A5103238360- High Temperature Alloys and Creep
- Microstructure and Mechanical Properties of Steels
- High-Temperature Coating Behaviors
- Metallurgy and Material Forming
- Metal Alloys Wear and Properties
- High Entropy Alloys Studies
- Advanced materials and composites
- Advanced Materials Characterization Techniques
- Fusion materials and technologies
- Nuclear Materials and Properties
- Additive Manufacturing Materials and Processes
- Metal and Thin Film Mechanics
- Material Properties and Applications
- Microstructure and mechanical properties
- Metallurgical Processes and Thermodynamics
- Powder Metallurgy Techniques and Materials
Central South University
2019-2023
Institute of New Materials
2023
In this work, two Ni-based superalloys with 13 wt.% and 35 Co were prepared via selective laser melting (SLM), the effects of on microstructure mechanical properties additively manufactured investigated. As fraction increased from to wt.%, average grain size decreased 25.69 μm 17.57 μm, nano-phases significantly 80.54 nm 230 nm. Moreover, morphology γ' phase changed that a cuboid sphere, since γ/γ' lattice mismatch 0.64% 0.19%. At room temperature, yield strength ultimate tensile 13Co alloy...
The effects of different boron (B) additions from 0 to 0.5 wt.% on the microstructure and properties Fe-Mo-Cu-Ni-xB-C powder metallurgy (PM) steels were investigated in this work. results indicated that ferrite phase quantity decreased disappeared, Ni/Cu became more homogeneous, M2B formed, with addition B. density hardness sintered monotonously increased increasing B content, whereas tensile strength impact toughness first then decreased. reached a maximum value 1097 MPa at 0.2% 25.7 J/cm2...
Solid solution strengthening (SSS) is one of the main contributions to desired tensile properties nickel-based superalloys for turbine blades and disks. The value SSS can be calculated by using Fleischer’s Labusch’s theories, while model parameters are incorporated without fitting experimental data complex alloys. In this work, four diffusion multiples consisting multicomponent alloys pure Ni prepared characterized. composition microhardness single γ phase regions in samples used quantify...
Two Ni60A alloy coatings with different C contents prepared by flame spraying and remelting were investigated means of XRD, SEM, EBSD, friction wear testing, thermodynamic calculation, etc. The results showed that the calculated solidification temperature interval decreased from 983–1165.9 °C to 980–1154.279 melting 996.27–1065.45 958.91–1023.32 when content increased 0.72 wt% (S1) 1.01 (S2). Besides, Cr7C3 phase size layer increase addition. coating shrinks during process, inner pores do...
Optimizing preparation process of powder metallurgy (P/M) nickel-base superalloys is critical to obtain a desired material. In this study, new high-throughput consolidation introduced optimize the process, microstructure and properties P/M superalloys. The influences temperature, strain rate ball milling time on hardness were studied. relationship among was established, nanoparticles strengthening grain boundary in ODS discussed. results indicate that increasing time, moderately low...
Thermo-mechanical process of nickel-based oxide dispersion strengthened (ODS) superalloys is critical to produce desired components. In this study, an efficient method consolidating powder introduced optimize the preparation process, microstructure and properties ODS superalloys. The influences consolidation temperature, strain rate ball milling time on hardness were studied. relationship among was established, nanoparticles strengthening grain boundary in discussed. results indicate that...