Prediction of creep crack initiation and growth for P91 at 600°C using MOD-NSW model

Jae Jun Han, Han Sang Lee, Yun-Jae Kim, Nak Hyun Kim, Woo Gon Kim, Hyeong Yeon Lee, Dong Wook Jerng

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper, predictions of creep crack initiation times and growth rates using the NSW-MOD model are compared with experimental data for the parent and weld metals of P91 at 600°C. For the weld metal, creep crack growth rates are found to be bounded by upper and lower bounds of the predictions, but creep crack initiation times are close to the upper bound. For the parent material, creep crack growth rates are bounded by upper and lower bounds of the predictions using the minimum creep rates, but creep crack initiation times are bounded by those using the average creep rates.

Original languageEnglish
Pages (from-to)125-136
Number of pages12
JournalStrength, Fracture and Complexity
Volume9
Issue number1
DOIs
Publication statusPublished - 2015 May 20

Keywords

  • analytical analysis
  • Creep crack growth rate
  • creep crack initiation time
  • modified NSW model
  • P91 martensitic steel

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics

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