Analysis of 316H creep crack initiation data at 550 °C using a crack tip constraint parameter

Seung Ho Lee; Hyun Woo Jung; Yun Jae Kim; Kamran Nikbin; Robert A. Ainsworth

doi:10.1016/j.engfracmech.2021.107746

Analysis of 316H creep crack initiation data at 550 °C using a crack tip constraint parameter

Seung Ho Lee, Hyun Woo Jung, Yun Jae Kim, Kamran Nikbin, Robert A. Ainsworth

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

8 Citations (Scopus)

Abstract

In this paper, 316H creep crack growth data at 550 °C are analysed to investigate the effect of in-plane constraint on creep crack initiation times. A constraint parameter is proposed to quantify the difference between an actual opening stress and the Riedel-Rice opening stress field in plane strain, using experimentally measured C*. Test data analysis shows that creep crack initiation times can be well characterized by the C* integral with the proposed parameter. A modified form of a model due to Nikbin, Smith and Webster is suggested, and scatter in predictions is shown to be reduced from ~40 to ~5.

Original language	English
Article number	107746
Journal	Engineering Fracture Mechanics
Volume	248
DOIs	https://doi.org/10.1016/j.engfracmech.2021.107746
Publication status	Published - 2021 May 1

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

316H creep crack growth data at 550 °C
Creep crack initiation time
Creep crack tip constraint parameter

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1016/j.engfracmech.2021.107746

Cite this

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abstract = "In this paper, 316H creep crack growth data at 550 °C are analysed to investigate the effect of in-plane constraint on creep crack initiation times. A constraint parameter is proposed to quantify the difference between an actual opening stress and the Riedel-Rice opening stress field in plane strain, using experimentally measured C*. Test data analysis shows that creep crack initiation times can be well characterized by the C* integral with the proposed parameter. A modified form of a model due to Nikbin, Smith and Webster is suggested, and scatter in predictions is shown to be reduced from ~40 to ~5.",

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AU - Lee, Seung Ho

AU - Jung, Hyun Woo

AU - Kim, Yun Jae

AU - Nikbin, Kamran

AU - Ainsworth, Robert A.

PY - 2021/5/1

Y1 - 2021/5/1

N2 - In this paper, 316H creep crack growth data at 550 °C are analysed to investigate the effect of in-plane constraint on creep crack initiation times. A constraint parameter is proposed to quantify the difference between an actual opening stress and the Riedel-Rice opening stress field in plane strain, using experimentally measured C*. Test data analysis shows that creep crack initiation times can be well characterized by the C* integral with the proposed parameter. A modified form of a model due to Nikbin, Smith and Webster is suggested, and scatter in predictions is shown to be reduced from ~40 to ~5.

AB - In this paper, 316H creep crack growth data at 550 °C are analysed to investigate the effect of in-plane constraint on creep crack initiation times. A constraint parameter is proposed to quantify the difference between an actual opening stress and the Riedel-Rice opening stress field in plane strain, using experimentally measured C*. Test data analysis shows that creep crack initiation times can be well characterized by the C* integral with the proposed parameter. A modified form of a model due to Nikbin, Smith and Webster is suggested, and scatter in predictions is shown to be reduced from ~40 to ~5.

KW - 316H creep crack growth data at 550 °C

KW - Creep crack initiation time

KW - Creep crack tip constraint parameter

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VL - 248

JO - Engineering Fracture Mechanics

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ER -

Analysis of 316H creep crack initiation data at 550 °C using a crack tip constraint parameter

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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