Effect of the Processing Conditions on Density, Strength and Microstructure of Ti-12Mo Alloy Fabricated by PIM Process.

Takekawa, Junnjiro; Sakurai, Noriaki

doi:10.2497/jjspm.46.877

Cited by 16 publications

(9 citation statements)

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“…Curiously, too high a sintering temperature does damage, with loss of sintered strength due to either gas reactions or microstructure coarsening. This is evident in Figure 4 for Ti-12Mo sintered for 5 h at various temperatures [64]. Subsequently, the component is densified using hot isostatic pressing.…”

Section: Ti-mim Processing Optimizationmentioning

confidence: 92%

“…Titanium component production by the metal powder injection molding process (Ti-MIM) was the subject of much effort over the past few decades with several reports showing the incremental steps in powders, binders, debinding, sintering, and post-sintering details [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,…”

Section: Introductionmentioning

confidence: 99%

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Progress in Titanium Metal Powder Injection Molding

German

2013

Materials

151

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Metal powder injection molding is a shaping technology that has achieved solid scientific underpinnings. It is from this science base that recent progress has occurred in titanium powder injection molding. Much of the progress awaited development of the required particles with specific characteristics of particle size, particle shape, and purity. The production of titanium components by injection molding is stabilized by a good understanding of how each process variable impacts density and impurity level. As summarized here, recent research has isolated the four critical success factors in titanium metal powder injection molding (Ti-MIM) that must be simultaneously satisfied—density, purity, alloying, and microstructure. The critical role of density and impurities, and the inability to remove impurities with sintering, compels attention to starting Ti-MIM with high quality alloy powders. This article addresses the four critical success factors to rationalize Ti-MIM processing conditions to the requirements for demanding applications in aerospace and medical fields. Based on extensive research, a baseline process is identified and reported here with attention to linking mechanical properties to the four critical success factors.

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Section: Ti-mim Processing Optimizationmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Progress in Titanium Metal Powder Injection Molding

German

2013

Materials

151

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“…Ho et al (1999) first fabricated Ti-12.5Mo by arc-melting and casting, and characterized the hardness only. Takekawa et al (1999) then fabricated Ti-12Mo by both MIM and press-and-sinter powder metallurgy.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties, in vitro corrosion resistance and biocompatibility of metal injection molded Ti-12Mo alloy for dental applications

Wang

et al. 2018

Journal of the Mechanical Behavior of Biomedical Materials

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A biocompatible Ti-12Mo alloy was fabricated by metal injection moulding (MIM) using non-spherical titanium, molybdenum powders and a purposely designed binder. The density, microstructure and tensile properties were characterized. This was followed by a detailed assessment of its in vitro corrosion and biocompatibility performances, compared with that of two commonly used titanium-based materials extra low interstitial (ELI) Ti-6Al-4V and commercially pure (CP) titanium. The MIM-fabricated Ti-12Mo alloy can achieve a wide range of mechanical properties through controlling sintering process. Specimens sintered at 1400 °C are characterized by fairly uniform near-β microstructure and high relative density of 97.6%, leading to the highest tensile strength of 845.3 ± 21 MPa and elongation of 4.15 ± 0.2% while the highest elastic modulus of 73.2 ± 5.1 GPa. Owing to the formation of protective TiO-MoO passive film, the MIM-fabricated Ti-12Mo alloy exhibits the highest corrosion resistance including the noblest corrosion potential, the lowest corrosion current density and the highest pitting potential in four different electrolytes. The in vitro cytotoxicity test suggests that the MIM-fabricated Ti-12Mo alloy displays no adverse effect on MC3T3-E1 cells with cytotoxicity ranking of 0 grade, which is nearly close to ELI Ti-6Al-4V or CP Ti. These properties together with its easy net-shape manufacturability make Ti-12Mo an attractive new dental implant alloy.

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“…However, research has increasingly been reported on MIM of β-Ti alloys for potential medical applications [275,[281][282][283][284]. MIM has also been investigated for producing Ti aluminides for hightemperature application, [285][286][287][288][289][290].…”

Section: Mim Of Timentioning

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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Effect of the Processing Conditions on Density, Strength and Microstructure of Ti-12Mo Alloy Fabricated by PIM Process.

Cited by 16 publications

References 1 publication

Progress in Titanium Metal Powder Injection Molding

Progress in Titanium Metal Powder Injection Molding

Mechanical properties, in vitro corrosion resistance and biocompatibility of metal injection molded Ti-12Mo alloy for dental applications

Powder metallurgy of titanium – past, present, and future

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