312 High Cycle Fatigue Property of Shot peening Treated ADI in Long Life Fatigue

2001 ◽  
Vol 2001 (0) ◽  
pp. 251-252
Author(s):  
Takusaburo Hosoya ◽  
Takeshi Sekino ◽  
Kiyotaka Masaki ◽  
Takashi Matsumura ◽  
Yasuo Ochi
Keyword(s):  
Shot Peening ◽  
High Cycle Fatigue ◽  
Fatigue Property ◽  
Cycle Fatigue ◽  
Long Life

Research on Ultra-High Cycle Fatigue Property of 45 Steel

2011 ◽  
Vol 295-297 ◽  
pp. 1911-1914
Author(s):  
Ling Ling Jin ◽  
Cai Yan Deng ◽  
Dong Po Wang ◽  
Rui Ying Tian
Keyword(s):  
High Cycle Fatigue ◽  
Fatigue Testing ◽  
Fatigue Property ◽  
Sem Analysis ◽  
Test Results ◽  
Cycle Fatigue ◽  
Welded Structure ◽  
Ultrasonic Fatigue ◽  
Long Life ◽  
Ultra High Cycle Fatigue

Fatigue property of 45 steel was studied in this paper with the method of ultrasonic fatigue testing, and SEM was used to analyze microscopic characteristics of the fatigue fracture. Fatigue test results show that: S-N curves descend continuously after 108 cycles, there is no fatigue limit as the traditional fatigue conception describes. Therefore, it is very dangerous to design welded structure working in the ultra-high cycle interval with the fatigue strength corresponding to 5×106 cycles. In the super-long life range, the fatigue property of welded joints is worse than the base metal. SEM analysis shows that: fatigue crack mainly initiates from the defects in the surface or sub-surface.

scholarly journals High Cycle Fatigue Properties of Shot Peening Treated FPDI in Long Life Region.

1999 ◽  
Vol 65 (638) ◽  
pp. 2086-2091 ◽  
Author(s):  
Yasuo OCHI ◽  
Takeshi SEKINO ◽  
Shohei OKAZAKI ◽  
Takashi MATSUMURA
Keyword(s):  
Shot Peening ◽  
High Cycle Fatigue ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Long Life

Ultra-Long Life Fatigue Behavior of Welded Joints with Shot Blast Treatment

2013 ◽  
Vol 275-277 ◽  
pp. 179-183 ◽  
Author(s):  
Chao He ◽  
Yong Jie Liu ◽  
Qing Yuan Wang
Keyword(s):  
Fatigue Strength ◽  
Welded Joints ◽  
Shot Peening ◽  
High Cycle Fatigue ◽  
Base Material ◽  
Ambient Air ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Base Steel ◽  
Long Life

In order to investigate the ultra-long life fatigue properties of welded joints, ultrasonic fatigue tests of base material and welded joints were carried out using Q345q steel in ambient air at room temperature with a stress ratio R=-1. The results showed that the fatigue strength of specimens with welded joints dropped about 60% compared with that of base steel. To improve the fatigue properties of welded joints, two groups of specimens were treated by shot peening with different degrees which produced different compressive residual stresses on samples. It was found that the shot peening treatment could improve the fatigue strength of welded joints obviously. The fatigue fracture surface was analyzed by scanning electron microscopy. The fractography showed that there were two kinds of crack initiation mechanism in the Q345q base steel, crack inition from defects on the surface for high cycle fatigue failure and in the interior of the sample in very high cycle fatigue range. However, almost all cracks of welded joints initiated from defects caused by welding process. The failure of welded joints usually happened at the section of welded toes in the area of fusion or geometric discontinuity.

The High Cycle Fatigue Property of Mg-Gd-Y-Zn-Mn Alloy Enhanced by LPSO Phase

2021 ◽  
pp. 130367
Author(s):  
Chen Su ◽  
Jingfeng Wang ◽  
Linjie Zeng ◽  
Hao Hu ◽  
Shijie Liu
Keyword(s):  
High Cycle Fatigue ◽  
Fatigue Property ◽  
Cycle Fatigue ◽  
Lpso Phase

scholarly journals High cycle fatigue property of ultra-fine grained Cu-Cr-Zr alloys

2004 ◽  
Vol 2004.41 (0) ◽  
pp. 11-12
Author(s):  
Kazutaka MURANAKA ◽  
Takumi YAMAZAKI ◽  
Kazuo KITAGAWA
Keyword(s):  
High Cycle Fatigue ◽  
Fatigue Property ◽  
Cycle Fatigue ◽  
Fine Grained ◽  
Zr Alloys
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