The Technological Design of Geometrically Complex Ti-6Al-4V Parts by Metal Injection Molding
Source abstract
Abstract
In this study, the metal injection molding (MIM) process is applied to produce Ti-6Al-4V parts using blended and prealloyed powders, respectively. The feedstocks are prepared from a polyformaldehyde-based binder system with a powder loading of 60 vol%, exhibiting a low viscosity. The decomposition behavior of the binders is investigated and the thermal debinding procedure is designed accordingly. The debound parts are subsequently sintered at 1200 and 1300 °C. The results show the mechanical properties of the sintered samples prepared from blended powder are comparable to those prepared from prealloyed powder, with yield strength of 810 MPa, ultimate tensile strength (UTS) of 927 MPa, and elongation of 4.6%. The density of the as-sintered samples can reach 4.26 g/cm3 while oxygen content is ~0.3%. Based on the results, watch cases with complex shapes are successfully produced from Ti-6Al-4V blended powder. The case gives a good example of applying metal injection molding to mass production of precise Ti-6Al-4V parts with complex shapes in a cost-effective way.
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Research context
OpenAlex topics: Injection Molding Process and Properties · Advanced materials and composites · Advanced machining processes and optimization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Institute of Applied Physics and Materials Engineering, University of Macau, Macau, China
Department of Electromechanical Engineering, University of Macau, Macau, China
Funding
Shenzhen Science and Technology Innovation Commission · National Natural Science Foundation of China
References (28)
Show source-provided references
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