Microstructures and tensile mechanical properties of Ti–6Al–4V bar/disk fabricated by powder compact extrusion/forging

Liang, Chong; Ma, Minglin; Jia, M.T.; Raynova, Stiliana Rousseva; Yan, Jiawei; Zhang, Deliang

doi:10.1016/j.msea.2014.09.083

Cited by 31 publications

(7 citation statements)

References 23 publications

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“…Redistribution in the α-grains orientations was also observed in the subsurface layers of the Ti-6Al-4V powder compacts after extrusion/ forging [40], in cast and thermal treated Ti-6Al-4V plates after fast multiple rotation rolling (FMRR) [32] or friction stir processing (FSP) [41]. The multiple impacts at forging, the sliding load at FMRR or sever mechanical mixing at FSP like the UIT process used in this study originated randomly oriented α-grains in Ti-6Al-4V specimens.…”

Section: Xrd Analysis and Tem Observationsmentioning

confidence: 77%

“…The multiple impacts at forging, the sliding load at FMRR or sever mechanical mixing at FSP like the UIT process used in this study originated randomly oriented α-grains in Ti-6Al-4V specimens. On the contrary, extrusion resulted in strong axial texture of PM Ti-6Al-4V compacts [40]. The crystallographic texture was concluded to influence the slope of the fatigue curves, i.e.…”

Section: Xrd Analysis and Tem Observationsmentioning

confidence: 97%

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Enhanced fatigue behavior of powder metallurgy Ti–6Al–4V alloy by applying ultrasonic impact treatment

Dekhtyar

Mordyuk

Savvakin

et al. 2015

Materials Science and Engineering: A

130

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Section: Xrd Analysis and Tem Observationsmentioning

confidence: 77%

Section: Xrd Analysis and Tem Observationsmentioning

confidence: 97%

Enhanced fatigue behavior of powder metallurgy Ti–6Al–4V alloy by applying ultrasonic impact treatment

Dekhtyar

Mordyuk

Savvakin

et al. 2015

Materials Science and Engineering: A

130

View full text Add to dashboard Cite

“…Large contents (even less than 1 at.per cent) of interstitial elements are, however, detrimental to the ductility of a Ti alloy (Conrad, 1981). The contents of interstitial elements can be managed in the microstructure through plastic deformation along with heat treatment processes such as powder compact forging (Jia et al , 2015; Liang et al , 2014), laser solid forming (Zhao et al , 2018), solution-treatment, quenching and aging (Shekhar et al , 2015), hydrogenation-dehydrogenation treatment (Liu et al , 2018a), equal channel angular pressing, hydrogen sintering and phase transformation (Paramore et al , 2015) etc.…”

Section: Development Of High Strength Near-α Titanium Alloysmentioning

confidence: 99%

Mechanical properties of near alpha titanium alloys for high-temperature applications - a review

Tabie

Wang

et al. 2020

AEAT

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Purpose This paper aims to present a broad review of near-a titanium alloys for high-temperature applications. Design/methodology/approach Following a brief introduction of titanium (Ti) alloys, this paper considers the near-α group of Ti alloys, which are the most popular high-temperature Ti alloys developed for a high-temperature application, particularly in compressor disc and blades in aero-engines. The paper is relied on literature within the past decade to discuss phase stability and microstructural effect of alloying elements, plastic deformation and reinforcements used in the development of these alloys. Findings The near-a Ti alloys show high potential for high-temperature applications, and many researchers have explored the incorporation of TiC, TiB SiC, Y2O3, La2O3 and Al2O3 reinforcements for improved mechanical properties. Rolling, extrusion, forging and some severe plastic deformation (SPD) techniques, as well as heat treatment methods, have also been explored extensively. There is, however, a paucity of information on SiC, Y2O3 and carbon nanotube reinforcements and their combinations for improved mechanical properties. Information on some SPD techniques such as cyclic extrusion compression, multiaxial compression/forging and repeated corrugation and straightening for this class of alloys is also limited. Originality/value This paper provides a topical, technical insight into developments in near-a Ti alloys using literature from within the past decade. It also outlines the future developments of this class of Ti alloys.

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“…In addition, some materials and complex parts, which cannot be prepared with the traditional casting method and mechanical processing method can also be manufactured with the powdermetallurgy technology. 4,5 C. Liang et al 6 used hydrogenation/dehydrogenation powder sintering combined with the forging method to prepare a Ti-6Al-4V alloy with a lamellar structure and close to 100 % density. After the forging, the tensile strength of the Ti-6Al-4V alloy can reach 1350 MPa, the yield strength is 1200 MPa, the elongation reaches 10 % and the size of internal particles is less than 3 μm.…”

Section: Introductionmentioning

confidence: 99%

Constitutive equations and processing map for hot deformation of a Ti-6Al-4V alloy prepared with spark-plasma sintering

Wu¹,

Liu²,

Xu³

et al. 2020

Mater. Tehnol.

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High-temperature flow behaviors of a spark-plasma-sintered Ti-6Al-4V alloy was studied at a temperature range of 850-1050°C and a strain rate of 0.001-5 s-1 on a Gleeble-1500D simulator. The true stress-strain curve of the alloy deformed at the total strain of about 70 % was studied. The results show that the flow stress increased as the deformation temperature decreased and the strain rate increased. Based on an Arrhenius-type equation, a constitutive equation was established. In the constitutive equation, the strain has a significant influence on the material parameters, and the relationships between the material parameters and strain are incorporated with a fine polynomial fitting. So, the flow stress is regarded as the function of the deformation parameters such as strain, strain rate and deformation temperature. The average activation energy for the hot deformation of the spark-plasma-sintered Ti-6Al-4V alloy was 425.581 kJ/mol. Meanwhile, hot-processing maps were established based on dynamic material modeling to obtain the regular pattern of the influence of the processing parameters on deformation. The results show that the effects of deformation temperature, strain rate and strain on the peak-dissipation efficiency factor and the instability range are extremely significant. With an increase in the strain, the peak-dissipation efficiency factor increases and the flow-instability range gradually decreases. The optimum deformation temperature and strain rate for hot working of the spark-plasma-sintered Ti-6Al-4V alloy are 950-1000°C and 1-5 s-1 , respectively.

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Microstructures and tensile mechanical properties of Ti–6Al–4V bar/disk fabricated by powder compact extrusion/forging

Cited by 31 publications

References 23 publications

Enhanced fatigue behavior of powder metallurgy Ti–6Al–4V alloy by applying ultrasonic impact treatment

Enhanced fatigue behavior of powder metallurgy Ti–6Al–4V alloy by applying ultrasonic impact treatment

Mechanical properties of near alpha titanium alloys for high-temperature applications - a review

Constitutive equations and processing map for hot deformation of a Ti-6Al-4V alloy prepared with spark-plasma sintering

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