Study of Property Degradation of T23 Heat‐resistant Steel based on Microstructural Evolution during Creep

In order to study the microstructural evolution and the effect on property degradation of T23 heat‐resistance steel (2.25Cr‐1.6W‐V‐Nb‐B‐N) during creep, creep rupture specimens were investigated at 823K, 873K and 923K. The microstuctural evolution was examined by optical, scanning and transmission e...

Full description

Saved in:
Bibliographic Details
Published in:Steel research international 2006-11, Vol.77 (11), p.844-848
Main Authors: Deng, Yongqing, Zhu, Lihui, Wang, Qijiang, Zou, Fengming
Format: Article
Language:English
Subjects:
Applied sciences
Coarsening
Creep
Degradation
Evolution
Exact sciences and technology
Heat resistant steels
heat‐resistant steel
High strength low alloy steels
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
microstructural evolution
Microstructure
property degradation
Recovery
Recrystallization
Steels
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In order to study the microstructural evolution and the effect on property degradation of T23 heat‐resistance steel (2.25Cr‐1.6W‐V‐Nb‐B‐N) during creep, creep rupture specimens were investigated at 823K, 873K and 923K. The microstuctural evolution was examined by optical, scanning and transmission electron microscopy. It has been noted that the creep property degradation of T23 is related to the decrease of dislocation density due to the recovery and recrystallization of the bainitic ferrite matrix and the martensite in the carbon‐rich islands, the coarsening of M23C6 carbides, and even the transformation from M23C6 to M6C. Coarsening of M23C6 is the dominating effect during short‐term creep whereas recovery and recrystallization is the key factor for long‐term creep. Property degradation is advanced at higher temperature due to the quicker recovery and recrystallization.
ISSN:1611-3683
1869-344X
DOI:10.1002/srin.200606470