Producing High-Quality Titanium Alloy by a Cost-Effective Route Combining Fast Heating and Hot Processing

Yang, Fei; Raynova, Stiliana Rousseva; Singh, Ajit Pal; Zhao, Qinyang; Romero, Carlos; Bolzoni, Leandro

doi:10.1007/s11837-018-2791-6

Cited by 14 publications

(3 citation statements)

References 17 publications

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“…In comparison to hot-pressed microstructure, the α grains are rather in form of needles, than lamellas. It was previously reported by Yang et al [16], that in the case of β titanium alloys such microstructure exhibits better mechanical properties and higher elongation, than structure composed of only β grains.…”

Section: Influence Of the Methods Of Consolidation On Density And Mic...mentioning

confidence: 84%

Archives of Metallurgy and Materials

Zyguła¹,

Wojtaszek²

2020

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The aim of the study was to indicate the influence of consolidation processes on microstructure and selected mechanical properties of powder metallurgy Ti-5Al-5Mo-5V-3Cr alloy, which was produced by blending of elemental powders method. Morphology of the mixture and its ingredients were examined using scanning electron microscopy. The consolidation of powders mixture was conducted using two approaches. The first consisted of the uniaxial hot pressing process, the second included two steps -uniaxial cold pressing process and sintering under argon protective atmosphere. Microstructural analysis was performed for both as-pressed compacts using light microscopy. Additionally, computed tomography studies were carried out, in order to examine the internal structure of compacts. Chosen mechanical properties, such as Vickers hardness and compression strength was also determined and compared. The conducted research proves that the proposed production method leads to obtain materials with no structural defects and relatively low porosity. Moreover, due to the proper selection of manufacturing parameters, favorable microstructures can be received, as well as mechanical properties, which are comparable to conventionally produced material with the corresponding chemical composition.

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Section: Influence Of the Methods Of Consolidation On Density And Mic...mentioning

confidence: 84%

Archives of Metallurgy and Materials

Zyguła¹,

Wojtaszek²

2020

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“…The green compact was heated up, rapidly, in an induction coil to the target temperature of 1250 °C to 1300 °C, in the protective argon atmosphere, followed by a hot-pressing under uniaxial pressure. Hereinafter, the billet was cooled down to room temperature in the flow argon protection, the detailed processes of this rapid consolidation approach have also been described elsewhere [18,19,24]. The consolidated PM Ti-5553 alloy billet had a diameter of 58 mm and a relative density of 98%.…”

Section: Methodsmentioning

confidence: 99%

Comparison of the Cracking Behavior of Powder Metallurgy and Ingot Metallurgy Ti-5Al-5Mo-5V-3Cr Alloys during Hot Deformation

et al. 2019

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The hot workability of metallic materials is significantly dependent on its ability to form plastic without cracking and fracturing. In this work, the cracking behavior of powder metallurgy (PM) Ti-5Al-5Mo-5V-3Cr (Ti-5553) alloy, consolidated from powder mixture, at a deformation temperature range of 600 °C–850 °C and strain rate of 0.1 s−1–10 s−1, was investigated through isothermal compression tests. The cracking behavior of the as-cast ingot metallurgy (IM) Ti-5553 alloy, at a deformation temperature of 700 °C was also investigated for comparison. Results suggested that the PM Ti-5553 alloy had a better hot workability, with a larger cracking-free processing window, and a lower deformation resistance than the IM counterpart. 45° shear fracture occurred in the PM alloy, compressed at the condition of 600 °C/10 s−1, and edge cracking was observed at the 700 °C/10 s−1. 45° shear fracture was also significant in the IM alloy specimen tested at 700 °C/10 s−1, and all the other IM alloy specimens compressed at 700 °C displayed longitudinal cracking. Moreover, the microscopic cracking observation showed that ductile dimple cracking can be found in the IM alloy, but brittle cleavage fracture was dominant in the cracking surface of PM alloy with a relatively low cracking ductility.

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“…Powder metallurgy (PM) titanium alloys parts can be produced through hot isostatic pressing, vacuum sintering and selective melting with qualified properties and refined microstructures 5,6 . In order to reduce the cost further and shorten the manufacturing period, fast consolidation approaches have been developed by the researchers like power forging and hot pressing 7,8 .…”

Section: Introductionmentioning

confidence: 99%

Effect of Processing Parameters on Hot Deformation Behaviour and Microstructural Evolution of PM Ti-5553 Alloy at a Moderate-high Strain Rate

et al. 2019

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Isothermal compression tests of Ti-5553 (Ti-5Al-5V-5Mo-3Cr) alloy, produced by a fast consolidation approach from blended elemental powder mixture, were performed on a Gleeble ® 3800 thermal-physical simulator to investigate its hot deformation behaviour. The samples were compressed in a wide temperature range from 700 °C to 1150 °C and a moderate-high strain rate of 1 s -1 , with the sample deformation degree of 30%, 50% and 70%, respectively. Flow instability occurred when the deformation temperature was less than 900 °C. Dynamic recovery (DRV) accompanied by dynamic recrystallization (DRX) become the dominated mechanisms at the medium temperature range between 900 °C and 1000 °C, while almost only DRV features could be observed at high temperature (1050 °C ~ 1150 °C). Moreover, α phase globalization could be identified in the alloy deformed in (α+β) region. DRV, DRX, α globalization and the transformation of α to β phase were promoted with the increasing deformation degree.

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Producing High-Quality Titanium Alloy by a Cost-Effective Route Combining Fast Heating and Hot Processing

Cited by 14 publications

References 17 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Comparison of the Cracking Behavior of Powder Metallurgy and Ingot Metallurgy Ti-5Al-5Mo-5V-3Cr Alloys during Hot Deformation

Effect of Processing Parameters on Hot Deformation Behaviour and Microstructural Evolution of PM Ti-5553 Alloy at a Moderate-high Strain Rate

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