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Effect of Creep Stress on the Microstructure of 9–12% Cr Steel for Rotor Materials

Published online by Cambridge University Press:  06 August 2013

Jiling Dong ,
Yinsheng He ,
Minsoo Kim  and
Keesam Shin
Jiling Dong
Affiliation:
School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401-331, China School of Nano & Advanced Materials Engineering, Changwon National University, Changwon 641-773, Korea
Yinsheng He
Affiliation:
School of Nano & Advanced Materials Engineering, Changwon National University, Changwon 641-773, Korea
Minsoo Kim
Affiliation:
Doosan Heavy Industries & Construction Co. Ltd., Changwon 642-792, Korea
Keesam Shin*
Affiliation:
School of Nano & Advanced Materials Engineering, Changwon National University, Changwon 641-773, Korea
*
*Corresponding author. E-mail: keesam@changwon.ac.kr
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Abstract

High-chromium heat-resistant steel has been widely used as the key material to improve the condition of steam pressure and temperature in the modern high-efficiency power plants. Despite the use of the steel above 550°C for several decades, its major failure is owing to the creep fracture. In this study, the effect of creep stress on the microstructure in 9–12% Cr steel has been investigated microscopically, and it is clarified that the creep stress enhances precipitation of Laves phase and influences the lath width and dislocation density in lath interior.

Keywords

9–12% CrmicrostructurestressEBSDmechanical propertylifetime assessment
Type
Research Article
Information
Microscopy and Microanalysis , Volume 19 , Supplement S5: IUMAS , August 2013 , pp. 95 - 98
Copyright
Copyright © Microscopy Society of America 2013 

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References

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