Fatigue of nodular cast iron at high frequency loading

被引：6
|
作者：
Vasko, A. [1 ]
Hurtalova, L. [1 ]
Uhricik, M. [1 ]
Tillova, E. [1 ]
机构：
[1] Univ Zilina, Fac Mech Engn, Dept Mat Engn, Univ 8215-1, Zilina 01026, Slovakia
来源：
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK | 2016年 / 47卷 / 5-6期
关键词：
Nodular cast iron; fatigue tests; high frequency loading; synthetic melts; silicon carbide;
D O I：
10.1002/mawe.201600519
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 degrees C). High frequency fatigue tests were carried out with using of the ultrasonic fatigue testing device KAUP-ZU (frequency f approximate to 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.
引用
收藏
页码：436 / 443
页数：8
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