Creep-fatigue damage and life evaluation for boiler header stub weldment

Takuya Ito, Isamu Nonaka, Hideo Umaki, Hidetaka Nishida, Shizuma Shintani

研究成果: Conference article査読

抄録

In order to clarify the creep-fatigue damage process and to evaluate the creep-fatigue life for boiler 2.25 Cr-1 Mo header stub welds, a series of creep-fatigue tests were performed on partial mock-up specimens of actual plant under simulated plant loading conditions. Creep voids and micro-cracks occurred along the weld toes at an early stage of life and grew to form many short cracks. These short cracks grew both on the surface and through the wall of the stub tube and later coalesced to form one crack. It was proved that there was a correlation between the maximum crack depth and life ratio and also that there was a correlation between the maximum crack depth and the maximum crack length on the surface. A life prediction method was proposed based on these two correlations.

本文言語English
ページ(範囲)33-40
ページ数8
ジャーナルAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
438
DOI
出版ステータスPublished - 2002 10 12
イベントNew and Emerging Computational Methods: Applications to Fracture, Damage and Reliability (2002 ASME Prssure Vessels and Piping Conference) - Vancouver, BC, Canada
継続期間: 2002 8 52002 8 9

ASJC Scopus subject areas

  • 機械工学

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