Surface Rolling Effect on Effective Short Fatigue Cracks Density for Railway LZ50 Axle Steel

Bing Yang; Yong Xiang Zhao

doi:10.4028/www.scientific.net/AMR.118-120.75

Paper Titles

Experimental Observations of Dominant Effective Short Fatigue Crack Behavior for Railway LZ50 Axle Steel
p.54

Scale-Induced Effects on Fatigue Properties of the Cast Steel for Chinese Railway Rolling Wagon Bogie Frames
p.59

Bending Ratcheting Tests of Z2CND18.12 Stainless Steel
p.65

Deformation Analysis for Welding Assembly Processes of Automobile Panels
p.70

Surface Rolling Effect on Effective Short Fatigue Cracks Density for Railway LZ50 Axle Steel
p.75

Damage Modes and Strength Reliability Strategies of Railway Wheel Set
p.80

Mechanical and Physical Characters of the Cast Steel for Chinese Railway Rolling Wagon Bogie Frames
p.90

Cyclic Deformation Characters and Description of the Cast Steel for Chinese Railway Rolling Wagon Bogie Frames
p.95

Measurement on Fracture Roughness Values of the Cast Steel for Chinese Railway Rolling Wagon Bogie Frames
p.100

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 118-120Surface Rolling Effect on Effective Short Fatigue...

Surface Rolling Effect on Effective Short Fatigue Cracks Density for Railway LZ50 Axle Steel

Abstract:

Surface rolling effect on effective short fatigue cracks density, which reflect the affecting capacity on the initiation firstly and then growth of the dominant short crack result finally in specimen failure, is experimentally studied by a replica technique. Two groups of smooth hourglass shaped specimens of LZ50 axle steel with/without rolled surfaces were tested. The crack density of surface rolled specimens was much lower than that of the other group. This indicates surface rolling technology having the effect of hardening surface layer material to introduce compressive residual stresses. The effect appears to restrain the short crack nucleation and propagation and then, to extend the fatigue life.

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Periodical:

Advanced Materials Research (Volumes 118-120)

Pages:

75-79

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.118-120.75

Citation:

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Online since:

June 2010

Authors:

Bing Yang, Yong Xiang Zhao

Keywords:

Density, Fatigue, LZ50 Steel, Short Crack

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