Paper Title:
Effects of Microstructures on Strength and Fatigue Properties of Long-Term-Serviced F12 Steels
  Abstract

Microstructures of long-term serviced F12 steel exposed at 545 °C have been investigated by electron microscopes. The hardness of the material was measured to be correlated with the variation of the microstructures. Fatigue properties of the material with different running time were evaluated and analyzed. The experimental results show that the coarsening of the precipitated carbides along boundaries and the formation of subgrains accelerate the degradation of the long-term creep properties of the steel. Fatigue crack initiation threshold from a notch linearly deceases with increasing the running time due to the variation of the distribution and the shape of the precipitated carbides. The degradation mechanisms of the F12 steel during their long-term service at high temperature are discussed.

  Info
Periodical
Key Engineering Materials (Volumes 353-358)
Edited by
Yu Zhou, Shan-Tung Tu and Xishan Xie
Pages
295-298
DOI
10.4028/www.scientific.net/KEM.353-358.295
Citation
X.M. Wu, G.P. Zhang, J.Q. Zhang, W.G. Chen, "Effects of Microstructures on Strength and Fatigue Properties of Long-Term-Serviced F12 Steels", Key Engineering Materials, Vols. 353-358, pp. 295-298, 2007
Online since
September 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Grzegorz Golański
Abstract:The paper presents results of research on the influence of ageing on the microstructure and mechanical properties of T24 steel. The examined...
56
Authors: Yang Zheng Zeng, Kai Ming Wu, Feng Hu, Hua Zheng
Chapter 4: Materials Forming
Abstract:The effect of partitioning process of quenching-partitioning-tempering (Q-P-T) process on hardness and microstructure were investigated. The...
1053
Authors: Jun Ru Li, Chen Gong, Le Yu Zhou, Lie Chen, Hui Zuo, Ya Zheng Liu
Symposium S: Materials for Mechanical Engineering and Processing Technology
Abstract:In this work, the effects of final heat treatment including quenching and tempering process on mechanical properties of 10Cr12Ni3Mo2VN steel...
472
Authors: Magdy M. El Rayes, Ehab A. El-Danaf, Abdulhakim A. Almajid
Chapter 1: Metals and Alloys, Materials Processing Technologies
Abstract:Degradation of properties due to ageing at high temperature service is a common problem which normally occurs in electricity generation power...
31
Authors: Nadezhda Dudova, Roman Mishnev, Rustam Kaibyshev
Chapter 2: Contributed Papers
Abstract:A 10%Cr martensitic steel with 3%Co and 0.008%B tempered at 770°C exhibits no creep strength breakdown at a temperature of 650°C up to an...
465