Effect of multi-axial stress on creep damage behavior for notched specimen of P92 steel

Haruhisa Shigeyama, Ryuji Sugiura, A. Toshimitsu Yokobori, Takashi Matsuzaki

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

In this study, interrupted creep crack growth tests were conducted using C(T) specimen with side-grooves and circular notched round bar specimen of P92 steel. After the interrupted tests, to investigate the creep crack growth and damage progression behaviors of P92 steel under the multi-axial stress field, cross-sectional observations around the notch and crack tip were conducted. From the measurement results of the change of micro Vickers hardness and void area fraction with creep time, it was indicated that the region of low hardness and high void area fraction were existed near the notch or crack tip. Then, three-dimensional elastic-plastic creep analyses were conducted for each specimen. From the results of finite element analyses, the regions of high hydrostatic stress and high tri-axiality factor were in good agreement with the region of high void area fraction for each specimen. This result indicated that the multi-axial stress field contributes to the void formation. Furthermore, the effects of the absolute value and gradient of tri-axiality factor on void formation were discussed.

本文言語English
ホスト出版物のタイトルASME 2013 Pressure Vessels and Piping Conference, PVP 2013
DOI
出版ステータスPublished - 2013
外部発表はい
イベントASME 2013 Pressure Vessels and Piping Conference, PVP 2013 - Paris, France
継続期間: 2013 7月 142013 7月 18

出版物シリーズ

名前American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
6 A
ISSN(印刷版)0277-027X

Other

OtherASME 2013 Pressure Vessels and Piping Conference, PVP 2013
国/地域France
CityParis
Period13/7/1413/7/18

ASJC Scopus subject areas

  • 機械工学

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