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Fatigue life of metal treated by magnetic field

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【作者】 刘兆龙胡海云范天佑邢修三

【Author】 Liu Zhao-Long,Hu Hai-Yun,Fan Tian-You,and Xing Xiu-San Department of Physics,Beijing Institute of Technology,Beijing 100081,China

【机构】 Department of Physics,Beijing Institute of Technology

【摘要】 This paper investigates theoretically the influence of magnetization on fatigue life by using non-equilibrium statistical theory of fatigue fracture for metals.The fatigue microcrack growth rate is obtained from the dynamic equation of microcrack growth,where the influence of magnetization is described by an additional term in the potential energy of microcrack.The statistical value of fatigue life of metal under magnetic field is derived,which is expressed in terms of magnetic field and macrophysical as well as microphysical quantities.The fatigue life of AISI 4140 steel in static magnetic field from this theory is basically consistent with the experimental data.

【Abstract】 This paper investigates theoretically the influence of magnetization on fatigue life by using non-equilibrium statistical theory of fatigue fracture for metals.The fatigue microcrack growth rate is obtained from the dynamic equation of microcrack growth,where the influence of magnetization is described by an additional term in the potential energy of microcrack.The statistical value of fatigue life of metal under magnetic field is derived,which is expressed in terms of magnetic field and macrophysical as well as microphysical quantities.The fatigue life of AISI 4140 steel in static magnetic field from this theory is basically consistent with the experimental data.

  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2009年03期
  • 【分类号】O346.2
  • 【被引频次】2
  • 【下载频次】30
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