Premium
Assessment of creep rupture properties for dissimilar steels welded joints between T92 and HR3C
Author(s) -
GONG YI,
CAO JIAN,
JI LINA,
YANG CHAO,
YAO CHENG,
YANG ZHENGUO,
WANG JUN,
LUO XIAOMING,
GU FUMING,
QI ANFANG,
YE SHANGYUN,
HU ZHENGFEI
Publication year - 2011
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.2010.01496.x
Subject(s) - materials science , creep , welding , austenite , metallurgy , joint (building) , microstructure , optical microscope , residual stress , scanning electron microscope , composite material , structural engineering , engineering
Dissimilar steels welded joints, between ferritic steel and austenitic stainless steel, are always encountered in high‐temperature components in power plants. As two new grade ferritic steel and austenitic stainless steel, T92 (9Cr0.5Mo2WVNb) and HR3C (TP310HCbN), exhibit superior heat strength at elevated temperatures and are increasingly applied in ultra‐supercritical (USC) plants around the world, a complete assessment of the properties for T92/HR3C dissimilar steels welded joints is urgently required. In this paper, metallographic microstructures across the joint were inspected by optical microscope. Particularly, the creep rupture test was conducted on joints under different load stresses at 625 °C to analyse creep strength and predict their service lives, while their fractograph were observed under scanning electron microscope. Additionally, finite element method was employed to investigate residual stress distribution of joints. Results showed that the joints were qualified under USC conditions, and T92 base material was commonly the weakest part of them.