Fatigue crack growth rate in ultra-fine grain steel SS400 and its welded joint - 文章详情页

作者：

Hou, Z.-B. (Hou, Z.-B..) | Shi, Y.-W. (Shi, Y.-W..) | Tian, Z.-L. (Tian, Z.-L..)

收录：

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摘要：

SS400　is　a　new　generation　steel　with　ultra-fine　grain　strengthening.　The　effect　of　welding　process　on　the　fatigue　performance　is　concerned　recently.　The　fatigue　crack　growth　rate　has　been　investigated　for　SS400　and　its　welded　joint　based　on　the　ASTM　E647-83　specification.　In　the　test　the　compact　tension　(CT)　specimens　were　used.　It　is　found　that　there　exist　two　stages　with　different　fatigue　crack　growth　rate　for　the　test　steel.　In　addition　both　the　fatigue　crack　growth　rates　in　the　weld　metal　and　heat　affected　zone　(HAZ)　are　lower　than　that　in　the　base　metal.　The　fatigue　crack　growth　rate　of　the　HAZ　is　between　that　of　the　weld　metal　and　base　metal.　It　is　clear　that　the　change　of　microstructure　and　properties　in　welded　joint　does　not　degrade　the　fatigue　performance　of　the　ultra-fine　grained　steel.

关键词：

Fatigue crack growth; New generation steel; SS400

作者机构：

[ 1 ] [Hou, Z.-B.]Beijing University of Technology, Beijing 100022, China
[ 2 ] [Shi, Y.-W.]Beijing University of Technology, Beijing 100022, China
[ 3 ] [Tian, Z.-L.]Ctrl. Iron/Steel Research Institute, Beijing 100081, China

通讯作者信息：

[Hou, Z.-B.]Beijing University of Technology, Beijing 100022, China

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