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Thermal softening of fine pearlitic steel and its effect on the fatigue behaviour

Krste Cvetkovski (Institutionen för material- och tillverkningsteknik, Materialteknologi) ; Johan Ahlström (Institutionen för material- och tillverkningsteknik, Materialteknologi) ; Birger Karlsson (Institutionen för material- och tillverkningsteknik, Materialteknologi)
Procedia Engineering: 10th International Fatigue Congress, FATIGUE 2010; Prague; Czech Republic; 6 June 2010 through 11 June 2010 (1877-7058). Vol. 2 (2010), 1, p. 541-545.
[Konferensbidrag, refereegranskat]

Associated with the durability of railway wheelsets, thermal damage was studied for two different steels in the temperature range 500 °C to 725 °C. Softening caused by cementite spheroidisation in the pearlitic materials leads to changes in the mechanical behaviour. It was found that higher contents of silicon and manganese leads to better resistance to softening. Correspondingly, softening leads to loss in fatigue life times at given stress amplitudes as read out from Wöhler curves. However the higher alloyed steel looses much less in fatigue life time than the less alloyed steel.

Nyckelord: Fatigue; Spheroidization; Damage; Railway



Denna post skapades 2010-06-14. Senast ändrad 2016-08-17.
CPL Pubid: 122748

 

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Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Materialteknologi

Ämnesområden

Materialteknik

Chalmers infrastruktur