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Chin. Phys. B, 2009, Vol. 18(3): 1283-1286    DOI: 10.1088/1674-1056/18/3/074
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Fatigue life of metal treated by magnetic field

Liu Zhao-Long(刘兆龙), Hu Hai-Yun(胡海云), Fan Tian-You(范天佑), and Xing Xiu-San(邢修三)
Department of Physics, Beijing Institute of Technology, Beijing 100081, China
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.
Keywords:  fatigue life      non-equilibrium statistical theory      magnetic field  
Received:  08 July 2008      Revised:  01 August 2008      Accepted manuscript online: 
PACS:  62.20.M- (Structural failure of materials)  
  81.40.Np (Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure)  
  75.80.+q (Magnetomechanical effects, magnetostriction)  
  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  

Cite this article: 

Liu Zhao-Long(刘兆龙), Hu Hai-Yun(胡海云), Fan Tian-You(范天佑), and Xing Xiu-San(邢修三) Fatigue life of metal treated by magnetic field 2009 Chin. Phys. B 18 1283

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