The Role of Crack Closure on Fatigue Threshold at Elevated Temperatures
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概要
- 論文の詳細を見る
Near threshold fatigue crack growth and crack closure were investigated in SS 41, SM 41 A, SUS 304 steels and A 2218-T 6 Aluminum alloy at elevated temperatures up to 500℃. Emphasis was placed on examining the role of crack closure on fatigue threshold at elevated temperatures. The fatigue threshold,Δ K_<th> , was found to increase with increasing test temperature in all the steels tested, while it was found to decrease in A 2218-T 6 Aluminum alloy. Oxide-induced crack closure was found to play an important role in the in crease of ΔK_<th> at elevated temperatures in SM 41 A, while it was found to play a less important role in SS 41 and SUS 304. It was concluded that oxide products on the fracture surface enhance crack closure only when the CTOD at threshold remains small at elevated temperatures.
- 一般社団法人日本機械学会の論文
- 1988-01-15
著者
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MIYOSHI Yoshio
Department of Mechanical Systems Engineering, School of Engineering, University of Shiga Prefecture
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Ogura Keiji
Faculty Of Engineering Science Osaka University
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Miyoshi Yoshio
Faculty Of Engineering Science Osaka Univerty
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Miyoshi Yoshio
Faculty Of Engineering Science Osaka University
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Miyoshi Yoshio
Department Of Mechanical Systems Engineering School Of Engineering University Of Shiga Prefecture
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Nishikawa Izuru
Faculty Of Engineering Science Osaka Univerty
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GOTOH Tsuyoshi
Mazda Co. Ltd.,
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Gotoh Tsuyoshi
Mazda Co. Ltd.
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