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2021 Vol.31, Issue 5 Preview Page
An Empirical Approach to Analyze Creep Rupture Behavior of P91 Steel
Muhammad Junaid Aslam1†
,
Cemil Hakan Gur12†
1Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Turkey
2Welding Technology and NDT Research/Application Center, Middle East Technical University, Ankara, Turkey
†Corresponding author E-Mail : e195211metu@gmail.com (M. J. Aslam, METU, Ankara)
May 2021. pp. 255-263
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Abstract

P91 steel has been a highly researched material because of its applicability for high-temperature applications. Considerable efforts have been made to produce experimental creep data and develop models for creep life prediction. As creep tests are expensive and difficult to conduct, it is vital to develop authenticated empirical methods from experimental results that can be utilized for better understanding of creep behavior and can be incorporated into computational models for reliable prediction of creep life. In this research, a series of creep rupture tests are performed on the P91 specimens within a stress range of 155 MPa to 200 MPa and temperature range of 640 °C (913 K) to 675 °C (948 K). The microstructure, hardness, and fracture surfaces of the specimens are investigated. To analyze the results of the creep rupture tests at a macro level, a parameter called creep work density is derived. Then, the relationships between various creep parameters such as strain, strain rate, time to rupture, creep damage tolerance factor, and creep work density are investigated, and various empirical equations are obtained.

Keywords
P91 Type 2 steel
creep life
creep damage
creep work density
strain energy density
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 31
  • No :5
  • Pages :255-263
  • Received Date : 2021-03-11
  • Revised Date : 2021-04-12
  • Accepted Date : 2021-04-21
  • DOI :https://doi.org/10.3740/MRSK.2021.31.5.255
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