via open circuit potential, potentiodynamic polarisation measurements and scanning electron microscopy. The results show that partial replacement of vanadium with up to 3 wt-% iron and the reduction in aluminium content yielded superior corrosion resistance in some of the low-cost alloys when compared with the commercial Ti-6Al-4V alloy. The Ti-4.5Al-1V-3Fe experimental alloy could serve as an alternative low-cost alloy to commercial Ti-6Al-4V alloy in a number of land-based applications such as marine, chemical and petrochemical industries.

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Section: Introductionmentioning

confidence: 99%

Corrosion behaviour of low-cost Ti–4.5Al–xV–yFe alloys in sodium chloride and sulphuric acid solutions

Bodunrin

Chown

Merwe

et al. 2019

Corrosion Engineering, Science and Technology

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“…precipitates enhanced the tensile strength but degraded the elongation of the as-sintered samples significantly. It has been shown that titanium carbides can increase the strength of Ti and its alloys through precipitation strengthening[47][48][49].…”

mentioning

confidence: 99%

Microstructure and mechanical behavior of metal injection molded Ti–Nb binary alloys as biomedical material

Zhao

Chang

Ebel

et al. 2013

Journal of the Mechanical Behavior of Biomedical Materials

136

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The application of titanium (Ti) based biomedical materials which are widely used at present, such as commercially pure titanium (CP-Ti) and Ti-6Al-4V, are limited by the mismatch of Young's modulus between the implant and the bones, the high costs of products, and the difficulty of producing complex shapes of materials by conventional methods. Niobium (Nb) is a non-toxic element with strong β stabilizing effect in Ti alloys, which makes Ti-Nb based alloys attractive for implant application. Metal injection molding (MIM) is a cost-efficient near-net shape process. Thus, it attracts growing interest for the processing of Ti and Ti alloys as biomaterial. In this investigation, metal injection molding was applied to the fabrication of a series of Ti-Nb binary alloys with niobium content ranging from 10wt% to 22wt%, and CP-Ti for comparison. Specimens were characterized by melt extraction, optical microscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and transmission electron microscopy (TEM). Titanium carbide formation was observed in all the as-sintered Ti-Nb binary alloys but not in the as-sintered CP-Ti. Selected area electron diffraction (SAED) patterns revealed that the carbides are Ti2C. It was found that with increasing niobium content from 0% to 22%, the porosity increased from about 1.6% to 5.8%, and the carbide area fraction increased from 0% to about 1.8% in the as-sintered samples. The effects of niobium content, porosity and titanium carbides on mechanical properties have been discussed. The as-sintered Ti-Nb specimens exhibited an excellent combination of high tensile strength and low Young's modulus, but relatively low ductility.

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“…In the BSE image, the β-Ti appears as a thick white layer The sintering temperature was above the beta transus and as the α-phase nucleates during cooling, it rejects Fe into the adjoining β phase which has more solubility for Fe. This stabilises the β-phase and as it transforms to the α-phase during cooling, the lamellae form with the retained β in between α grains [26]. The presence of the β-phase along the boundaries of α grains restricts their growth and this contributes to grain refining.…”

Section: Microstructure and Densitymentioning

confidence: 99%

A novel spark plasma sintering route to process high-strength Ti–4Al–2Fe/TiB nano-composite

Chaudhari

Bauri

2018

Materials Science and Technology

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Ti–4Al–2Fe alloy and Ti–4Al–2Fe/TiB nano-composite were processed by a novel spark plasma sintering route. KBF4 was used as an alternative and inexpensive boron precursor to form TiB reinforcement in situ during sintering. Fe was used as an alternative to vanadium to make the ( α + β) Ti matrix. The processed Ti–4Al–2Fe alloy exhibited excellent mechanical properties (CS = 1798 MPa). The TiB whiskers were distributed homogeneously and were fine (widths 130 nm and lengths from 100 nm to 3 µm). No residual TiB2 was found in the composite, in contrast with other methods. The TiB homogenised and refined the microstructure, while the hardness (710 HV), compressive strength (2414 MPa) and elastic modulus (140 GPa) all increased significantly when compared to the unreinforced alloy.

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Sintered Ti–Fe alloys with in situ synthesized TiC dispersoids

Cited by 16 publications

References 19 publications

Corrosion behaviour of low-cost Ti–4.5Al–xV–yFe alloys in sodium chloride and sulphuric acid solutions

Corrosion behaviour of low-cost Ti–4.5Al–xV–yFe alloys in sodium chloride and sulphuric acid solutions

Microstructure and mechanical behavior of metal injection molded Ti–Nb binary alloys as biomedical material

A novel spark plasma sintering route to process high-strength Ti–4Al–2Fe/TiB nano-composite

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