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Meeting Materials Science & Technology 2019
Symposium Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
Presentation Title P2-69: Modeling the Critical Dynamic Recrystallization of a PM Ti-22Al-25Nb Alloy during Hot Compression Deformation
Author(s) Yu Sun, Lianxi Hu, Yuan Yuan
On-Site Speaker (Planned) Yu Sun
Abstract Scope The deformation behavior of a powder metallurgy Ti-22Al-25Nb alloy was studied by the hot compression tests at the temperature range of 995-1075 ℃ and strain rate range of 0.001-1 s-1. Applying conventional Arrhenius equations, the activation energies for dynamic recrystallization were calculated to be 410.172 KJ/mol. The critical DRX model was constructed by the critical conditions dynamics theory Poliak and Jonas proposed with Zener-Hollomon parameter. Results showed that the ratio of the critical strain and the strain of peak stress was constant at 0.67 under different deformation conditions. In addition, εp was expressed via exponential form of Z. According to the effects of deformation temperatures and strain rates on the Z parameter, it was revealed that the values of εc and σc decreased with temperatures increasing and strain rates reducing, further indicating that lower Z parameter could promote the occurrence of DRX behavior for the studied alloy.
Proceedings Inclusion? Definite: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Advances in Titanium Research & Technology in Australia
Analysis of Grain Boundary α Phase in Hydrogen Sintered Powder Metallurgy Ti-6Al-4V
Deformation behavior and Microstructural Evolution of Hydrogen-Sintered Ti-6Al-4V during hot compression tests
Design and Fabrication of Strong and Ductile (tensile) Powder Metallurgy Titanium Metal Matrix Composites
Development of Magnesium and Magnesium Alloy Materials through Press and Sinter Powder Processing
Development of Water-soluble Binders for Titanium Metal Injection Moulding (Ti-MIM) to Produce High Performance Components
Fabrication of La2O3 Dispersed Mo-Si-B Alloys and Its Mechanical Properties
Gas Atomization Processing of Calcium Powder with In situ Passivation
Improved Exothermic Reactivity of Surface-mediated Fine Aluminum Powders
Low Temperature Sintering of Ti6Al4V as a Promising Route to Design Titanium based Composites
Mechanical Properties of HIP'd HSPT sintered Ti-6Al-4V
Metal Injection Molding of Titanium Alloys and its Applications in the Industry
P2-68: Creep Compaction of Nanocrystalline Copper Powder
P2-69: Modeling the Critical Dynamic Recrystallization of a PM Ti-22Al-25Nb Alloy during Hot Compression Deformation
Phase Diagram and Mechanical Properties of a CoCrFeNi1-xTix High Entropy Alloy Fabricated by Mechanical Alloying
Powder Hot Isostatic Pressing of Pure Nb: Influence of Powder Characteristics on the Mechanical Properties
Powder Processing Mo-Si-B for High Strength and Low Temperature Toughness
Powder sintering involving TiH2: An Update Overview
Preparation of Mo2C by Reduction and Carbonization of MoO2 with Ethanol
Soft Magnetic Properties of Amorphous Metal Powders Fabricated by Gas-atomization Process
Strong and Ductile Novel Aluminium Metal Matrix Composites Reinforced with Ex-situ Carbon Nanotubes and In-situ Alumina Nanoparticles
The Influence of Atomisation route and Powder Characteristics on the Microstructural and Mechanical Properties Development of HIPped IN625 Ni-Superalloy
The Research on Improve the Mechanical Property by Selective Formation of Y-Ti-O Complex Oxide in Ni-based ODS Alloy
Thermodynamic Model for Predicting the Embodied Energy of Titanium Alloys Produced by Powder Metallurgy
Ultrasonic Consolidation of Nanocrystalline Powders

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