Characterization of Ti–6Al–4V alloy foams synthesized by space holder technique

Esen, Ziya; Bor, Şakir

doi:10.1016/j.msea.2011.01.008

Cited by 120 publications

(81 citation statements)

References 31 publications

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“…After this stage the space holder will be removed and the metal sintered to allow further integration of the powder. A schematic of the method is shown in Several techniques (all taken from the powder metallurgy of conventional materials) have been used for the compaction of the Ti powder-space holder mixtures such as single and double ended cold axial pressing [41,43,52,58,60,62,63] , Uniaxial Hot pressing (HP) [55] and warm compaction [35,64,65] , producing titanium with a total porosity of up to 80 % [58,66] . As well as the typically limited range of part geometries that can be created, a drawback of applying these techniques is that the pressures involved are high, and this can cause the space holder particles to deform and break during compaction, altering the final shape of the pores.…”

Section: 31 Pressing With Space Holdermentioning

confidence: 99%

Open Celled Porous Titanium

Shbeh

Goodall

2017

Adv Eng Mater

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[**] One of the authours (MMS) would like to acknowledge a studentship from the Iraqi Ministry of Higher Education and Scientific Research.Among the porous metals, those made of titanium attract particular attention due to the interesting properties of this element. This review examines the state of research understanding and technological development of these materials, in terms of processing capability, resultant structure and properties and the most advanced applications under development. The impact of the rise of additive manufacturing techniques on these materials is discussed, along with the likely future directions required for these materials to find practical applications on a large scale.

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Section: 31 Pressing With Space Holdermentioning

confidence: 99%

Open Celled Porous Titanium

Shbeh

Goodall

2017

Adv Eng Mater

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“…Frary etl [24] fabricated a composite of tungsten reinforced in the Ti6Al4V matrix through powder metallurgy and proved that the improved mechanical properties of strength and hardness by losing minimum ductility. Several methods are available to compact metal powders such as uniaxial dies compaction [25,26], injection molding [27,28] and isostatic compaction [29,30] under either room or elevated temperatures. The main aim of this paper is to explain the conventional method of powder metallurgy technique and the influence of densification processes of Ti6Al4V/Y 2 O 3 metal matrix composite.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Densification Behaviour on Yttrium Oxide Reinforced Ti-6AL-4V Nano-Composite Through Powder Metallurgy

Ramaswamy¹,

Tjprc²

2018

IJMPERD

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Titanium based alloys are attracted in many applications due to its excellent properties. But it is not suitable for high temperature components due to poor performance at elevated temperatures. In this paper, a new attempt is done to improve its high temperature performance by adding yttrium oxide (Y 2 O 3 ) as reinforcement in a titanium alloy matrix.Yttrium oxide reinforced Ti-6Al-4V nano-composite was manufactured through powder metallurgy technique. Yttrium oxide was added in a range of 1-3% with matrix metal. The compaction pressure of 560 MPa was determined by using powder compression techniques. The composite preforms was made by cold compaction and green compacts were sintered through pressureless sintering process at a temperature range of 1200-1400 o C to improve the densification behaviour. Densities of preforms were measured by using analytical and Archimedes' principles to determine the densification behaviour of nano-composite. The scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to confirm the distribution of reinforcement with matrix metal. The nano-composite prepared by adding 2% of yttrium oxide provides higher densification behaviour compared to other additions of reinforcements.

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“…During heating to the sintering temperature, which is above the boiling point of Mg, magnesium first melts and creates macropores and then it evaporates. The Mg vapor present in the furnace creates a protective gas atmosphere and prevents oxidation of titanium since Mg has got higher oxygen affinity [30].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Mechanical Response of Porous Ti-6al-4v Alloys Produced by Different Compaction Techniques

Selimoğlu¹,

Aşık²,

Şen³

et al. 2017

ANADOLU UNIVERSITY JOURNAL OF SCIENCE AND TECHNOLOGY a - Applied Sciences and Engineering

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Porous Ti-6Al-4V alloys are attractive candidates as implant materials due to their good biocompatibility combined with the porous structure leading to increased osseointegration and decreased stiffness. Accordingly, different processing techniques were employed for the production of Ti-6Al-4V foams in the literature. Among these techniques, sintering with space holder is used to produce porous Ti-6Al-4V alloys in this study. Magnesium was employed as the space holder material because of its relatively low boiling point as well as high oxygen affinity. Two different compaction techniques, die compaction with hydraulic pressing and cold isostatic pressing (CIP), were employed for obtaining green compacts. Both spherical and nonspherical Ti-6Al-4V powders were used to investigate the effect of powder shape on compaction. Processed foams were characterized in terms of both microstructural and mechanical aspects in order to investigate the effect of pressing conditions in combination with powder characteristics. It was observed that NS-CIP foam, which was produced by compacting nonspherical powders by cold isostatic press, has the highest strength. However, the S-DP foam, which was produced by diepressing of spherical powders, has the highest toughness.

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Characterization of Ti–6Al–4V alloy foams synthesized by space holder technique

Cited by 120 publications

References 31 publications

Open Celled Porous Titanium

Open Celled Porous Titanium

Investigation of Densification Behaviour on Yttrium Oxide Reinforced Ti-6AL-4V Nano-Composite Through Powder Metallurgy

Comparison of the Mechanical Response of Porous Ti-6al-4v Alloys Produced by Different Compaction Techniques

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