Titanium and Titanium Alloys

Been, Jenny; Grauman, J. S.

doi:10.1002/9780470872864.ch61

Cited by 14 publications

(13 citation statements)

References 73 publications

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“…It is reported in the literature that X-ray photo-electron spectroscopy (XPS) reveals that the formed amorphous oxide film mainly consists of TiO 2 68 in addition to two types of oxides: TiO and Ti 2 O 3 . 25,66,67 It has also been found that the oxides of titanium, TiO or Ti 2 O 3 , transform to more stable TiO 2 and come out on the electrode/electrolyte interface after a direct contact between Ti material and the electrolyte. 33 TiO 2 is an n-type semiconductor 69 and the corrosion of Ti is controlled kinetically by migration of oxygen vacancies through this film.…”

Section: 2c Tensile Propertiesmentioning

confidence: 99%

“…This behavior is due to the formation of a protective, hard and tightly adherent oxide film. 25 This oxide film offers chemical inertness to the Ti implants in human body fluid and guarantees its biocompatibility as a biomaterial. Therefore, Ti-based alloys with nontoxic and non-allergic elements such as Nb, Zr and other elements have been widely used to design new β-type Ti alloys.…”

Section: Introductionmentioning

confidence: 99%

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Influence of thermo-mechanical processing on microstructure, mechanical properties and corrosion behavior of a new metastable β-titanium biomedical alloy

et al. 2015

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This paper presents the results on the influence of different thermo-mechanical processing (TMP) on the mechanical properties and electrochemical behavior of new metastable β-alloy Ti-20.6Nb-13.6Zr-0.5V (TNZV). TMP included hot working in below β-transus, solution heat treatments at same temperature in different cooling rates in addition to aging. Depending upon the TMP conditions, a wide range of microstructures with varying spatial distributions and morphologies of equiaxed/elongated α, β phases were attained, allowing for a wide range of mechanical and electrochemical properties to be achieved. The corrosion behavior of studied alloy was evaluated in Ringer's solution at 37 • C using open-circuit potential-time and potentiodynamic polarization measurements.

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Section: 2c Tensile Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of thermo-mechanical processing on microstructure, mechanical properties and corrosion behavior of a new metastable β-titanium biomedical alloy

et al. 2015

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“…10 In contrast, titanium alloys are less corrosion resistant under reducing conditions such as hydrochloric (HCl), sulfuric (H 2 SO 4 ), and hydrobromic (HBr) acids. The effects of microstructure on the corrosion properties of titanium alloys have not been studied extensively.…”

Section: Introductionmentioning

confidence: 99%

“…Titanium and its alloys exhibit extraordinary corrosion resistance in strongly oxidizing environments such as nitric (HNO 3 ) and chromic (H 2 CrO 4 ) acid solutions. 10 The effectiveness of the Ti passive film is threatened by three fundamental problems: general dissolution in a reducing acid, localized breakdown of the oxide layer in the presence of detrimental anions such as chlorides or bromides, or mechanical interruption or depassivation. 10 In contrast, titanium alloys are less corrosion resistant under reducing conditions such as hydrochloric (HCl), sulfuric (H 2 SO 4 ), and hydrobromic (HBr) acids.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Ti-6Al-4V with Different Thermomechanical Treatments and Microstructures

et al. 2010

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The corrosion behavior of four different microstructures ofTi-6Al-4V with varying volume fractions of primary α (0, 10%~20%, 40%~50%, and ~90%) was investigated in sodium chloride (NaCl) and hydrochloric acid (HCl) solutions. The microstructure constituent morphologies and distributions were characterized with optical and scanning electron microscopy (SEM) while constituent compositions were determined with energy-dispersive x-ray (EDX) analysis. All four microstructures exhibited spontaneous passivity in 0.9% NaCl at 37°C and active/passive transitions in 1.5 M HCl at 37°C. Very little difference in corrosion rate was observed using potentiodynamic polarization curves and weight-loss tests. However, SEM analysis of corroded surfaces indicated that the fully lamellar structure (0% primary α) exhibited the worst attack. Analysis of surfaces after 48 h immersion in 3.5 M HCl revealed that α/b phase boundaries were preferential sites for corrosion attack. Also, b phase in lamellar structures exhibited preferential dissolution in comparison to α phase. The corrosion results are discussed in terms of microstructure and constituent composition. In particular, the extent of partitioning of vanadium to the b phase during heat treatment varies with the volume fractions of primary α and transform b, which affects the corrosion performance in aggressive environments.

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“…[16] However, the corrosion behavior of titanium alloys depends on the composition and the microstructural details. The presence of acicular structure was found to reduce the corrosion resistance of commercially pure Ti.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Friction Stir-Processed and Gas Tungsten Arc-Welded Ti-6Al-4V

Atapour

Pilchak

Frankel

et al. 2010

Metall Mater Trans A

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The corrosion behavior of the investment-cast Ti-6Al-4V alloy in 5-pct HCl solution was investigated after gas tungsten arc welding and friction stir (FS) processing. The FS-processed samples exhibited superior corrosion behavior compared with the base metal and the arc-welded samples. The inferior corrosion resistance of the arc weldment was attributed to the acicular a and b microstructure and the alloying element partitioning between the phases. This was confirmed by scanning electron microscopy evaluations of the surface of specimens that had been immersed 50 hours in 20-pct HCl at 308 K (35°C). In addition, the results indicated that vanadium as an alloying element has a detrimental effect on the corrosion performance of Ti6Al-4V alloy in an HCl solution.

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Titanium and Titanium Alloys

Cited by 14 publications

References 73 publications

Influence of thermo-mechanical processing on microstructure, mechanical properties and corrosion behavior of a new metastable β-titanium biomedical alloy

Influence of thermo-mechanical processing on microstructure, mechanical properties and corrosion behavior of a new metastable β-titanium biomedical alloy

Corrosion Behavior of Ti-6Al-4V with Different Thermomechanical Treatments and Microstructures

Corrosion Behavior of Friction Stir-Processed and Gas Tungsten Arc-Welded Ti-6Al-4V

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