scholarly journals 151 Rotating Bending Fatigue Strength Property of Gas-Soft-Nitrided SCM420 Steel and Influence of the Compound Layer on it

2008 ◽  
Vol 2008.57 (0) ◽  
pp. 37-38
Author(s):  
Yosuke Murai ◽  
Katsushi Saruki ◽  
Masaki Kuwabara ◽  
Koji Oobayashi
Keyword(s):  
Fatigue Strength ◽  
Strength Property ◽  
Compound Layer ◽  
Bending Fatigue ◽  
Rotating Bending Fatigue ◽  
Rotating Bending ◽  
Bending Fatigue Strength

High Cycle Fatigue Behavior of Thermally Oxidized Ti6Al4V Alloy

2007 ◽  
Vol 561-565 ◽  
pp. 2179-2182 ◽  
Author(s):  
Mehmet Cingi ◽  
Onur Meydanoglu ◽  
Hasan Guleryuz ◽  
Murat Baydogan ◽  
Huseyin Cimenoglu ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Yield Strength ◽  
Thermal Oxidation ◽  
Fatigue Behavior ◽  
Surface Hardness ◽  
Ti6al4v Alloy ◽  
Bending Fatigue ◽  
Rotating Bending Fatigue ◽  
Rotating Bending ◽  
Bending Fatigue Strength

In this study, the effect of thermal oxidation on the high cycle rotating bending fatigue behavior of Ti6Al4V alloy was investigated. Oxidation, which was performed at 600°C for 60 h in air, considerably improved the surface hardness and particularly the yield strength of the alloy without scarifying the tensile ductility. Unfortunately, the rotating bending fatigue strength at 5x106 cycles decreased from about 610 MPa to about 400 MPa upon oxidation. Thus, thermal oxidation leaded a reduction in the fatigue strength of around 34%, while improving the surface hardness (HV0.1) and yield strength 85 % and 36 %, respectively.

Rotating Bending Fatigue Strength and Fracture Mode of Shot Peened Materials under Various Conditions

2003 ◽  
Vol 2003 (0) ◽  
pp. 281-282 ◽  
Author(s):  
Eikyou BO ◽  
Kenji KANAZAWA ◽  
Ryuji IKEDA ◽  
Keiichi SATO ◽  
Akira TANGE
Keyword(s):  
Fatigue Strength ◽  
Fracture Mode ◽  
Bending Fatigue ◽  
Rotating Bending Fatigue ◽  
Rotating Bending ◽  
Bending Fatigue Strength

Study on Rotating Bending Fatigue Strength of FW・RP cylinder

2002 ◽  
Vol 2002 (0) ◽  
pp. 311-312
Author(s):  
Kenji SUNOUCHI ◽  
Toshihisa OHTSUKA ◽  
Hiroshi TAMURA ◽  
Yukiyoshi KOBAYASHI
Keyword(s):  
Fatigue Strength ◽  
Bending Fatigue ◽  
Rotating Bending Fatigue ◽  
Rotating Bending ◽  
Bending Fatigue Strength

scholarly journals Service Load and Fatigue Strength : Report13, The Effect of the Impulsive Load on the Rotating Bending Fatigue Strength

1969 ◽  
Vol 35 (271) ◽  
pp. 512-518
Author(s):  
Makoto MURAKI ◽  
Shosaku SHIMADA ◽  
Yoshihiko HAGIWARA ◽  
Itsuro AOKI ◽  
Takeshi KUNIO ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Impulsive Load ◽  
Bending Fatigue ◽  
Service Load ◽  
Rotating Bending Fatigue ◽  
Rotating Bending ◽  
Bending Fatigue Strength

Effect of Radical Nitriding on Fatigue Strength of Ni-Base Superalloy

2009 ◽  
Vol 417-418 ◽  
pp. 205-208 ◽  
Author(s):  
Kazuhiro Morino ◽  
Norio Kawagoishi ◽  
K. Yamane ◽  
K. Fukada
Keyword(s):  
Fatigue Strength ◽  
Base Alloy ◽  
Compound Layer ◽  
Fatigue Tests ◽  
Bending Fatigue ◽  
Propagation Behavior ◽  
Initiation And Propagation ◽  
Rotating Bending Fatigue ◽  
Rotating Bending ◽  
Base Superalloy

In order to investigate the effect of nitriding on the crack initiation and propagation behavior of Ni-base super alloy, Alloy 718, rotating bending fatigue tests were carried out until 108 cycles at room temperature. By nitriding at 500°C for 12h, compound layer of about 5μm in thickness was formed and the initiation of a fatigue crack was strongly suppressed causing the increase in fatigue strength. A crack initiated in brittle manner at the compound layer in all of fractures. However the crack propagated in ductile manner controlled by the property of the base alloy. That is, there is no or little influence of nitriding on the crack growth rate of the alloy.

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