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The effect of artificial defects on the fatigue characteristics of AISI 4340 steel |
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| รหัสดีโอไอ | |
| Creator | Yaakov B. UNIGOVSKI |
| Title | The effect of artificial defects on the fatigue characteristics of AISI 4340 steel |
| Contributor | Dmitry FISHMAN, Liat FISHMAN, Liron SHICHMAN, Ofir MOSHE, Roni Z. SHNECK, Emmanuel M. GUTMAN |
| Publisher | Metallurgy and Materials Science Research Institute Chulalongkorn University |
| Publication Year | 2564 |
| Journal Title | Journal of Metals, Materials and Minerals |
| Journal Vol. | 31 |
| Journal No. | 3 |
| Page no. | 53-62 |
| Keyword | Low alloy steel, High cyclic fatigue, Surface roughness, Artificial defects, Shot peening |
| ISSN | 0857-6149 |
| Abstract | This study examined the fatigue life (Nf) and fatigue limit (FL) of AISI 4340 steel in relation to surface roughness, artificial defects and shot peening. Artificial surface defects on fatigue specimens were obtained by electrical discharge machining (EDM) or by pre-corrosion in 3.5% NaCl and perchloric acid solutions, followed by a fatigue test. The presence of artificial defects of various sizes, taken into account by the parameter, led to a significant decrease in fatigue characteristics, while shot peening contributed to their noticeable improvement. Defects resulting from electrochemical corrosion had a much greater negative effect on fatigue life than defects introduced by EDM. |
