High-temperature fatigue crack growth behavior of 17-4 PH stainless steels at various load ratios

C. K. Lin, K. C. Hsu

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

The high-temperature fatigue crack growth (FCG) behavior at 400 and 500°C was investigated for variously heat-treated 17-4 PH stainless steels under different load ratios. Results indicated the FCG rates (FCGRs) at 400°C increased with R-ratio at the low ΔK regime and merged together at the high ΔK regime for all the given heat-treated conditions, except for a peak-aged condition. At 500°C, the FCGRs of the given alloys increased with R-ratio at low R-ratios and became comparable at high R-ratios. The variations of FCGR with R-ratio could be described as an intrinsic FCG behavior based on a Unified Approach. Accordingly, the predominant FCG mechanism was similar to a general plastic blunting process except for the high R-ratio regime of the peak-aged condition tested at 400°C.

原文???core.languages.en_GB???
主出版物標題12th International Conference on Fracture 2009, ICF-12
頁面201-210
頁數10
出版狀態已出版 - 2009
事件12th International Conference on Fracture 2009, ICF-12 - Ottawa, ON, Canada
持續時間: 12 7月 200917 7月 2009

出版系列

名字12th International Conference on Fracture 2009, ICF-12
1

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???event.eventtypes.event.conference???12th International Conference on Fracture 2009, ICF-12
國家/地區Canada
城市Ottawa, ON
期間12/07/0917/07/09

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