Effect of Normalization Temperature on Creep Strength of Modified 9Cr-1Mo Steel
Journal Article
·
· Metallurgical and Materials Transactions A
The effect of normalization temperature from 850 to 1050°C on the structure and creep-rupture properties of modified 9Cr-1Mo steel was studied. Normalization at temperatures less than 925°C resulted in structures containing significant polygonized, recovered ferrite. These structures had poor creep-rupture strength; roughly two orders of magnitude increase in minimum creep rate or decrease in rupture life for 850°C compared to 1050°C normalization at test conditions of 600°C and 145 MPa. Room-temperature strength and hardness were also reduced. Normalization at temperatures between 925°C and 1000°C also resulted in reduced creep strength in comparison with 1050°C normalization, even though tempered martensite microstructures were formed and little change in room temperature strength was observed–the reduction was attributed to subtle differences in fine MX precipitates. The effect of reduced normalization temperature was more pronounced for higher temperature, lower stress creep-rupture conditions.
- Research Organization:
- Idaho National Laboratory (INL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC07-99ID13727
- OSTI ID:
- 912343
- Report Number(s):
- INL/JOU-05-00784
- Journal Information:
- Metallurgical and Materials Transactions A, Journal Name: Metallurgical and Materials Transactions A Journal Issue: 5 Vol. 37A; ISSN 1073-5623
- Country of Publication:
- United States
- Language:
- English
Similar Records
Microstructural Stability During Creep Exposure of 9Cr-1Mo Steel Treated at Different Normalization Temperatures
Effect of Austenization Temperature on the Microstructure and Strength of 9% and 12% Cr Ferritic-Martensitic Steels
Fabrication and metallurgical properties of modified 9Cr-1Mo steel
Journal Article
·
Wed May 15 00:00:00 EDT 2019
· Journal of Materials Engineering and Performance
·
OSTI ID:22970776
Effect of Austenization Temperature on the Microstructure and Strength of 9% and 12% Cr Ferritic-Martensitic Steels
Conference
·
Fri Oct 01 00:00:00 EDT 2004
·
OSTI ID:910829
Fabrication and metallurgical properties of modified 9Cr-1Mo steel
Conference
·
Mon Dec 31 23:00:00 EST 1984
· Proc., Am. Pet. Inst., Refin. Dep.; (United States)
·
OSTI ID:5975076