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

doi:10.3233/SFC-150184

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

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	125-136
Number of pages	12
Journal	Strength, Fracture and Complexity
Volume	9
Issue number	1
DOIs	https://doi.org/10.3233/SFC-150184
Publication status	Published - 2015 May 20

Keywords

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

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.3233/SFC-150184

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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.",

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AU - Han, Jae Jun

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AU - Kim, Woo Gon

AU - Lee, Hyeong Yeon

AU - Jerng, Dong Wook

PY - 2015/5/20

Y1 - 2015/5/20

N2 - 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.

AB - 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.

KW - Creep crack growth rate

KW - P91 martensitic steel

KW - analytical analysis

KW - creep crack initiation time

KW - modified NSW model

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

Abstract

Keywords

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