Effect of Hot Working on the High Cycle Fatigue Behavior of WE43 Rare Earth Magnesium Alloy

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.

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

Journal of Materials Research ◽

10.1557/jmr.2014.286 ◽

2014 ◽

Vol 29 (21) ◽

pp. 2587-2595 ◽

Cited By ~ 3

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 ◽

Image Position

Abstract

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Vacuum retarding and air accelerating effect on the high-cycle and very-high-cycle fatigue behavior of a ZK60 magnesium alloy

Materials & Design ◽

10.1016/j.matdes.2020.109310 ◽

2021 ◽

Vol 198 ◽

pp. 109310

Author(s):

Yongjie Liu ◽

Yao Chen ◽

Chao He ◽

Fulin Liu ◽

Kun Yang ◽

...

Keyword(s):

Magnesium Alloy ◽

High Cycle Fatigue ◽

Fatigue Behavior ◽

Cycle Fatigue ◽

Very High Cycle Fatigue ◽

Zk60 Magnesium Alloy ◽

Very High

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High Cycle Fatigue Behavior of MB8 Magnesium Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.314-316.945 ◽

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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