Effect of the Depth of Decarburized Layer in SKL15 Tension Clamp on Fatigue Strength
The surface of a quenched and tempered spring steel may have a decarburized layer from which the carbon component has been reduced. The fatigue strength of the decarburized layer is low compared to the base metal, which can easily develop fatigue cracks. Recently, fatigue failure was reported in the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/9/3841 |
| _version_ | 1797536491783585792 |
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| author | Yeun-Chul Park Chang-Beom An Mancheol Kim Hyoung-Bo Sim |
| author_facet | Yeun-Chul Park Chang-Beom An Mancheol Kim Hyoung-Bo Sim |
| author_sort | Yeun-Chul Park |
| collection | DOAJ |
| description | The surface of a quenched and tempered spring steel may have a decarburized layer from which the carbon component has been reduced. The fatigue strength of the decarburized layer is low compared to the base metal, which can easily develop fatigue cracks. Recently, fatigue failure was reported in the tension clamp (SKL 15) of the DFF-300 rail fastening system during use on one urban transit route in South Korea. As a result of measuring the depth of the decarburized layer of the SKL 15 tension clamp where the fatigue failure occurred, a decarburized layer thinner than the manufacturer’s maximum allowable decarburized layer was found in one of the eight tension clamps. To check the depth of the decarburized layer where the fatigue crack may have initiated, the decarburized layer was assumed to be the initial crack, and fatigue crack initiation was assessed based on the linear elastic fracture mechanics. The manufacturer’s maximum allowable decarburized layer depth of 0.2 mm may result in fatigue cracks. |
| first_indexed | 2024-03-10T12:01:28Z |
| format | Article |
| id | doaj.art-0888c4d86ef9422086536f077592796c |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T12:01:28Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-0888c4d86ef9422086536f077592796c2023-11-21T16:54:34ZengMDPI AGApplied Sciences2076-34172021-04-01119384110.3390/app11093841Effect of the Depth of Decarburized Layer in SKL15 Tension Clamp on Fatigue StrengthYeun-Chul Park0Chang-Beom An1Mancheol Kim2Hyoung-Bo Sim3Department of Civil and Environmental Engineering, Hannam University, Daejeon 34430, KoreaCivil Engineering Planning Team, Incheon International Airport Corporation, Incheon 22382, KoreaKorea Railroad Research Institute, Uiwang 16105, KoreaDepartment of Civil and Environmental Engineering, Incheon National University, Incheon 22012, KoreaThe surface of a quenched and tempered spring steel may have a decarburized layer from which the carbon component has been reduced. The fatigue strength of the decarburized layer is low compared to the base metal, which can easily develop fatigue cracks. Recently, fatigue failure was reported in the tension clamp (SKL 15) of the DFF-300 rail fastening system during use on one urban transit route in South Korea. As a result of measuring the depth of the decarburized layer of the SKL 15 tension clamp where the fatigue failure occurred, a decarburized layer thinner than the manufacturer’s maximum allowable decarburized layer was found in one of the eight tension clamps. To check the depth of the decarburized layer where the fatigue crack may have initiated, the decarburized layer was assumed to be the initial crack, and fatigue crack initiation was assessed based on the linear elastic fracture mechanics. The manufacturer’s maximum allowable decarburized layer depth of 0.2 mm may result in fatigue cracks.https://www.mdpi.com/2076-3417/11/9/3841fatiguedecarburized layertension clampquenched and tempered steelrail fastening system |
| spellingShingle | Yeun-Chul Park Chang-Beom An Mancheol Kim Hyoung-Bo Sim Effect of the Depth of Decarburized Layer in SKL15 Tension Clamp on Fatigue Strength Applied Sciences fatigue decarburized layer tension clamp quenched and tempered steel rail fastening system |
| title | Effect of the Depth of Decarburized Layer in SKL15 Tension Clamp on Fatigue Strength |
| title_full | Effect of the Depth of Decarburized Layer in SKL15 Tension Clamp on Fatigue Strength |
| title_fullStr | Effect of the Depth of Decarburized Layer in SKL15 Tension Clamp on Fatigue Strength |
| title_full_unstemmed | Effect of the Depth of Decarburized Layer in SKL15 Tension Clamp on Fatigue Strength |
| title_short | Effect of the Depth of Decarburized Layer in SKL15 Tension Clamp on Fatigue Strength |
| title_sort | effect of the depth of decarburized layer in skl15 tension clamp on fatigue strength |
| topic | fatigue decarburized layer tension clamp quenched and tempered steel rail fastening system |
| url | https://www.mdpi.com/2076-3417/11/9/3841 |
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