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Fatigue of nodular cast iron at high frequency loading
Author(s) -
Vaško A.,
Hurtalová L.,
Uhríčik M.,
Tillová E.
Publication year - 2016
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201600519
Subject(s) - ferrosilicon , microstructure , materials science , metallurgy , cast iron , carbide , silicon carbide , scrap , stress (linguistics) , induction furnace , composite material , cyclic stress , fatigue limit , silicon , alloy , linguistics , philosophy
The paper deals with the influence of charge composition on microstructure of nodular cast iron and its fatigue properties at high frequency loading. The basic charge of experimental melts was formed by a different ratio of pig iron and steel scrap. Chemical composition of individual melts was regulated alternatively by metallurgical silicon carbide (SiC) or ferrosilicon (FeSi) and carburizer. Fatigue tests were realised at high frequency sinusoidal cyclic push‐pull loading (stress ratio R = –1) at ambient temperature (T = 20 ± 5 °C). High frequency fatigue tests were carried out with using of the ultrasonic fatigue testing device KAUP‐ZU (frequency f ≈ 20 kHz). The results show differences in mechanical and fatigue properties, which are connected with the microstructure. SiC additive positively influences microstructure and consequently, mechanical and fatigue properties of nodular cast iron are improved.