Effect of Plastic Deformation on Torsional Fatigue Properties of a Low Carbon Steel |
| Journal |
Key Engineering Materials (Volumes 324 - 325) |
| Volume |
Fracture and Damage Mechanics V |
| Edited by |
M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz |
| Pages |
63-68 |
| DOI |
10.4028/www.scientific.net/KEM.324-325.63 |
| Online since |
November, 2006 |
| Authors |
Shinichi Nishida,
Nobusuke Hattori,
Cong Ling Zhou,
Akihiro Uchisako
|
| Keywords |
Fatigue Strength, FEM Analysis, Notched Specimen, Plastic Deformation, Residual Stress, Structural Steel, Surface Treatment, Torsional Fatigue, Work Hardening |
| Abstract |
This paper is aimed to investigate the effect of roller working on the torsional fatigue
properties of a typical low carbon steel referring by the resutls of FEM analysis. Three types of
specimens had been prepared with plastic deformation value of 0, 0.5 and 1.0mm, respectively. The
main results obtained in this study are as follows: (1) The torsional fatigue strength of roller-worked
specimen with 1.0mm plastic deformation is increased more than twice of that of non-rollerworked
specimens. (2) Surface hardness of roller worked specimen is much higher than that of the
non-roller worked one, and compressed and elongated structure is formed at the notch bottom of the
specimen. (3) Crack length along the axial direction of roller worked specimens is longer than that
of the non-roller worked specimen, and plural cracks initiated and propagated in the roller worked
specimens. (4) The residual stress distribution at the specimen’s notch bottom was analysed using
FEM analysis and it is verified the same tendency as the experimental results. |
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