Multiaxial fatigue behavior of GH4169 superalloy under non-proportional loadings at high temperature - 文章详情页

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摘要：

Multiaxial　fatigue　behavior　of　superalloy　GH4169　was　investigated　by　using　the　thin　tubular　multiaxial　fatigue　specimens　under　proportional　and　non-proportional　loadings　at　high　temperature.　The　relationship　between　the　cyclic　stress　response　and　the　cyclic　number　was　studied　by　recording　the　experimental　data.　The　experimental　results　showed　that　the　fatigue　life　was　decreased　under　non-proportional　loading.　In　the　entire　fatigue　process,　the　torsional　stress　response　always　showed　the　cyclic　softening.　The　characteristics　of　cyclic　hardening　or　softening　for　tensional　stress　response　depended　on　the　strain　loading　paths　and　the　loading　parameters.　With　the　cyclic　number　increase,　the　creep　phenomenon　was　gradually　showed　under　multiaxial　loading　at　high　temperature.

关键词：

Superalloys Fatigue of materials Hardening Nickel alloys Torsional stress

作者机构：

[ 1 ] [Shang, De-Guang]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China
[ 2 ] [Sun, Guo-Qin]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China
[ 3 ] [Cai, Neng]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100022, China
[ 4 ] [Wang, Jian-Guo]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology, Beijing 100083, China
[ 5 ] [Wang, Lian-Qing]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology, Beijing 100083, China
[ 6 ] [Wang, Hong-Ying]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology, Beijing 100083, China

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shangdg@bjut.edu.cn

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