Production of titanium specimens from a titanium hydride powder by hot pressing

Pankevich, A. P.; Chertovich, A. F.; Libenson, G. A.

doi:10.1007/bf00805598

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…These processes include both pressureassisted (i.e. hot pressing or HIP) as well as press and sinter methods, and have been used to produce a range of products including Ti alloys [173,[182][183][184][185][186][187][188], sputtering targets [189], decorative Ti products [190], and shape memory alloys [191].…”

Section: Sintering Of Tihmentioning

confidence: 99%

Powder metallurgy of titanium – past, present, and future

Fang

Paramore

Sun

et al. 2017

International Materials Reviews

411

158

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Powder metallurgy (PM) of titanium is a potentially cost-effective alternative to conventional wrought titanium. This article examines both traditional and emerging technologies, including the production of powder, and the sintering, microstructure, and mechanical properties of PM Ti. The production methods of powder are classified into two categories: (1) powder that is produced as the product of extractive metallurgy processes, and (2) powder that is made from Ti sponge, ingot, mill products, or scrap. A new hydrogen-assisted magnesium reduction (HAMR) process is also discussed. The mechanical properties of Ti-6Al-4V produced using various PM processes are analyzed based on their dependence on unique microstructural features, oxygen content, porosity, and grain size. In particular, the fatigue properties of PM Ti-6Al-4V are examined as functions of microstructure. A hydrogen-enabled approach for microstructural engineering that can be used to produce PM Ti with wroughtlike microstructure and properties is also presented.

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Section: Sintering Of Tihmentioning

confidence: 99%

Powder metallurgy of titanium – past, present, and future

Fang

Paramore

Sun

et al. 2017

International Materials Reviews

411

158

View full text Add to dashboard Cite

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“…Following these pioneering publications and patents, a wide variety of processes have been published and/or patented that use hydrogenated titanium powder. These processes include both pressure-assisted (i.e., hot pressing or HIP) as well as press and sinter methods, and have been used to produce a range of products, including titanium alloys [19,[25][26][27][28][29][30][31], sputtering targets [32], decorative titanium products [33], and shape-memory alloys [34]. Since 2000, a significant amount of work regarding vacuum sintering of hydrogenated titanium powder has been reported by Ivasishin et al [3,4,8,17,20,[35][36][37][38].…”

Section: History Of Using Hydrogenated Titanium In Pmmentioning

confidence: 99%

Hydrogen sintering of titanium and its alloys

Paramore

Fang

Sun

2015

Titanium Powder Metallurgy

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“…TiH 2 sponge is easily milled using ball milling to form TiH 2 powders with controlled granulometry and high defect density that has been shown to help densification. The direct sintering of TiH 2 has been shown to improve densification through the dehydrogenation process which takes place during sintering [4], [5], [17], [18]. The dehydrogenation of TiH 2 that occurs during sintering helps densification by leaving a freshly dehydrogenated surface [9], [19].…”

Section: Introductionmentioning

confidence: 99%

“…Sintering TiH 2 helps to lower the temperature at which the oxide layer is reduced. Dehydrogenation begins upon heating under a vacuum (10 −1 to 10 −2 mbar) at approximately 400 °C [21], and initiates the reduction of the oxide layer [18], which otherwise dissolves at approximately 600 °C [22]. The TiO 2 layer on the surface of the particles is reduced when it interacts with hydrogen liberated by the dehydrogenation of TiH 2 (Equation 2.2) [23]: Furthermore, diffusion is enhanced in ball milled powder because of the high defect density caused by the mechanical work of brittle TiH 2 [5], which also exists in HDH powder, albeit reduced by the dehydrogenation heat treatment it undergoes.…”

Section: Introductionmentioning

confidence: 99%

The effects of ball milling and the addition of blended elemental aluminium on the densification of TiH2 power

Schumann

Silvain

Bardet

et al. 2016

Materials Chemistry and Physics

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International audiencePowder production and sintering processes of titanium powder metallurgy are studied in order to reduce the cost of manufacturing titanium parts. The direct sintering of TiH2 simplifies powder processing and helps densification during sintering. The effects of ball milling have been shown to improve the dehydrogenation of TiH2, which during sintering, causes the earlier dissolution of the oxide layer surrounding the solid titanium particles, allowing solid diffusion to occur earlier. The combined effect of reduced particle size and increased dehydrogenation of ball milled TiH2 are studied here during sintering, in order to understand their roles during densification. TiH2 ball milled for various durations is vacuum hot press sintered at 700–900 °C. The density, microstructure and hardness of the fabricated titanium specimens are also studied. The effects of ball milled powder on the introduction of blended elemental aluminium are studied in comparison with a commercial titanium powder. The increase in ball milling duration of TiH2 powders to reduce particle size causes faster densification and dehydrogenation, with a finer uniform microstructure. When using fine ball milled powder with aluminium, the formation of Kirkendall pores through the interaction of titanium and liquid aluminium is worsened

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Production of titanium specimens from a titanium hydride powder by hot pressing

Cited by 4 publications

References 3 publications

Powder metallurgy of titanium – past, present, and future

Powder metallurgy of titanium – past, present, and future

Hydrogen sintering of titanium and its alloys

The effects of ball milling and the addition of blended elemental aluminium on the densification of TiH2 power

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