Influence of long-term heating on the fatigue properties of low-alloyed cast steel STN 42 2707

Production Engineering Archives

František Nový¹  Otakar Bokůvka¹  Michal Jambor¹  Ján Lago¹  Libor Trško¹ 

[1] University of Žilina;

关键词: cast steel STN 42 2707;    long-term heating;    fatigue properties;    Kath;    da/dN = f(Ka);   

DOI  :  

来源: DOAJ

【 摘 要 】

In this paper the authors publish own experimental results of examination of low-alloyed cast steel STN 42 2707 fatigue properties (near- threshold regime of fatigue crack propagation for rates from da/dN =5.6x10-9m.cycle-1to da/dN =10-12 m.cycle-1 and Kath at da/dN =10-12 m.cycle-1) initial state and after long-term heating (T = 400 °C, t = 4000 hours ≈ 167 days) obtained at high-frequency loading (f ≈ 20 kHz, T = 20 ± 5 °C, R = -1). The long-term heating of material caused decrease of Kath and increase of fatigue crack growth rate in the near-threshold regime; then worse of low-alloyed cast steel STN 42 2707 fatigue properties.

【 授权许可】

Unknown