Sintering Behavior and Microstructure Formation of Titanium Aluminide Alloys Processed by Metal Injection Molding

Soyama, Juliano; Oehring, Michael; Ebel, Thomas; Kainer, Karl Ulrich; Pyczak, Florian

doi:10.1007/s11837-016-2252-z

Cited by 16 publications

(3 citation statements)

References 24 publications

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“…followed by HIP process [112] Further studies improved the properties of MIM fabricated TiAl components by improving the process parameters, binder systems and composition of materials [62,64,113]. Table 2 summarizes some results obtained from MIM of TiAl components.…”

Section: Figure 8 Optical Microstructure Of -Tial Produced By (A) Mmentioning

confidence: 99%

Metal injection moulding of titanium and titanium alloys: Challenges and recent development

et al. 2017

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Section: Figure 8 Optical Microstructure Of -Tial Produced By (A) Mmentioning

confidence: 99%

Metal injection moulding of titanium and titanium alloys: Challenges and recent development

et al. 2017

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“…Powder metallurgy (PM) is a manufacturing technique that offers reduced costs with near-net shape capability, as well as good microstructural homogeneity leading to fine and segregation-free microstructures [9,10]. Moreover, the use of PM techniques decreases the waste of raw materials, since nearly 100% of powders are employed to build the final part [11].…”

Section: Introductionmentioning

confidence: 99%

Sinterability and microstructure evolution of powder metallurgy processed titanium aluminides

Silva

Quaglio

Monfardini

et al. 2023

Materials Science and Technology

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The objective of this study was to assess the effect of different aluminium additions in microstructure evolution and hardness of powder metallurgy processed titanium aluminides. Alloys with aluminium contents of 10, 20, 30, 40 and 45 at.-% were prepared using mixtures of elemental powders that were cold uniaxially pressed. Sintering was conducted at 1300 and 1400°C for 2 h under argon atmosphere. The results indicated a sharp decrease in sinterability for larger elemental aluminium additions. Furthermore, the hardness values decreased with the aluminium content due to the higher porosity. However, in alloys with higher aluminium content, despite the higher porosity, microstructural homogeneity was improved and equilibrium phases α2-Ti3Al and γ-TiAl could be achieved in fully lamellar Ti-40Al and Ti-45Al.

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“…In addition, MIM is able to form near-net shaped parts with homogeneous and refined microstructures. In the past few years, the fabrication of Ti alloy parts though MIM technology has been very successful, while only a few works on MIM TiAl alloys have been reported [8][9][10][11][12]. Gerling et al [10] investigated the MIM process of Ti-47Al-4(Nb, Mn, Cr, Si, B) (at %) alloy, and found that the impurity content of the sintered sample under an argon atmosphere was increased compared to that of vacuum-sintered parts.…”

Section: Introductionmentioning

confidence: 99%

Metal Injection Moulding of High Nb-Containing TiAl Alloy and Its Oxidation Behaviour at 900 °C

Liu

Yang

et al. 2018

Metals

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High Nb-containing TiAl alloy with a nominal composition of Ti-45Al-8.5Nb-0.2W-0.2B-0.02Y (at %) was fabricated by metal injection moulding (MIM) technology with an improved wax-based binder. The critical powder loading and feedstock rheological behaviour were determined. The influence of sintering temperature on microstructures and mechanical properties of the sintered samples and their oxidation behaviour were also investigated. Results showed that a feedstock, with a powder loading of 68 vol % and good flowability, could be obtained by using the improved binder, and oxygen pickup was lower than that of the sample prepared by using a traditional binder. The ultimate tensile strength (UTS) and plastic elongation of the sample sintered at 1480 • C for 2 h were 412 MPa and 0.33%, at room temperature, respectively. The 1480 • C-sintered sample consisted of γ/α 2 lamellar microstructure with the average colony size of about 70 µm, and its porosity was about 4%. The sintered alloy showed better oxidation resistance than that of the cast alloy counterpart.

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Sintering Behavior and Microstructure Formation of Titanium Aluminide Alloys Processed by Metal Injection Molding

Cited by 16 publications

References 24 publications

Metal injection moulding of titanium and titanium alloys: Challenges and recent development

Metal injection moulding of titanium and titanium alloys: Challenges and recent development

Sinterability and microstructure evolution of powder metallurgy processed titanium aluminides

Metal Injection Moulding of High Nb-Containing TiAl Alloy and Its Oxidation Behaviour at 900 °C

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