Title of article
Fatigue strength of ultra-fine grained steels
Author/Authors
Chapetti، نويسنده , , M.D and Miyata، نويسنده , , H and Tagawa، نويسنده , , T and Miyata، نويسنده , , T and Fujioka، نويسنده , , M، نويسنده ,
Pages
6
From page
331
To page
336
Abstract
Fatigue strength of two ultra-fine grained steels (grain sizes 0.8 and 1 μm) was investigated. A coarse grained (grain size 12.5 μm) SM490 steel with a similar chemical composition was also analysed for comparison purpose. An important improvement on smooth fatigue strength was observed in ultra-fine grained steels and results obey the Hall-Petch relation usually observed between smooth fatigue limit and grain size. High fatigue notch sensitivity was observed and no improvement in fatigue limit of sharp notches is expected.
Keywords
Ultra-fine grained steel , Fatigue limit , Fatigue notch sensitivity
Journal title
Astroparticle Physics
Record number
2065695
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