Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals: On-Demand Oral Presentations
Sponsored by: TMS Materials Processing and Manufacturing Division, TMS: Powder Materials Committee
Program Organizers: Ma Qian, Royal Melbourne Institute of Technology; James Paramore, Texas A&M University; David Yan, San Jose State University; Gang Chen, University of Science and Technology Beijing
Monday 8:00 AM
March 14, 2022
Room: Materials Processing
Location: On-Demand Room
Cost Down and Plain Design of High-performance Titanium via Additive Manufacturing: Gang Chen1; Wangwang Ding1; Qiying Tao1; Mingli Qin1; Xuanhui Qu1; 1University of Science and Technology Beijing
Currently, additive manufacturing of high-performance Ti alloys suffers the high-cost powder feedstock and heavy dependence on rare-metal alloying. This works demonstrates an innovative and facile pathway towards low-cost HDH Ti powder feedstock for AM by gas-solid fluidization, which lowers its cost over 50 % as compared with the atomized powders. Besides, compositional tailoring during fluidization can be achieved via simultaneous reaction with ubiquitous interstitial elements for HDH CP-Ti powders. The as-fabricated CP-Ti by SLM using fluidized powders exhibited superior tensile properties (UTS=1155±6 MPa, YS=1083±29 MPa, EL=13±1.6 %) at room temperature, surprisingly comparable with Ti-6Al-4V. This can be attributed to the strengthening-and-toughening effect on CP-Ti induced by interstitial solid solution and nanoscale-interface microstructure. Contrary to the conventional metallurgical mechanism for Ti, this work presents SLMed CP-Ti with excellent synergy of strength and ductility while using HDH Ti powders, which surmounts the cost-performance dilemma and realizes plain design for high-performance Ti materials.