Titanium Alloys for Aerospace Applications

Peters, M.; Kumpfert, J.; Ward, C.H.; Leyens, Christoph

doi:10.1002/adem.200310095

Cited by 707 publications

(271 citation statements)

References 9 publications

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“…In many cases it is important to ensure a set of properties, for example a combination of high fatigue strength, corrosion and erosion resistance along with a low specific weight of such items as high-load parts of power units and aircrafts. Ti alloys are widely used in practice for this purpose [1]. Ti alloys have a much higher specific strength as compared to refractory steels and Ni alloys [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced fatigue properties of Ti-6Al-4V alloy turbine blades via formation of ultra-fine grained structure and ion implantation of surface

Semenova

Smyslova

Селиванов

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. An overall approach to enhance service properties of Ti alloys is based on material nanostructuring in its volume and surface layer. In this work ultrafine-grained (UFG) structure is formed in Ti-6Al-4V alloy through equal channel angular pressing via the Conform scheme with subsequent drawing. Samples modelling the shape of blades are prepared. Their surface is subjected to ion implantation with N + . Fatigue tests are performed in the conditions imitating the stress-strain state of blades. It is shown the increasing the resistance of a high-cycle fatigue of blades due to formation of the UFG structure and subsequent surface modification in the material. The fatigue behaviour of the UFG alloy subjected to ion implantation is discussed.

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Section: Introductionmentioning

confidence: 99%

“…Ti alloys are widely used in practice for this purpose [1]. Ti alloys have a much higher specific strength as compared to refractory steels and Ni alloys [1,2]. Today Ti-6Al-4V alloy is the most widely used one due to favourable alloying [1,2].…”

Section: Introductionmentioning

confidence: 99%

Enhanced fatigue properties of Ti-6Al-4V alloy turbine blades via formation of ultra-fine grained structure and ion implantation of surface

Semenova

Smyslova

Селиванов

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Ti-6Al-4V titanium alloy was widely used in the aerospace and military industries due to its excellent specific strength, high shear modulus, low density and thermal expansion coefficient [1][2][3]. However, traditional manufacturing methods of Ti-6Al-4V titanium alloy, such as forging or cutting, which have the disadvantages of a high buy-to-fly ratio and low manufacturing flexibility, are not economical.…”

Section: Introductionmentioning

confidence: 99%

“…The laser additive manufacturing (LAM) process which fabricates Ti-6Al-4V titanium alloy with a near net shape has no restriction in the component shapes. It has been popular in recent studies [4][5][6][7] and has been widely used to fabricate complex components in aerospace and other industries [1]. The typical grain structure in the fabricated Ti-6Al-4V titanium alloy samples is coarse columnar prior β grains, which arise due to high temperature gradients and distribute approximately parallel to the building direction [8].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Ti-6Al-4V Fabricated by Vertical Wire Feeding with Axisymmetric Multi-Laser Source

Gong

Zhang

et al. 2017

Applied Sciences

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Vertical wire feeding with an axisymmetric multi-laser source (feeding the wire vertically into the molten pool) has exhibited great advantages over LAM (laser additive manufacturing) with paraxial wire feeding, which has an anisotropic forming problem in different scanning directions. This paper investigates the forming ability of vertical wire feeding with an axisymmetric multi-laser source, and the microstructure and mechanical properties of the fabricated components. It has been found that vertical wire feeding with an axisymmetric multi-laser source has a strong forming ability with no anisotropic forming problem when fabricating the complex parts in a three-axis machine tool. Most of the grains in the samples are equiaxed grains, and a small amount of short columnar grains exist which are parallel to each other. The microstructure of the fabricated samples exhibits a fine basket-weave structure and martensite due to the fast cooling rate which was caused by the small size of the molten pool and the additional heat dissipation from the feeding wire. The static tensile test shows that the average ultimate tensile strength is 1140 MPa in the scanning direction and 1115 MPa in the building direction, and the average elongation is about 6% in both directions.

