Improving sinterability of Ti–6Al–4V from blended elemental powders through equal channel angular pressing

Ng, Hoi-Pang; Haase, Christian; Lapovok, Rimma; Estrin, Yuri

doi:10.1016/j.msea.2012.12.071

Cited by 17 publications

(7 citation statements)

References 31 publications

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“…Recently, severe plastic deformation (SPD) methods have been used to overcome these limitations. One of the promising SPD processes which was used as a consolidation process is ECAP [16][17][18]. ECAP is a method for subjecting a volume of material to severe shear deformation by forcing it around a corner.…”

Section: Introductionmentioning

confidence: 99%

Development of a novel Al–Cu–Ti metallic glass reinforced Al matrix composite consolidated through equal channel angular pressing (ECAP)

Rezaei

Razavi

Shabestari

2016

Journal of Alloys and Compounds

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In this study, the equal channel angular pressing (ECAP) process was used to develop a novel Al matrix composite through consolidation of pure aluminum powder having different volume fractions of Al 65 Cu 20 Ti 15 metallic glass (AMG) as reinforcing particles. The structural evolution and mechanical properties of the composites were investigated. The densities of the samples were measured to evaluate the performance of the consolidation process. Structural analyses showed finely distributed reinforcing particles produced through shearing deformation, imposed during ECAP. Also, amorphous structure of reinforcement remained unchanged during ECAP at all volume fractions. The relative density of Al/10 vol% AMG composites was 97.94% which is the strong evidence for capability of ECAP to produce AMG reinforced Al matrix composites.The compressive yield strength of 184 MPa was obtained in Al/10 vol% AMG composite which showed a remarkable increase in the strength compared with pure Al. Also, the compressive yield strength of the developed composites has been compared with those estimated through the rule of mixtures.

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Section: Introductionmentioning

confidence: 99%

Development of a novel Al–Cu–Ti metallic glass reinforced Al matrix composite consolidated through equal channel angular pressing (ECAP)

Rezaei

Razavi

Shabestari

2016

Journal of Alloys and Compounds

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“…Therefore, it is highly valued by industries. The titanium alloy member having a tensile strength of 1,036 MPa and an elongation of 11.1% was obtained by Ng et al while studying the formation of Ti-6242 titanium alloy powder [7]. Also, titanium PM parts comparable in performance to the forged titanium can be directly obtained by conventional, inexpensive uniaxial cold pressing and sintering.…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution of TC4 powder by spark plasma sintering after hot deformation

Yan

Zhang

et al. 2020

High Temperature Materials and Processes

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The cylindrical samples of TC4 titanium alloy prepared by spark plasma sintering (SPS) were compressed with hot deformation of 70% on the thermosimulation machine of Gleeble-1500. The temperature of the processes ranged from 850°C to 1,050°C, and the strain rates varied between 0.001 and 5 s−1. The relative density of the sintered and compressed samples was measured by the Archimedes principle. During hot deformation, the microstructure of the sample was observed. The results show that the average relative density of the samples was 90.2% after SPS. And the relative density was about 98% after the hot deformation of 70%. Under high temperature (>950°C), the sensitivity of flow stress to temperature was reduced. At low strain rate (0.001 s−1), the increase in the deformation temperature promoted the growth of dynamic recrystallization (DRX). At the same temperature, the increase in strain rate slowed down the growth of DRX grains. And the variation tendency was shown from the basket-weave structure to the Widmanstätten structure at a low strain rate (<0.1 s−1), with increase in the strain rate.

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“…The casting is more commonly used in comparison with the forging due to the high potential process of the complex structural components and high utilization of raw materials [3,4]. The powder metallurgy (PM) techniques such as vacuum sintering, hot isostatic pressure (HIP), channel angular pressure, and spark plasma sintering (SPS) have been widely using to fabricate the dense and porous Ti6Al4V components [5][6][7][8][9][10][11][12]. Up to now, many studies have been done to find the best technique to fabricate Ti6Al4V.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Ti6Al4V Alloy Consolidated by Different Sintering Techniques

Phuong

Luong

Luan

et al. 2019

Metals

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In this paper, we investigated the effect of the different sintering techniques including vacuum sintering, capsule-free hot isostatic pressing (HIP), and capsule HIP on the microstructure and mechanical properties of Ti6Al4V alloy. The obtained results indicated that full density Ti6Al4V alloy could be obtained by using capsule HIP technique. The alloy sintered by capsule HIP had the highest hardness (~405 HV) and compressive yield strength (~1056 MPa). It is interesting that the geometry has a significant influence on the relative density and mechanical properties of the alloy sintered by the capsule-free HIP. The relative density, hardness, and compressive yield strength rise from center to periphery of the specimen. This is attributed to the heating and pressing in the capsule-free, which are external, leading to the densification processes starting from the outside to the inner parts of the pressed specimen. Using theoretical prediction with Gibson and Ashby power law found that the yield strength of the alloy sintered by capsule-HIP technique is much lower than that of the calculated value due to the formation of the coarse lamellar microstructure of -Ti grains.

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Improving sinterability of Ti–6Al–4V from blended elemental powders through equal channel angular pressing

Cited by 17 publications

References 31 publications

Development of a novel Al–Cu–Ti metallic glass reinforced Al matrix composite consolidated through equal channel angular pressing (ECAP)

Development of a novel Al–Cu–Ti metallic glass reinforced Al matrix composite consolidated through equal channel angular pressing (ECAP)

Microstructure evolution of TC4 powder by spark plasma sintering after hot deformation

Microstructure and Mechanical Properties of Ti6Al4V Alloy Consolidated by Different Sintering Techniques

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