Fatigue crack growth behaviour of a die-cast magnesium alloy AZ91D

2004 ◽  
Vol 58 (20) ◽  
pp. 2525-2529 ◽  
Author(s):  
P Venkateswaran ◽  
S Ganesh Sundara Raman ◽  
S.D Pathak ◽  
Y Miyashita ◽  
Y Mutoh
Keyword(s):  
Fatigue Crack ◽  
Magnesium Alloy ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Behaviour ◽  
Crack Growth Behaviour ◽  
Alloy Az91d ◽  
Die Cast ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium

Fatigue Crack Growth Studies on ZE41A Cast Magnesium Alloy

2009 ◽  
Vol 4 (2) ◽  
pp. 58-63
Author(s):  
M. Sivapragash ◽  
◽  
P.R. Lakshminarayanan ◽  
K. Raghukandan ◽  
R. Karthikeyan ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Magnesium Alloy ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Studies ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium

Fatigue of AZ91E-T6 Cast Magnesium Alloy

1993 ◽  
Vol 115 (4) ◽  
pp. 391-397 ◽  
Author(s):  
D. L. Goodenberger ◽  
R. I. Stephens
Keyword(s):  
Fatigue Crack ◽  
Magnesium Alloy ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Mean Stress ◽  
Cycle Fatigue ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium

The purpose of this research was to obtain room temperature fatigue behavior of AZ91E-T6 cast magnesium alloy and to determine if commonly used models that depict fatigue behavior are applicable to this cast alloy. Axial strain-controlled fatigue behavior using cylindrical specimens were employed to determine low cycle fatigue behavior with strain ratios R = εmin/εmax = 0, −1, and −2. The conventional log-log total strain low cycle fatigue model properly represented the R = −1 axial fatigue data. Significant mean stress relaxation occurred for all R = 0 and −2 axial fatigue tests. However, for the smaller strain amplitude tests with R = 0, sufficient mean stresses were retained such that fatigue life was reduced. The mean strains/stresses had little influence on the cyclic stress-strain curve which exhibited cyclic strain hardening. Mean stress effects were analyzed using the Morrow, SWT and Lorenzo-Laird models and similar, but oftentimes nonconservative, calculations resulted. Region I and II fatigue crack growth behavior was determined using C(T) speciments with load ratios R = Pmin/Pmax = 0.05 and 0.5. Values of ΔKth and (ΔKth)eff were less than 1.5 MPa m and the Paris equation slopes were between 3.3 and 3.9. Quasi-cleavage was predominant for both fatigue crack growth and final fracture regions. The commonly used low cycle fatigue and fatigue crack growth models appear to reasonably represent most of the results with this AZ91E-T6 cast magnesium alloy.

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