0612 Effect of load ratio and specimen orientation on fatigue crack propagation behavior in the extruded magnesium alloy

2012 ◽  
Vol 2012.49 (0) ◽  
pp. 061201-061202
Author(s):  
Shun TANEGUCHI ◽  
Sotomi ISHIHARA ◽  
Yuki TOCHIKAWA ◽  
Takahito GOSHIMA
Keyword(s):  
Fatigue Crack ◽  
Magnesium Alloy ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Load Ratio ◽  
Fatigue Crack Propagation Behavior ◽  
Propagation Behavior ◽  
Specimen Orientation ◽  
Crack Propagation Behavior

Crystallographic Orientation Dependence of Fatigue Crack Propagation Behavior in Rolled AZ31 Magnesium Alloy

2010 ◽  
Vol 654-656 ◽  
pp. 723-726 ◽  
Author(s):  
Shigeki Morita ◽  
Nobuyoshi Ohno ◽  
Fujio Tamai ◽  
Yuji Kawakami
Keyword(s):  
Fatigue Crack ◽  
Magnesium Alloy ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Transverse Direction ◽  
Rolling Direction ◽  
Crack Propagation Rate ◽  
Fatigue Crack Propagation Behavior ◽  
Propagation Behavior ◽  
Crack Propagation Behavior

This paper deals with fatigue crack propagation behavior of rolled AZ31B magnesium alloy. Two types of specimens with the loading axis parallel to rolling direction were machined; fatigue crack propagation direction was parallel to transverse direction (L-T specimen), and short transverse direction (L-S specimen). Fatigue crack propagation tests were performed with center cracked plate tension specimen with stress ratio R=0.1 and frequency of 10Hz at room temperature. Crack propagation rate of L-T specimen was approximately 10 times higher than that of L-S specimen. SEM-EBSD observations revealed that the c-axis direction is unfavorable for the fatigue crack propagation in textured polycrystalline magnesium alloy.

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