Oxide Dispersion Strengthened (ODS) Alloy
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Specification, Chemical & Mechanical Performance
Overview
Oxide dispersion strengthened (ODS) alloys are a special class of superalloys produced by mechanical alloying (MA), wherein ultra-fine oxide dispersoids (<50 nm) are uniformly distributed throughout the alloy matrix. These nano-scale oxides act as highly stable barriers to dislocation motion and grain boundary migration, delivering exceptional high-temperature creep strength and oxidation resistance — enabling performance in extreme environments beyond the capability of conventional superalloys.
Key Advantages
|
Attribute |
Description |
|
Nano-Oxide Uniform Dispersion |
Sub-50 nm oxide particles (typically Y₂O₃) are homogeneously dispersed via mechanical alloying, creating an exceptionally stable reinforcement network. |
|
Ultra-High Temperature Creep Resistance |
Oxide dispersoids remain thermally stable at temperatures approaching the alloy’s melting point, far surpassing the temperature limit of precipitation-strengthened superalloys. |
|
Excellent Oxidation Resistance |
Protective alumina or chromia scales form at extreme temperatures, providing outstanding resistance to oxidation and hot corrosion. |
|
Ultra-Stable Microstructure |
Nano-oxides pin grain boundaries and inhibit recrystallization, maintaining fine-grain structure and mechanical properties after prolonged high-temperature exposure. |
Applications
- • Aerospace: Engine combustor liners, nozzle guide vanes
- • Industrial: High-temperature furnace linings and heating elements
- • Nuclear: Structural components for advanced reactors
Representative Grades
|
Chinese Grade |
International Equivalent |
Series |
|
MGH2756 |
MA956 / PM2000 |
Fe-based ODS |
|
MGH4754 |
MA754 / PM1000 |
Ni-based ODS |
|
MGH2757 |
MA957 |
Fe-based ODS |
