Very-High-Cycle Fatigue and Charpy Impact Characteristics of Manganese Steel for Railway Axle at Low Temperatures
| Autor: | In-Sik Cho, Byeong-Choon Goo, Hyung-Suk Mun |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
microstructure Charpy impact test chemistry.chemical_element 02 engineering and technology Manganese low temperature lcsh:Technology lcsh:Chemistry Brittleness 0203 mechanical engineering General Materials Science ultrasonic fatigue test Instrumentation lcsh:QH301-705.5 Fluid Flow and Transfer Processes lcsh:T Process Chemistry and Technology Metallurgy General Engineering Fatigue testing 020302 automobile design & engineering Atmospheric temperature range Microstructure Fatigue limit very-high-cycle fatigue lcsh:QC1-999 Computer Science Applications Axle 020303 mechanical engineering & transports chemistry lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 manganese steel railway axle lcsh:Engineering (General). Civil engineering (General) lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 10, Iss 5042, p 5042 (2020) Applied Sciences Volume 10 Issue 15 |
| ISSN: | 2076-3417 |
| Popis: | Railway vehicles are being exposed with increasing frequency to conditions of severe heat and cold because of changes in the climate. Trains departing from Asia travel to Europe through the Eurasian continent and vice versa. Given these circumstances, the mechanical properties and performance of vehicle components must therefore be evaluated at lower and higher temperatures than those in current standards. In this study, specimens were produced from a commercial freight train axle made of manganese steel and subjected to high-cycle fatigue tests at &minus 60, &minus 30, and 20 ° C. The tests were conducted using an ultrasonic fatigue tester developed to study fatigue at low temperatures. Charpy impact testing was performed over the temperature range of &minus 60 to 60 ° C to measure the impact absorption energy of the axle material. The material showed a fatigue limit above 2 million cycles at each temperature the lower the test temperature, the greater the fatigue limit cycles. The impact absorption energy at &minus 60 ° C was 81% less compared to the value at 20 ° C. The axle material became completely brittle in the temperature range of &minus 30 to &minus 40 ° C. |
| Databáze: | OpenAIRE |
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