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Optimizing the Thermomechanical Process of Nickel-Based ODS Superalloys by an Efficient Method
Wuqiang He1,2, Feng Liu1,2, Liming Tan1,2
1State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China.
Optimizing the thermo-mechanical processing of nickel-based oxide dispersion strengthened (ODS) superalloys enhances their hardness. Key factors include extended ball milling, moderate temperatures, and high strain rates for superior material properties.
Area of Science:
- Materials Science
- Metallurgical Engineering
Background:
- Nickel-based oxide dispersion strengthened (ODS) superalloys are critical for high-performance components.
- Thermo-mechanical processing significantly influences the microstructure and properties of these alloys.
Purpose of the Study:
- To introduce an efficient powder consolidation method for optimizing nickel-based ODS superalloys.
- To investigate the impact of processing parameters on alloy properties.
Main Methods:
- Studied the effects of consolidation temperature, strain rate, and ball milling time.
- Established relationships between processing, microstructure, and hardness.
- Analyzed nanoparticle and grain boundary strengthening mechanisms.
Main Results:
- Long ball milling times, moderately low consolidation temperatures, and high strain rates improve alloy properties.
- Dispersion strengthening by nanoparticles and grain boundary strengthening are crucial for enhanced performance.
Conclusions:
- The study establishes a clear link between processing parameters and the resulting microstructure and hardness.
- Optimized thermo-mechanical processing is vital for achieving superior properties in nickel-based ODS superalloys.
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