Overview
Oxide dispersion strengthened (ODS) Ferritic-Martensitic/Ferritic/Austenitic steels are endowed with high temperature strength and resistance to creep, fatigue, oxidation and hot corrosion. Hence, these steels are potential candidates for the components in nuclear reactors, gas and ultra super critical steam turbines which are exposed to temperatures up to about 700C. The high temperature properties of ODS steels are due to the fine grained microstructure, nanosized oxide (Y-Ti-O complex) dispersoids and stability of the microstructure at high temperatures. ARCI has embarked on major programmes for development and demonstration of technologies for the manufacture of blades for ultra super critical steam turbines, clad tubes of fast breeder reactor and high pressure compressor and low pressure turbine blades for gas turbines.
Key Features
- High operating temperature of 650-700°C
- High yield strength and creep resistance
- Potential candidates to replace nickel based super alloys
- Rsistance to swelling under irradiation
- Established manufacturing processes
Potential Applications
- Blades for ultra super critical steam turbines
- High pressure compressor and low pressure turbine blades of gas turbines
- Clad tubes for nuclear reactors
- Structural materials for fusion reactors
- Other high temperature applications
Status
- Established manufacturing processes at pilot plant scale
- Performance and stability are validated at prototype level
- Further evaluation is underway
Intellectual Property Development Index (IPDI)
Level
1
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8
9
10
Description
Basic concepts and understanding of underlying scientific principles
Shortlisting possible applications
Research to prove technical feasibility for targeted application
Coupon level testing in simulated conditions
Check repeatability/consistency
Prototype testing in real-life conditions
Check repeatability/consistency
Reassessing feasibility (IP, competition technology, commercial)
Initiate technology transfer
Support in stabilizing production
Status
| Level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
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| Description | Basic concepts and understanding of underlying scientific principles | Shortlisting possible applications | Research to prove technical feasibility for targeted application | Coupon level testing in simulated conditions | Check repeatability/consistency | Prototype testing in real-life conditions | Check repeatability/consistency | Reassessing feasibility (IP, competition technology, commercial) | Initiate technology transfer | Support in stabilizing production |
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Technology Readiness Level (TRL)
| TRL | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|
| Description | Basic Principles | Concept Formulation | Proof of Concept | Lab Validation | Relevant Environment | Prototype Demo | Operational Demo | System Qualified | Proven / Market Ready |
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- S. Santra, S. Amirthapandian, A. J. London, B. K. Panigrahi, R.M. Sarguna, S.Balaji, R.Vijay, C. S. Sundar and C. Grovenor, Effect of Ti and Cr on dispersion and structure of oxide nano-particles in model ODS alloys, Acta Mater. 97 (2015) 223-233.
- M. Nagini, R. Vijay, Koteswararao V. Rajulapati, K. Bhanu Sankara Rao, M. Ramakrishna, A.V. Reddy and G. Sundararajan, Effect of process parameters on microstructure and hardness of oxide dispersion strengthened 18Cr ferritic steel, Metall Mater. Trans. A, 47 (2016) 4197-4209
- K. Suresh, M. Nagini, R. Vijay, M. Ramakrishna, Ravi C. Gundakaram, A.V. Reddy and G. Sundararajan, Microstructural studies of oxide dispersion strengthened austenitic steels, Mater. Design, 110 (2016) 519-525.
- M. Nagini, R. Vijay, Koteswararao V. Rajulapati, A.V. Reddy and G. Sundararajan, Microstructure-mechanical property correlation in oxide dispersion strengthened 18Cr ferritic steel, Mater. Sci. Eng. A, 708 (2017) 451-459.
- M. Nagini, K.G. Pradeep, R. Vijay, A.V. Reddy, B.S. Murthy, G. Sundararajan, A combined electron microscopy, atom probe tomography and small angle X-ray scattering study of oxide dispersion strengthened 18Cr ferritic steel, Mater. Char., 164 (2020) 110306