ORALS

SESSION: ManufacturingWedPM2-R10	3rd Intl. Symp.on Advanced Manufacturing for Sustainable Development
Wed. 30 Nov. 2022 / Room: Saitong
Session Chairs: I.G. Kim; Jan Dzugan; Session Monitor: TBA

15:55: [ManufacturingWedPM209] OS
Special Titanium Alloys Deposition by Directed Energy Deposition System
Jan Dzugan¹ ; Libor Kraus¹ ; ¹COMTES FHT Inc., Dobrany, Czech Republic;
Paper Id: 268 [Abstract]

As the additive manufacturing (AM) processes are developing and expanding their capabilities and subsequently also application fields, new alloys are being implemented in order to fulfil specific requirements for highly demanding applications. In the current paper, beta-titanium alloy Ti-13Zr13Nb is investigated. This materials is special due to low elastic modulus and its certification for bio applications. The experimental material is deposited by powder blown directed energy deposition process. Microstructure and local mechanical properties at room temperature under quasi-static loading conditions are investigated here. Optical and electron microscopy investigations including EBSD analyses are carried out here in order to provide detailed information on the microstructure of the AM deposited material. Mechanical properties in terms of tensile properties are investigated using miniaturized tensile test specimens excised in various orientations regarding the deposition process. Microstructure and mechanical properties homogeneity together with imperfections observations are investigated for the material of interest. Obtained results are compared with properties of the other Ti-alloys produced in conventional way and by AM processes.

SESSION: ManufacturingWedPM2-R10	3rd Intl. Symp.on Advanced Manufacturing for Sustainable Development
Wed. 30 Nov. 2022 / Room: Saitong
Session Chairs: I.G. Kim; Jan Dzugan; Session Monitor: TBA

16:20: [ManufacturingWedPM210] OS
AM Deposited Beta Titanium Alloys For Biomedical Applications
Jan Dzugan¹ ; Sylwia Rzepa² ; Matej Daniel³ ; Wei-chin Huang⁴ ; Michal Sibr⁵ ; Libor Kraus¹ ; ¹COMTES FHT Inc., Dobrany, Czech Republic; ²COMTES FHT, Dobrany, Czech Republic; ³CTU Prague, Prague, Czech Republic; ⁴ITRI, Hsinchu, Taiwan; ⁵Prospon, Kladno, Czech Republic;
Paper Id: 420 [Abstract]

AM deposition of components for the biomedical applications increases gradually its applications. There has been done a lot of work on AM deposition of Ti alloys such as commercially pure alloys Ti Gr.2, Ti Gr.4 and mainly Ti-6Al-4V alloy. However, there are some drawbacks such a slow strength values for both Ti Gr. 2 and 4 and relatively high elastic modulus for all mentioned Ti alloys (1-3). Moreover, Ti-6Al-4V exhibits potentially negative aspect related to alloying elements dissolution in the body and absorption by human organs. Therefore, other alloys are being There are currently certified two beta-titanium alloys for the biomedical applications: Ti-13Nb-13Zr (ASTM F1713) and Ti-12Mo-6Zr-2Fe (ASTM F1813), that are investigated in this work. These materials are in the presented study deposited by Laser Powder Bed Fusions process (LPBF) and by Directed energy Deposition system (DED). Microstructures investigations are accompanied by mechanical properties assessment in terms of quasi-static and cyclic test, that are presented here together with dynamic elastic modulus measurements. The elastic modulus values achieved here are significantly closer to behavior of human bone, than standardly used Ti 6Al-4V. Assessment of behavior for both consider alloys deposited by two AM deposition processes is performed based on the results achieved here and compared with previously obtained results for Ti 6Al-4V.

References:
1. Dzugan, J et. Al.: Effects of thickness and orientation on the small scale fracture behaviour of additively manufactured Ti-6Al-4V, 2018, MATERIALS CHARACTERIZATION 143 , pp.94-109
2. Pehlivan, E et. al: Effects of build orientation and sample geometry on the mechanical response of miniature CP-Ti Grade 2 strut samples manufactured by laser powder bed fusion, 2020, ADDITIVE MANUFACTURING 35
3. Stráský, J et.al.: Achieving high strength and low elastic modulus in interstitial biomedical Ti–Nb–Zr–O alloys through compositional optimization, 2022, Materials Science and Engineering A, 839, 142833.