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Meeting MS&T23: Materials Science & Technology
Symposium Phase Transformations and Microstructure Evolution during Post-Processing of Additively Manufactured Metals
Presentation Title Influence of Post Processing Annealing on Precipitation and Deformation Behavior of Additvely Processed Beta Titanium Alloys
Author(s) Srinivas Aditya Mantri, Mohan Sai Kiran Kumar Yadav Nartu, Sriswaroop Dasari, Abhishek Sharma, Riyadh Salloom, Fan Sun, Srinivasan Srivilliputhur, Narendra Dahotre, Frederic Prima, Rajarshi Banerjee
On-Site Speaker (Planned) Rajarshi Banerjee
Abstract Scope Laser powder bed fusion (LBPF) was employed to fabricate a strain-transformable beta Ti alloy, Ti-10V-2Fe-3Al. While the alloy is known to exhibit transformation-induced plasticity (TRIP), under tensile loading the as-fabricated alloy did not exhibit the TRIP effect, due to the formation of isothermal omega precipitates, resulting from the repeated heating-cooling cycles experienced during the LBPF process leads to the early stages of rejection of solute elements (Fe, V, and Al). Interestingly, after annealing the LPBF processed alloy above the beta solvus temperature and quenching, athermal omega forms, and the TRIP/TWIP effects were reactivated, resulting in substantial recovery of tensile ductility and an exceptionally high strain hardening rate. When annealed below the beta solvus temperature, the LPBF processed Ti-10-2-3 exhibited a large fraction of intra-granular alpha precipitates, even for short annealing times, leading to an increase in yield strength, while maintaining substantial strain hardenability. The underlying mechanisms will be discussed.


Additive Manufacturing of 718 Ni ODS Alloys and Haynes 230 Alloys with Nanoprecipitates
Impact of Heat Treatment Rates on Phase Transformation in Additively Manufactured Gamma Prime Superalloys IN738LC
Influence of Post-process Forging on Microstructure and Properties of LPBF AlSi10Mg
Influence of Post Processing Annealing on Precipitation and Deformation Behavior of Additvely Processed Beta Titanium Alloys
Laser Reheating and Polishing of Powder-blown Directed Energy Deposition
Microstructural Evolution of One and Two Step Heat Treatments on Electron Beam Powder Bed Fusion Fabricated Haynes 282
Microstructure and Mechanical Characterization of As-deposited and Forged Wire Arc Additively Manufactured (WAAM) 316LSi
Microstructure Engineering of Specialty Alloys via Post Advanced Manufacturing Thermal Treatments
Observation of Structure Coarsening During Annealing of Additively Manufactured Ti-6Al-4V
Tuning the Precipitate Microstructure in the Selective Laser Melted Ti-6Al-2Sn-4Zr-2Mo Alloy via Post Heat Treatment
Understanding the Microstructure Evolution Pathway During the Post Heat Treatment in the Direct Energy Deposited Ti-5Al-5Mo-5V-3Cr Alloy
Use of In Situ TEM Heating to Study Transformation Pathways for Metastable Phases in New Candidate Alloys for Additive Manufacturing

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