Experimental Research on Crack Propagation in U71Mn and U75V Rail Steels

Jing Jing Li; Ya Fang Guo; Yue Sheng Wang; Chang Hai Tian

doi:10.4028/www.scientific.net/KEM.324-325.807

Paper Titles

Initiation and Crack Propagation in Complex Structures Considering Total Value of Loading
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Interface Shear Strength of Carbon Fiber Mesh (CFM) Attached to RC Surface for External Reinforcing
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Computation of Effective Fatigue Thresholds Based on a New Concept of Crack Closure
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Experimental Research on Crack Propagation in U71Mn and U75V Rail Steels
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Fatigue Life Estimating Method for Multiple-Site Structure
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Plastic Deformation of Rivet in Cylindrical Structure
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Fatigue Life Evaluation of Bolt Having Tightening Torque under Random Loading
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Unified Solution of Expansion of Cylindrical Cavity of Elastic-Brittle-Plastic Strain-Softening Materials with Different Elastic Modulus in Tensile and Compression
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 324-325Experimental Research on Crack Propagation in...

Experimental Research on Crack Propagation in U71Mn and U75V Rail Steels

Abstract:

In this paper, the continuous in-situ observations of the fatigue crack growth in U71Mn and U75V rail steel are made by using the scanning electronic microscope (SEM). The microstructure patterns of cracks under the mode I fatigue loads and quasi-static loads are presented. The results indicate that the short fatigue crack growth in rail steel is a quasi-cleavage fracture. The ductility and the performance of fatigue resistance of U71Mn rail steel are better than those of U75V rail steel.

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Periodical:

Key Engineering Materials (Volumes 324-325)

Pages:

807-810

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.324-325.807

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Online since:

November 2006

Authors:

Jing Jing Li, Ya Fang Guo, Yue Sheng Wang, Chang Hai Tian

Keywords:

Fatigue Fracture, Rail Steels, Scanning Electron Microscope (SEM), Short Crack

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References

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