中国物理B ›› 2009, Vol. 18 ›› Issue (3): 1283-1286.doi: 10.1088/1674-1056/18/3/074

• 8000 CROSSDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Fatigue life of metal treated by magnetic field

刘兆龙, 胡海云, 范天佑, 邢修三   

  1. Department of Physics, Beijing Institute of Technology, Beijing 100081, China
  • 收稿日期:2008-07-08 修回日期:2008-08-01 出版日期:2009-03-20 发布日期:2009-03-20

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)   

  1. Department of Physics, Beijing Institute of Technology, Beijing 100081, China
  • Received:2008-07-08 Revised:2008-08-01 Online:2009-03-20 Published:2009-03-20

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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.

Key words: fatigue life, non-equilibrium statistical theory, magnetic field

中图分类号:  (Structural failure of materials)

  • 62.20.M-
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)