Paper Title:
Stress Dependence of Microstructural Evolution in Heat Resistant Steels
  Abstract

The state of the microstructure of ferritic heat resistant steels during creep was evaluate by the system free energy, which composes mainly chemical free energy, surface energy and elastic strain energy, and its stress dependence was expressed quantitatively by using a relaxation time. The steels used in this study were P91 (9Cr-1Mo-C-N-V-Nb) steel and P92 (9Cr-Mo-W-C-N-V-Nb-B) steel. The obtained results are as follows: (1) the relaxation time of elastic strain energy was expressed as a function of stress and temperature, (2) surface energy of P92 scarcely decreased during creep due to the formation of the Laves phase, and (3) the relaxation time of the chemical free energy in P92 was larger than that in P91.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
190-193
DOI
10.4028/www.scientific.net/MSF.654-656.190
Citation
Y. Murata, Y. Saoto, Y. Tsukada, T. Koyama, M. Morinaga , Y. Sasaki, Y. Hasegawa, "Stress Dependence of Microstructural Evolution in Heat Resistant Steels ", Materials Science Forum, Vols. 654-656, pp. 190-193, 2010
Online since
June 2010
Export
Price
$35.00
Share

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

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

Authors: Fujio Abe
Abstract:The effect of boron on microstructure evolution and creep deformation behavior has been investigated for a tempered martensitic...
569
Authors: Vàclav Sklenička, Květa Kuchařová, Milan Svoboda, Ivan Saxl
Abstract:Critical high temperature components of machines and structures are often subjected to complicated load and temperature histories. The...
81
Authors: Alla Kipelova, Rustam Kaibyshev, Andrey Belyakov, Izabella Schenkova, Vladimir Skorobogatykh
Abstract:The microstructural changes in a 3%Co modified P911 heat resistant steel were examined under static annealing and creep at elevated...
295
Authors: Aleksey Korneev, D.S. Zmienko, A.S. Gudenko, P.A. Kozlov, A.E. Korneev
Chapter 6: Energy Materials
Abstract:Our report deals with investigation of evolution of AB2 phase in three melts of new 9% Cr heat resistant steel with different...
865
Authors: Valeriy Dudko, Andrey Belyakov, Vladimir Skorobogatykh, Izabella Schenkova, Rustam Kaibyshev
Poster Session 1
Abstract:Structural changes in a 9%Cr martensitic steel after 1%, 4% creep and creep rupture test at 650°C and stress of 118 MPa were examined. Heat...
895