TMF Life Prediction of High Temperature Components Made of Cast Iron HiSiMo: Part I: Uniaxial Tests and Fatigue Life Model

Event
SAE 2014 World Congress & Exhibition
Authors Abstract
Content
HiSiMo cast irons are frequently used as material for high temperature components in engines as e.g. exhaust manifolds and turbo chargers. These components must withstand severe cyclic mechanical and thermal loads throughout their service life. The combination of thermal transients with mechanical load cycles results in a complex evolution of damage, leading to thermomechanical fatigue (TMF) of the material and, after a certain number of loading cycles, to failure of the component. In this paper (Part I), the low-cycle fatigue (LCF) and TMF properties of HiSiMo are investigated in uniaxial tests and the damage mechanisms are addressed. On the basis of the experimental results a fatigue life model is developed which is based on elastic, plastic and creep fracture mechanics results of short cracks, so that time and temperature dependent effects on damage are taken into account. The model can be used to estimate the fatigue life of components by means of finite-element calculations (Part II of the paper).
Meta TagsDetails
DOI
https://doi.org/10.4271/2014-01-0915
Pages
7
Citation
Dropps, S., von Hartrott, P., and Seifert, T., "TMF Life Prediction of High Temperature Components Made of Cast Iron HiSiMo: Part I: Uniaxial Tests and Fatigue Life Model," SAE Int. J. Mater. Manf. 7(2):439-445, 2014, https://doi.org/10.4271/2014-01-0915.
Additional Details
Publisher
Published
Apr 1, 2014
Product Code
2014-01-0915
Content Type
Journal Article
Language
English