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
Fatigue limit , Fatigue notch sensitivity , Ultra-fine grained steel
Journal title
Astroparticle Physics
Record number
2067708
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