High cycle fatigue behavior of different regions in a low-pressure sand-cast GW103K magnesium alloy component

2014 ◽  
Vol 29 (21) ◽  
pp. 2587-2595 ◽  
Author(s):  
Longkang Jiang ◽  
Wencai Liu ◽  
Yanlei Li ◽  
Guohua Wu ◽  
Wenjiang Ding
Keyword(s):  
Magnesium Alloy ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
Low Pressure ◽  
Cycle Fatigue ◽  
Alloy Component ◽  
Sand Cast ◽  
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Abstract

Effect of Solid Solution Treatment on Fatigue Behavior of Cast Magnesium Alloy

2013 ◽  
Vol 281 ◽  
pp. 436-440
Author(s):  
You Yang ◽  
Hua Wu ◽  
Zhao Feng Xuan
Keyword(s):  
Solid Solution ◽  
Magnesium Alloy ◽  
Fatigue Fracture ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
Solution Treatment ◽  
Cycle Fatigue ◽  
Solid Solution Treatment ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium

The effects of solid solution treatment on high cycle fatigue behavior of cast magnesium alloy AZ91D were investigated using an up-and-down load method. High cycle fatigue tests were carried out up to 107cycles at a stress ratio R=0.1 and frequency of 90Hz on specimens using a high frequency fatigue machine. The results showed that the fatigue strength of cast AZ91D magnesium alloy increase from 54.5Mpa to 71.5Mpa after solid solution treatment (T4) at 415°C, keeping temperature 16hours. The micro-fatigue fracture surface of alloy included fatigue initiation area, fatigue crack propagation area and fatigue fracture area. Fatigue crack of the alloys initiate principally at inclusions and shrinks under subsurface. The fatigue fracture of test specimens show the rupture characteristics of quasi-cleavage(as-cast alloy) and toughness(T4 alloy), respectively.

Role of stress in the high cycle fatigue behavior of advanced 9Cr/CrMoV dissimilarly welded joint

2016 ◽  
Vol 31 (2) ◽  
pp. 292-301 ◽  
Author(s):  
Chendong Shao ◽  
Fenggui Lu ◽  
Zhuguo Li ◽  
Yan Cai ◽  
Peng Wang ◽  
...  
Keyword(s):  
High Cycle Fatigue ◽  
Welded Joint ◽  
Fatigue Behavior ◽  
Cycle Fatigue ◽  
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Abstract

Influence of different casting processes on high cycle fatigue behavior of Mg–10Gd–3Y–0.5Zr alloy

2016 ◽  
Vol 31 (16) ◽  
pp. 2538-2548 ◽  
Author(s):  
Jimei Mao ◽  
Wencai Liu ◽  
Yanlei Li ◽  
Guangling Wei ◽  
Liang Zhang ◽  
...  
Keyword(s):  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cycle Fatigue ◽  
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Abstract

High Cycle Fatigue Behavior of MB8 Magnesium Alloy

2011 ◽  
Vol 314-316 ◽  
pp. 945-948
Author(s):  
You Yang ◽  
Hua Wu ◽  
Xue Song Li
Keyword(s):  
Fatigue Crack ◽  
Magnesium Alloy ◽  
Crack Propagation ◽  
Fatigue Fracture ◽  
Fatigue Crack Propagation ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
Fatigue Cracks ◽  
Fatigue Tests ◽  
Cycle Fatigue

High cycle fatigue behavior of MB8 magnesium alloy were investigated using an up-and-down load method. High cycle fatigue tests were carried out up to 107cycles at a stress ratio R=0.1 and frequency of 90Hz on specimens using a high frequency fatigue machine. Fatigue fracture surfaces of specimens that in the high cycle fatigue tests were also observed using a scanning electron microscope for revealing the micro-mechanisms of fatigue crack initiation and propagation. The results showed that fatigue limit of MB8 alloy at room temperature is 90.2 MPa under the numbers of cycle to failure Nf=107 conditions using up-and-down method calculation. The fatigue strength of the alloy is about 34% of its tensile strength. The micro-fatigue fracture surface of MB8 alloy included three representative regions. These regions are fatigue initiation area, fatigue crack propagation area and fatigue fracture area. Fatigue cracks of MB8 alloy initiate principally at surface and subsurface, and propagate along the grain boundary. The fatigue striations of fatigue crack propagation area are not clear. The fatigue fracture of test specimens show the rupture characteristics of dimple.

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