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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 Understanding the Microstructure Evolution Pathway During the Post Heat Treatment in the Direct Energy Deposited Ti-5Al-5Mo-5V-3Cr Alloy
Author(s) Sydney Grace Fields, Dian Li, Yufeng Zheng
On-Site Speaker (Planned) Sydney Grace Fields
Abstract Scope Titanium alloys are critical structural materials with excellent comprehensive properties such as high specific strength, low density, and high corrosion resistance. These properties of titanium alloys can be tuned by the manipulation of microstructure evolution during a variety of heat treatment. In this work, we used advanced scanning electron microscopy, transition electron microscopy and MIPAR image analysis software to quantitatively study the microstructural evolution during the post-heat treatment for the direct energy deposited (DEDed) Ti-5Al-5V-5Mo-3Cr (wt.%, Ti-5553) alloy. The influence of heating rates, aging temperature, and cooling rates on the ⍺ microstructure during post heat treatment were systematically investigated. Refined, more-refined, and super-refined ⍺ microstructure with different number densities and microhardness were successfully generated. We will introduce the critical roles of post heat treatment on fine-tuning the ⍺ microstructure in the DEDed Ti-5553. This work is supported by the National Science Foundation, grant CMMI-2122272.


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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