Influence of cyclic thermal treatments on the oxidation behavior of Ti-6Al-2Sn-4Zr-2Mo alloy

Fargas, Gemma; Roa, J.J.; Sefer, Birhan; Pederson, Robert; Antti, Marta‐Lena; Mateo, A.

doi:10.1016/j.matchar.2018.08.049

Cited by 11 publications

(7 citation statements)

References 33 publications

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“…Among various methods of obtaining oxide layers, isothermal oxidation is of particular interest. This method makes it possible to obtain significantly thicker oxide layers than those obtained with the anodising method, which substantially affects mechanical and tribological properties and corrosion resistance [28][29][30]. An important issue concerning isothermal oxidation of titanium and its alloys is the selection of optimal thermal treatment parameters, which will make it possible to obtain oxide layers with suitable microstructure, thickness and adhesive properties.…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of titanium and the Ti-6Al-7Nb alloy after isothermal oxidation

Aniołek

2020

Surface Engineering

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The purpose of the study was to determine optimal oxidation parameters of titanium Grade 2 and Ti-6Al-7Nb alloy in order to obtain the best structural, mechanical and tribological characteristics of oxide layers. It has been shown that the morphology of oxide layers depends on the oxidation temperature and the continuity of layers increased as the oxidation temperature rose. The examinations of the phase composition after oxidation showed mainly the presence of TiO 2 in the crystallographic form of rutile. The phase composition of oxidised Ti-6Al-7Nb alloy was more complex (rutile, anatase, NbO, α-Al 2 O 3 ). Isothermal oxidation significantly increases the surface hardness of both titanium Grade 2 and Ti-6Al-7Nb alloy. Layers deposited on titanium Grade 2 were 6 times thicker compared to Ti-6Al-7Nb alloy. Tribological tests have shown that the presence of an oxide layer on the surface significantly improves poor tribological properties of titanium and Ti-6Al-7Nb alloy.

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Section: Introductionmentioning

confidence: 99%

Structure and properties of titanium and the Ti-6Al-7Nb alloy after isothermal oxidation

Aniołek

2020

Surface Engineering

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“…The Ti-based HEA experienced selective oxidation because of the high affinity Ti has for oxygen at high temperatures, making the alloying composition oxidize more rapidly than the Cu-based HEA (Guleryuz and Cimenoglu, 2009). The laser parameters also influenced the weight difference of the alloys, increasing with an increase in laser power from 1,400 to 1,600 W. The energy density, which increased from 58.3 J/mm2 to 80 J/mm 2 at 1,400 W to 1,600 W, was adequate to support the thermodynamic formation of solid solution phases that are resistant to thermal decomposition (Fargas et al, 2017). The high amount of Al in both alloys promotes the formation of Al 2 0 3 protective scales showing similarities with stainless steels (Xu et al, 2011;Pint et al, 2007;Brady et al, 2008).…”

Section: Thermal Oxidation Propertiesmentioning

confidence: 99%

Electrical resistivity and oxidation behavior of Cu and Ti doped laser deposited high entropy alloys

Dada

Popoola²,

Mathe³

et al. 2022

WJE

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Purpose In this study, AlCoCrFeNi–Cu (Cu-based) and AlCoCrFeNi–Ti (Ti-based) high entropy alloys (HEAs) were fabricated using a direct blown powder technique via laser additive manufacturing on an A301 steel baseplate for aerospace applications. The purpose of this research is to investigate the electrical resistivity and oxidation behavior of the as-built copper (Cu)- and titanium (Ti)-based alloys and to understand the alloying effect, the HEAs core effects and the influence of laser parameters on the physical properties of the alloys. Design/methodology/approach The as-received AlCoCrFeNiCu and AlCoCrFeNiTi powders were used to fabricate HEA clads on an A301 steel baseplate preheated at 400°C using a 3 kW Rofin Sinar dY044 continuous-wave laser-deposition system fitted with a KUKA robotic arm. The deposits were sectioned using an electric cutting machine and prepared by standard metallographic methods to investigate the electrical and oxidation properties of the alloys. Findings The results showed that the laser power had the most influence on the physical properties of the alloys. The Ti-based alloy had better resistivity than the Cu-based alloy, whereas the Cu-based alloy had better oxidation residence than the Ti-based alloy which attributed to the compositional alloying effect (Cu, aluminum and nickel) and the orderliness of the lattice, which is significantly associated with the electron transportation; consequently, the more distorted the lattice, the easier the transportation of electrons and the better the properties of the HEAs. Originality/value It is evident from the studies that the composition of HEAs and the laser processing parameters are two significant factors that influence the physical properties of laser deposited HEAs for aerospace applications.

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“…Cp-Ti ve Ti6Al4V alaşımının 48 saat 650 °C'deki ve Ti6Al4V için 48 saatte, 700 °C'deki XRD analizi sonuçları şekil 6'da verilmiştir. Titanyum oksit doğada farklı polimorflar da yani birden fazla kristal yapı da bulunmaktadır; bunlardan en çok tercih edilen ve kararlı olan TiO 2 formu rutiledir, diğer formları ise anatase ve brookittir [17,18]. Alınan XRD sonuçlarında numune yüzeyin de rutile ve anatase oluşumu görülmüştür.…”

Section: Deney Sonuçlarının Değerlendirilmesiunclassified

Ti6Al4V Alaşımı ve Saf Titanyumun (Cp-Ti) Oksidasyon Kinetiği

Ayday

2020

El-Cezeri Fen Ve Mühendislik Dergisi

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72 saat sürelerinde oksidasyon kinetiği davranışları incelenmiştir. Oksidasyon işlemi sonrası numune yüzeyleri X-ışınları difraksiyonu (XRD), taramalı elektron mikroskobu (SEM) yardımı ile incelenmiştir. Termal oksidasyon sonrasında yüzeylerde ince oksit tabakası oluşmuş ve metal içerisine oksijen difüzyonu gerçekleşmiştir. Oluşan oksit tabakası rutil ve anatas formundaki TiO 2 'dir. Yüzeyde oluşan oksit tabakasının kalınlığı, sıcaklık ve süreye bağlı olarak artmaktadır. Oksidasyona uğratılan numunelerin aktivasyon enerjileri hesaplanmıştır. Ti6Al4V için oksidasyon aktivasyon enerjisi 201.3kJ/mol, Cp-Ti için ise 269.4kJ/mol hesaplanmıştır.

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Influence of cyclic thermal treatments on the oxidation behavior of Ti-6Al-2Sn-4Zr-2Mo alloy

Cited by 11 publications

References 33 publications

Structure and properties of titanium and the Ti-6Al-7Nb alloy after isothermal oxidation

Structure and properties of titanium and the Ti-6Al-7Nb alloy after isothermal oxidation

Electrical resistivity and oxidation behavior of Cu and Ti doped laser deposited high entropy alloys

Ti6Al4V Alaşımı ve Saf Titanyumun (Cp-Ti) Oksidasyon Kinetiği

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