Fatigue life of metal treated by magnetic field |
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Authors: | Liu Zhao-Long Hu Hai-Yun Fan Tian-You and Xing Xiu-San |
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Institution: | Department of Physics, Beijing Institute of Technology, Beijing 100081, China |
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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. |
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Keywords: | fatigue life non-equilibrium
statistical theory magnetic field |
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