Effect of Aging on the Creep Properties and Microstructural Evolution of P92 Steel

The P92 steels were aged at 632°C for 500hrs and 1,000hrs, and creep ruptured at 650°C~625°C with stress of 120~110 MPa. The creep rupture life (CRL) of the aged samples was decreased with the aged time. The microstructure of the P92 steel was observed as fine tempered lath with dispersion of Cr-ric...

Full description

Saved in:
Bibliographic Details
Published in:Key Engineering Materials 2017, Vol.727, p.52-58
Main Authors: Chang, Jung Chel, Shin, Kee Sam, Lee, Jeh Yun, He, Yin Sheng
Format: Article
Language:English
Subjects:
Aging
Aging (metallurgy)
Chromium molybdenum vanadium steels
Corrosion resistance
Creep (materials)
Evolution
Grain boundaries
Heat resistance
Heat resistant steels
High strength steels
Laves phase
Microstructure
Power plants
Recovery
Steel
Steels
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The P92 steels were aged at 632°C for 500hrs and 1,000hrs, and creep ruptured at 650°C~625°C with stress of 120~110 MPa. The creep rupture life (CRL) of the aged samples was decreased with the aged time. The microstructure of the P92 steel was observed as fine tempered lath with dispersion of Cr-rich M23C6 along various grain boundaries. Upon aging and creep, recovery of lath and precipitation of coarse W-rich Laves phase were characterized as the main microstructural change. The M23C6 is relatively stable upon the short-term aging and creep. Decrease of the CRL of the aged specimens is considered as the degradations of microstructure such as the recovery of lath due to the dislocation annihilation and precipitation of coarse Laves phase.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.727.52