Fatigue Lives and Crack Propagation Behavior of the Extruded Magnesium Alloy Processed under Various Extrusion Conditions

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概要

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• The fatigue properties of extruded magnesium alloy AZ31 were evaluated using material processed under two different extrusion ratios and two different extrusion temperatures. The effect of the extrusion ratios and extrusion temperatures on the fatigue lives and crack propagation behavior is discussed. The fatigue crack initiation and propagation processes were observed by the replica method. It was found that cracks initiated early in the fatigue process, and therefore the total fatigue life can be approximated as the crack propagation life. The crack propagation behavior observed in those materials was analyzed using a modified linear elastic fracture mechanics parameter, M. The relation crack propagation rate vs. M parameter was found to be useful in predicting fatigue lives and crack propagation curves.

• 一般社団法人 日本機械学会の論文

著者

• SATO Masanori

  Dept. Earth & Environmental Sciences, Fac. Sci., Kagoshima Univ.

• SHIMIZU Masayoshi

  Dept. of Mechanical Engineering, University of Toyama

• SHIBATA Hiroshi

  Toyama National college of Maritime Technology

• ISHIHARA Sotomi

  Dept. of Mechanical Engineering, University of Toyama

• GOSHIMA Takahito

  Dept. of Mechanical Engineering, University of Toyama

• MCEVILY Arthur

  Institute of Materials Science, University of Connecticut

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