Effect of graphite degradation on the LCF properties of nodular cast iron

被引：0
|
作者：
Denk, Josef [1 ]
机构：
[1] ABB Turbo Syst, Dev Dept ZTE, CH-5401 Baden, Switzerland
来源：
FDMD II - JIP 2014 - FATIGUE DESIGN & MATERIAL DEFECTS | 2014年 / 12卷
关键词：
D O I：
10.1051/matecconf/20141204001
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effect of degraded microstructure on the tensile and LCF properties was studied on a casing of a turbocharger, which exhibited locally irregular graphite formation. The tensile tests showed that the ductility values of the zone with degraded graphite decreased strongly compared to the zone with normal graphite, while the strength values decreased only slightly. Based on these results and a LCF reference curve for nodular cast iron with normal graphite structure, a synthetic LCF curve was generated for the material condition with degraded graphite structure. LCF tests on specimens with irregular graphite structure confirmed the predicted LCF behaviour quite good.
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