Effect of Load Ratio on Fatigue Failure Micromechanisms of Railway Axle Steel
| Parent link: | Applied Mechanics and Materials: Scientific Journal Vol. 770 : Urgent Problems of Up-to-Date Mechanical Engineering.— 2015.— [P. 209-215] |
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| Sažetak: | Title screen The paper presents the basic regularities of fatigue failure of the railway wheelset axle material – OsL steel (C - 0,40-0,48 %; Mn - 0,55-0,85 %; Si - 0,15-0,35 %; P < 0,04%; S < 0,045 %; Cr < 0,3 %; Ni < 0,3 %; Cu < 0,25 %). It was revealed that under loading stress ratio R=0, fatigue crack growth is 2 ... 4 times lower than that at the asymmetry R=-1. In doing so, amplitude of stress intensity factor vary in the range of 20–35 MPa√m. The micromechanisms of fatigue crack growth are described and systematized, while physical-mechanical interpretations of the relief morphology at different stages of its growth are offered. Режим доступа: по договору с организацией-держателем ресурса |
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2015
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| Serija: | Materials Science in Mechanical Engineering |
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| Online pristup: | http://dx.doi.org/10.4028/www.scientific.net/AMM.770.209 |
| Format: | Elektronički Poglavlje knjige |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=643360 |
| Sažetak: | Title screen The paper presents the basic regularities of fatigue failure of the railway wheelset axle material – OsL steel (C - 0,40-0,48 %; Mn - 0,55-0,85 %; Si - 0,15-0,35 %; P < 0,04%; S < 0,045 %; Cr < 0,3 %; Ni < 0,3 %; Cu < 0,25 %). It was revealed that under loading stress ratio R=0, fatigue crack growth is 2 ... 4 times lower than that at the asymmetry R=-1. In doing so, amplitude of stress intensity factor vary in the range of 20–35 MPa√m. The micromechanisms of fatigue crack growth are described and systematized, while physical-mechanical interpretations of the relief morphology at different stages of its growth are offered. Режим доступа: по договору с организацией-держателем ресурса |
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| Digitalni identifikator objekta: | 10.4028/www.scientific.net/AMM.770.209 |