Reference Module in Materials Science and Materials Engineering 2017
DOI: 10.1016/b978-0-12-803581-8.02542-x
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Intermetallics: Titanium Aluminides☆

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Cited by 11 publications
(10 citation statements)
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“…This is due to their interesting properties consisting of having lower density and a higher strength-to-weight ratio compared with Inconel-718. In addition, their higher strength at great temperatures and better corrosion and oxidation resistance in comparison with Ti6Al4V should not be underestimated [2]. The most promising alloys are found in the range of 40-48 aluminium atomic percentage, being formed by α 2 (Ti 3 Al) and γ(TiAl) phases [3].…”
Section: Introductionmentioning
confidence: 99%
“…This is due to their interesting properties consisting of having lower density and a higher strength-to-weight ratio compared with Inconel-718. In addition, their higher strength at great temperatures and better corrosion and oxidation resistance in comparison with Ti6Al4V should not be underestimated [2]. The most promising alloys are found in the range of 40-48 aluminium atomic percentage, being formed by α 2 (Ti 3 Al) and γ(TiAl) phases [3].…”
Section: Introductionmentioning
confidence: 99%
“…These alloys show high specific modulus and specific strength for temperatures higher than 600 • C and good oxidation resistance. In comparison to Ti6Al4V, whose creep limit is about 385 • C, titanium aluminides exhibit a creep limit higher than 1000 • C [3,4]. Moreover, titanium aluminide density is about 4 g/cm 3 , about half that of superalloys, which results in a weight reduction, leading to important fuel consumption savings.…”
Section: Introductionmentioning
confidence: 99%
“…In comparison to Ti6Al4V, whose creep limit is about 385 • C, titanium aluminides exhibit a creep limit higher than 1000 • C [3,4]. Moreover, titanium aluminide density is about 4 g/cm 3 , about half that of superalloys, which results in a weight reduction, leading to important fuel consumption savings. In contrast, titanium aluminides exhibit low ductility (<2%) and fracture toughness at room and low temperatures [5].…”
Section: Introductionmentioning
confidence: 99%
“…A influência das fases presentes nos aluminetos de titânio reflete nas propriedades das ligas, durante sua aplicação [108]. Por exemplo, nos aluminetos de titânio α2-Ti3Al, a ductilidade se mostra baixa, devido a falta de planos de deslizamento independentes nessa estrutura (hexagonal -hP8) e a pouca porcentagem de alumínio (20 -39% atômica), que contribui para o aumento da resistência mas diminuí a ductilidade [109], [112]. No caso para aumento de ductilidade, se faz necessário a presença de uma fase mais macia.…”
Section: Propriedadeunclassified
“…Com essa fração de alumínio, problemas como baixa ductilidade e resistência a corrosão são encontrados. Essa diminuição da ductilidade se deve a presença de duas fases, em geral em estrutura lamelar: α2-Ti3Al e γ-TiAl [112]. Apesar da baixa ductilidade devido ao grão grosseiro da estrutura, a presença da fase α2 que age como barreira para a movimentação, dificulta a locomoção das discordâncias na rede, assim um aumento na resistência a fadiga é observado [109].…”
Section: Propriedadeunclassified