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“…La combinación de la capacidad de obtener productos casi acabados y una maquinabilidad semejante a la aleación de la matriz [20] hace interesante la producción de compuestos particulados por mezcla de polvos elementales, con amplia aplicación en la industria automotriz [20 y 21] , la medicina [22 y 23] , en artículos deportivos [24] , aeronáutica [25] , defensa [26] y herramientas industriales.…”

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Matrix-reinforcement reactivity in P/M titanium matrix composites

Amigó¹,

Romero²,

Salvador³

et al. 2007

Rev. metal.

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La pulvimetalurgia siempre se ha mostrado como un proceso viable en la producción de componentes complejos con una minimización de la mecanización posterior de los mismos, por lo que representa una fuerte reducción de los costes de producción [1] . Esto se aplica en particular a materiales relativamente caros como las aleaciones de titanio [2 y 3] , donde resulta fundamental la minimización de las perdidas por mecanizado. Inicialmente, la pulvimetalurgia se ha considerado un método para la producción económica de componentes con su forma cercana a la final [4] . El titanio y aleaciones de titanio, sin embargo, no siempre pueden cumplir con estas expectativas, ya que ni son baratos ni su uso resulta generalizado [5 y 6] . No obstante, el alto coste de obtención de polvos y su posterior consolidación sólo puede justificarse en el desarrollo de nuevas aleaciones de titanio que no puedan obtenerse por colada, incluyendo en ello la reducción de las etapas de procesado, o en la producción de compuestos de matriz de titanio [7 y 8] .Las propiedades mecánicas de productos pulvimetalúrgicos de titanio dependen tanto de la composición de la aleación como de su densidad y microestructura final del compacto, que dependen a su vez de la naturaleza del polvo y el proceso de compactación, R Re ea ac ct ti iv vi id da ad d m ma at tr ri iz z--r re ef fu ue er rz zo o e en n c co om mp pu ue es st to os s d de e m ma at tr ri iz z d de e t ti it ta an ni io o p pu ul lv vi im me et ta al lú úr rg gi ic co o ( (· ·) ) V. Amigó * , F. Romero*, M.D. Salvador* y D. Busquets* R Re es su um me en n La elevada reactividad del titanio y la facilidad del mismo en formar intermetálicos dificulta la obtención de compuestos con este material y la necesidad, en todo caso, de recurrir al recubrimiento de las principales fibras utilizadas como refuerzo. Se propone obtener compuestos de titanio reforzados con partículas cerámicas y, por ello, resulta fundamental evaluar la reactividad entre los diferentes materiales. Se investiga como materiales de baja reactividad el nitruro y carburo de titanio y como materiales de mayor reactividad, ya constatada por la comunidad científica, el TiSi 2 . Esta reactividad se analizará mediante microscopía electrónica de barrido obteniéndose mapas de distribución de los elementos, que permiten establecer la posible influencia de la temperatura de sinterización y el tiempo de permanencia a éstas. De esta manera, se optimiza en lo posible las interacciones matriz-refuerzo para obtener unas propiedades mecánicas adecuadas. P Pa al la ab br ra as s c cl la av ve e Matrix-reinforcement reactivity in P/M titanium matrix composites A Ab bs st tr ra ac ct tThe high reactivity of titanium and the facility of the same one to form intermetallics makes difficult obtaining composites with this material and brings the need in any case of covering the principal fibres used as reinforcement. To obtain composites of titanium reinforced with ceramic particles is proposed in this paper, and for this reason it turns out to be f...

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Titanium Alloys for Aerospace Applications

Cited by 707 publications

References 9 publications

Enhanced fatigue properties of Ti-6Al-4V alloy turbine blades via formation of ultra-fine grained structure and ion implantation of surface

Enhanced fatigue properties of Ti-6Al-4V alloy turbine blades via formation of ultra-fine grained structure and ion implantation of surface

Microstructure and Mechanical Properties of Ti-6Al-4V Fabricated by Vertical Wire Feeding with Axisymmetric Multi-Laser Source

Matrix-reinforcement reactivity in P/M titanium matrix composites

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