Fatigue Crack Propagation Behavior Relevant to Microstructural Inhomogeneity in A Friction Stir Weldment

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概要

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• The behavior of fatigue cracks which propagated at some representative areas in the friction stir welded joint of aluminum alloy, AA6063-T5, was studied at both room temperature (RT) and 200°C. The experimental results showed that the fatigue crack propagation (FCP) rates were significantly different depending on the crack propagating area. The test temperature also affected the FCP rates remarkably. In all cases, the FCP rates in the weldment were higher than those in the parent metal. The difference could not be reasonably interpreted only from mechanical point of view in which the crack closure behavior was taken into account. Furthermore, the non-uniform distribution of hardness had insignificant effect on FCP rates. This study found that the microstructural inhomogeneity played more essential role in FCP behavior of FSW.

著者

• Okazaki Masakazu

  Nagaoka Univ. Of Technol. Niigata Jpn

• SAKAGUCHI Motoki

  Nagaoka Univercity of technology, Department of Mechanical Engineering

• TRA Tran

  Nagaoka University of Technology

• SAKAGUCHI Motoki

  Nagaoka University of Technology

• SEINO Masahiro

  Nikkei Niigata Co.

関連論文

• Fatigue Crack Propagation Behavior Relevant to Microstructural Inhomogeneity in A Friction Stir Weldment
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• Fatigue properties of alloy 718 overlay-coated with a Co-based X40 alloy by the Micro Spark Coating
• Preface

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