Corrosion fatigue behavior of die-cast and shot-blasted AM60 magnesium alloy

The high-frequency corrosion fatigue behavior of extruded AZ31 magnesium alloy was investigated in different environments: air, gear oil and 3.5% NaCl solution. Compared with that in air, the corrosion fatigue limits were degraded by approximately 3.52% and 58.91%, respectively, and the corrosion fatigue lives were shortened by about 13.43% and 89.36%, respectively. In the same environment, the high-frequency fatigue limits are all higher than those tested at low frequency. The specimen geometrical shape plays a certain factor on stage characteristics of S–N curves. Compared with that of arc transition specimens, the stress sensitivity of line transition specimens is only reflected in a relatively high cycle fatigue life region. Different environments influence the corrosion failure kinetics processes (the crack initiation mechanism), but do not change the fatigue fracture mechanism of the alloy, and the higher loading frequency only accelerate the crack nucleation processes.

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Corrosion fatigue behavior of conversion coated AZ61 magnesium alloy

Materials Science and Engineering A ◽

10.1016/j.msea.2010.04.059 ◽

2010 ◽

Vol 527 (18-19) ◽

pp. 4978-4984 ◽

Cited By ~ 24

Author(s):

Md. Shahnewaz Bhuiyan ◽

Yuichi Ostuka ◽

Yoshiharu Mutoh ◽

Tsutomu Murai ◽

Shinpei Iwakami

Keyword(s):

Magnesium Alloy ◽

Corrosion Fatigue ◽

Fatigue Behavior ◽

Az61 Magnesium Alloy

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Influence of neodymium on high cycle fatigue behavior of die cast AZ91D magnesium alloy

Journal of Rare Earths ◽

10.1016/s1002-0721(09)60133-2 ◽

2010 ◽

Vol 28 (3) ◽

pp. 456-460 ◽

Cited By ~ 10

Author(s):

You YANG ◽

Xuesong LI

Keyword(s):

Magnesium Alloy ◽

High Cycle Fatigue ◽

Fatigue Behavior ◽

Cycle Fatigue ◽

Az91d Magnesium Alloy ◽

Die Cast

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The Effect of Inverse Macro-Segregation on Fatigue Behavior of Die-Cast AM60 Magnesium Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.488-489.713 ◽

2005 ◽

Vol 488-489 ◽

pp. 713-716 ◽

Cited By ~ 2

Author(s):

Soon Gi Lee ◽

Gautam R. Patel ◽

Arun M. Gokhale

Keyword(s):

Mechanical Properties ◽

High Pressure ◽

Magnesium Alloy ◽

Fatigue Resistance ◽

Surface Segregation ◽

Fatigue Behavior ◽

Eutectic Phase ◽

Mg Alloys ◽

Die Cast ◽

Alloy Castings

The normal and inverse solute macro-segregation are known to occur in Al and other nonferrous alloy castings and have been well studied and documented. However, these phenomena have not been investigated in the high-pressure die-cast Mg-alloys. Consequently, the effects of macro-segregation on the mechanical properties of cast Mg-alloys have not been characterized. The objective of this contribution is to investigate the effects of inverse macro-segregation and porosity on the fatigue behavior of high-pressure die-cast AM60 alloy. It is observed that the inverse macro-segregation of eutectic phase at the cast surfaces adversely affects the fatigue behavior: the fatigue resistance decreases substantially due to the presence of the surface segregation.

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