Microstructural evolution and mechanical properties of the Ti–6Al–4V alloy produced by vacuum hot-pressing

Bolzoni, Leandro; Montealegre-Meléndez, Isabel; Ruiz-Navas, E.M.; Gordo, E.

doi:10.1016/j.msea.2012.03.050

Cited by 50 publications

(21 citation statements)

References 14 publications

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“…9) Hot-pressing, the simplest of the hot consolidation techniques, consists of loading a loose powder into a graphite mold that is then placed between two punches and heated in an enclosed furnace. Moreover, the compaction and sintering take place simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Vacuum Hot-Press Sintering Temperatures on the Sintered Characteristics of Cr-31.2 mass% Ti Alloys

Chang

Huang³

2017

Mater. Trans.

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The aim of this work is to nd the optimal sintering parameters of Cr-31.2 mass% Ti alloys and simultaneously investigate the effects of the TiCr 2 Laves phases. In this study, Cr-31.2 mass% Ti alloys are fabricated by vacuum hot-press sintering. Different compositions of submicron titanium (760 nm) powders are added to micron chromium (4.66 μm) powders. The experiments utilize various hot-press sintering temperatures (1250, 1300, 1350 and 1400 C) with the pressure maintained at 20 MPa for 1 h, respectively. The experimental results show the optimal parameters of the hot-press sintered Cr-31.2 mass% Ti alloys to be 1400 C at 20 MPa for 1 h. The relative density reaches 99.96% and the hardness and TRS (transverse rupture strength) reach 81.93 HRA and 475.73 MPa, respectively. In addition, the increase in temperature of the hot-press sintering is effectively decreased the Cr 3 Ti 3 O and slightly enhanced TiCr 2 phases, which will lead to the better mechanical properties. Signi cantly, the optimal hot-press sintered Cr-31.2 mass% Ti alloys possess a dense microstructure, excellent mechanical property and good electrical conductivity value (1.51 × 10 4 S·cm

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Section: Introductionmentioning

confidence: 99%

Investigation of Vacuum Hot-Press Sintering Temperatures on the Sintered Characteristics of Cr-31.2 mass% Ti Alloys

Chang

Huang³

2017

Mater. Trans.

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“…Lately, titanium alloys and especially the Ti-6Al-4V alloy have been considered for their production by means of advanced powder metallurgy techniques [9][10][11][12][13][14][15].…”

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confidence: 99%

Flexural properties, thermal conductivity and electrical resistivity of prealloyed and master alloy addition powder metallurgy Ti–6Al–4V

Bolzoni

Ruiz-Navas

Gordo

2013

Materials & Design (1980-2015)

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A comparison between the properties achievable by processing the Ti-6Al-4V alloys by means of two powder metallurgy approaches, precisely prealloyed and master alloy addition, was carried out. Prealloyed and master alloy addition hydride-dehydirde powders characterised by an irregular morphology were shaped by means of cold uniaxial pressing and high vacuum sintered considering the effect of the variation of the sintering temperature and of the dwell time. Generally, the higher the temperature and the longer the dwell time, the higher the relative density and, consequently, the better the mechanical performances.Nevertheless, a higher processing temperature or a longer time leads also to some interstitials pick-up, especially oxygen, which affects the mechanical behaviour and, in particular, lowers the ductility. Although some residual porosity is left by the pressing and sintering route, mechanical properties, thermal conductivity and electrical resistivity values comparable to those of the wrought alloy are obtained.

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“…In order to strengthen the titanium alloy, different alloying elements like Sn, Zr (neutral stabilizer), Al, O, N, C (α stabilizer), Mo, V, Ta, Nb (β isomorphous stabilizer) and Fe, Mn, Cr, Co, Ni, Cu, Si, H, (β eutectoid stabilizer) are added [2,3]. The material having high strength-to-weight ratio, high stiffness, good corrosion resistance [4][5][6][7][8], good weldability, and high resistance to temperature is Ti6Al4V alloy [9][10][11][12][13][14][15][16][17][18][19], which was developed by adding 6 % aluminium (α stabilizer), 4 % vanadium (β stabilizer), and remaining titanium in the year 1954 [20,21]. Nowadays, titanium alloys (Ti6Al4V -two-phase α, β alloys) are greatly used in different industries: aircraft, spacecraft, marine, automotive, biomedical, chemical, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Sn addition on the microstructural characteristics and mechanical properties of the titanium alloy (Ti6Al4V)

Rajadurai¹,

Annamalai²

2018

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Ti-6Al-4V-xSn (x = 2, 4, and 6 wt.%) alloys were developed for the aerospace application through the near net shaped technique powder metallurgy route. Spark Plasma Sintering (SPS) was used to sinter the samples. The influence of Sn particles on the microstructural characteristics and mechanical properties of titanium alloy was examined through a novel technique called SPS. It has been found that Sn has a strong solid solution strengthening ability in the titanium alloy (Ti6Al4V). Moreover, the addition influences the microstructure and mechanical properties of titanium alloy. With increasing the percentage of Sn content, the density of the samples decreases, and the mechanical properties like yield stress (YS), ultimate tensile stress (UTS), the percentage of elongation and the hardness are greatly varying. From this investigation, it is found that YS, UTS, the percentage of elongation of the samples of Ti6Al4V-2Sn alloy exhibit better values than of Ti6Al4V-4Sn and Ti6Al4V-6Sn alloys, and the hardness of the samples is increasing with the addition of Sn from 2 to 6 %. K e y w o r d s : Ti-6Al-4V-xSn (x = 2, 4, and 6 wt.%), Spark Plasma Sintering (SPS), microstructure, mechanical properties

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Microstructural evolution and mechanical properties of the Ti–6Al–4V alloy produced by vacuum hot-pressing

Cited by 50 publications

References 14 publications

Investigation of Vacuum Hot-Press Sintering Temperatures on the Sintered Characteristics of Cr-31.2 mass% Ti Alloys

Investigation of Vacuum Hot-Press Sintering Temperatures on the Sintered Characteristics of Cr-31.2 mass% Ti Alloys

Flexural properties, thermal conductivity and electrical resistivity of prealloyed and master alloy addition powder metallurgy Ti–6Al–4V

Effect of Sn addition on the microstructural characteristics and mechanical properties of the titanium alloy (Ti6Al4V)

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