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Meeting MS&T21: Materials Science & Technology
Symposium Advanced Materials for Harsh Environments
Presentation Title Enhancing the Hardness and Corrosion Resistance of Ni-based Alloys with Thermomechanical Processing
Author(s) Haruka Shima, Manami Mori, Kenta Yamanaka, Kazuo Yoshida, Akihiko Chiba
On-Site Speaker (Planned) Haruka Shima
Abstract Scope In this study, we examined the effect of heat treatment on the microstructure, mechanical properties, and corrosion behavior of cold-swaged Ni-30Co-16Cr-15Mo-6Fe-2Cu (mass%) alloy. An alloy rod was processed by cold swaging, with reduction in area of 50-90 %, and then annealed at 473-1273 K for various periods. The hardness of the alloy increased by cold swaging significantly. Notably, aging at 473-873 K further enhanced the Vickers hardness of the cold-swaged specimens through the nanostructural elemental evolution in the heavily deformed FCC matrix. The Cu precipitation was also observed. Although the precipitation of the Mo-rich μ-phase occurred at higher annealing temperature, the alloy was softened due to the recrystallization. Potentiodynamic polarization testing in a sulfuric acid solution revealed that such nanoscale structural evolution does not degrade the corrosion resistance of the alloy. Consequently, an excellent combination of high hardness and corrosion resistance, which exceeds that of existing corrosion-resistant superalloys, was achieved.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Assessment of Conductive Sites on Carbon Fiber Reinforced Polymer Composite Using Different Electrochemical Experimental Methods
Corrosion Behaviors of Alloys in High Temperature Supercritical CO2 with Impurity
Corrosion Behaviors of Carbon Steels and Cr-bearing Steels in Supercritical CO2
Determining the Effect of Aerospace Environments on the Corrosion Fatigue Performance of AA7085-T7451
Development of High Performance H2 Permeation Barrier Coating with Good Thermal Cycling Resistance
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Electrical, Microstructural and Thermomechanical Properties of Doped-LaCrO3 Ceramics for High Temperature Electronics and Sensing Applications
Enhancing the Hardness and Corrosion Resistance of Ni-based Alloys with Thermomechanical Processing
Evaluation of High Temperature Planar Passive Wireless Sensor Fabricated by Stereolithography Process
Features of the Formation of the Structure and Properties of Corrosion-resistant Steel during Heat Treatment
Finite Element Corrosion Model and Experimental Characterization of Austenitic Stainless-Steel Engine Valves Oxidized in CO2 at 700 °C
High-temperature Stability and Phase Transformations of Titanium Carbide (Ti3C2Tx) MXene
High Temperature Mixed Deposit and Oxidation Degradation of a Coated and Uncoated Ni-based Superalloys
Influence of Alkaline Earth Metals on Structure Formation, Mechanical and Special Properties of Aircraft Casting from Magnesium Alloys
Influence of the Gas Composition on the Metal Dusting Attack of Oxide Forming Alloys
Investigation of Automotive Materials Compatibility for Regenerative Fuels – Oxymethylene Dimethyl Ether (OME)
Investigation of the Variables Affecting Hot Corrosion Test Results
Microstructural Stability at Elevated Temperature of the Ni-based Electron Beam Welded Superalloys Dissimilar Joint
Microstructure and Mechanical Properties of Friction Stir Welded Haynes 282
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Now On-Demand Only - Characterization and High Temperature Electrical Properties of Brazed Joints of La0.8Sr0.2CrO3 with Nickel and Nickel Alloys
Now On-Demand Only - Passive Wireless Sensors for Real Time Temperature and Corrosion Monitoring of Coal Boiler Components Under Flexible Operation
Oxidation Behavior of IN100 Superalloy between 840 - 1120 K
P2-16: Development of Porous Silicon Nitride for Hypersonic RF Window Applications
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Robust Heat Resistant Superhydrophobic Coatings Fabricated by Functionalized Nanoparticles
Scandium-containing Filler Material for Welding Aircraft Castings Made of High-temperature Magnesium-based Alloy
Structural Response of Si (111) and Diamond/Si (111) to 193 nm and 5 ns Laser Pulses
The Importance of Quality Control, Characterization and Testing in Manufacturing and Production
Towards a Fundamental Understanding of Surface Interactions and Degradation Mechanism in Bio-feedstock-induced Corrosion

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