Effect of damage on fatigue crack growth rate under high-temperature creep-fatigue multiplication

Toshimitsu Yokobori; Yoshiyuki Kaji; Takashi Kuriyama; Takeo Yokobori

Effect of damage on fatigue crack growth rate under high-temperature creep-fatigue multiplication

Toshimitsu Yokobori, Yoshiyuki Kaji, Takashi Kuriyama, Takeo Yokobori

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

Abstract

The characterization for the crack growth rate and the progressive damage region around the crack tip of SUS 304 stainless steel were investigated with various holding times at the maximum stress in a trapozoidal wave in a vacuum at 680°C. From these experimental results, the crack growth rate approaches the creep crack growth rate, and the geometry of the progressive damage region around the crack tip becomes similar with the increase of stress holding time. The fracture surface shows integranular features dominated by creep in the case of with stress holding time, but does not show without stress holding time. This is distinguished from a triangular wave with no stress holding time, where the fracture implicitly involves fatigue and creep effects.

Original language	English
Pages (from-to)	2349-2354
Number of pages	6
Journal	Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume	57
Issue number	542
Publication status	Published - 1991 Oct
Externally published	Yes

ASJC Scopus subject areas

Mechanical Engineering

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Effect of damage on fatigue crack growth rate under high-temperature creep-fatigue multiplication. / Yokobori, Toshimitsu; Kaji, Yoshiyuki; Kuriyama, Takashi; Yokobori, Takeo.

In: Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, Vol. 57, No. 542, 10.1991, p. 2349-2354.

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

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N2 - The characterization for the crack growth rate and the progressive damage region around the crack tip of SUS 304 stainless steel were investigated with various holding times at the maximum stress in a trapozoidal wave in a vacuum at 680°C. From these experimental results, the crack growth rate approaches the creep crack growth rate, and the geometry of the progressive damage region around the crack tip becomes similar with the increase of stress holding time. The fracture surface shows integranular features dominated by creep in the case of with stress holding time, but does not show without stress holding time. This is distinguished from a triangular wave with no stress holding time, where the fracture implicitly involves fatigue and creep effects.

AB - The characterization for the crack growth rate and the progressive damage region around the crack tip of SUS 304 stainless steel were investigated with various holding times at the maximum stress in a trapozoidal wave in a vacuum at 680°C. From these experimental results, the crack growth rate approaches the creep crack growth rate, and the geometry of the progressive damage region around the crack tip becomes similar with the increase of stress holding time. The fracture surface shows integranular features dominated by creep in the case of with stress holding time, but does not show without stress holding time. This is distinguished from a triangular wave with no stress holding time, where the fracture implicitly involves fatigue and creep effects.

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Effect of damage on fatigue crack growth rate under high-temperature creep-fatigue multiplication

Abstract

ASJC Scopus subject areas

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