Nondestructive Evaluation of Structural Change due to Creep Degradation in P91 Steel by Micromagnetic Properties

Takanori Matsumoto, Tetsuya Uchimoto, Toshiyuki Takagi, Klaus Szielasko, Madalina Rabung

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)


In this study, to evaluate the structural change due to creep degradation in P91 steels nondestructively by means of the micromagnetic multiparameter microstructure and stress analysis (3MA) device, information of dislocation density change is extracted from micromagnetic properties. Micromagnetic properties of the creep and thermal aging samples are measured by 3MA device. The relationship between measured micromagnetic properties and the low-angle grain boundary length of the samples quantified as the alternative value of dislocation density by Electron Back Scatter Diffraction (EBSD) equipment are investigated. Change of dislocation density due to creep degradation can be evaluated by some micromagnetic properties which are independent on precipitation change.

Original languageEnglish
Title of host publicationElectromagnetic Nondestructive Evaluation (XX)
EditorsArtur Lopes Ribeiro, Artur Lopes Ribeiro, Helena Geirinhas Ramos, Helena Geirinhas Ramos
PublisherIOS Press
Number of pages9
ISBN (Electronic)9781614997665
Publication statusPublished - 2017

Publication series

NameStudies in Applied Electromagnetics and Mechanics
ISSN (Print)1383-7281
ISSN (Electronic)1879-8322


  • 3MA
  • Nondestructive evaluation
  • P91
  • creep
  • micromagnetic property

ASJC Scopus subject areas

  • Mechanical Engineering
  • Electrical and Electronic Engineering


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