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

  • 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) ofHiSiMo 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).‚Ķshow moreshow less

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Metadaten
Author:Philipp von Hartrott, Thomas SeifertGND, Steven Dropps
Creating Corporation:SAE International
Year of Publication:2014
Language:English
GND Keyword:Hochtemperatur; Maschinenelement; Stahl
Parent Title (English):SAE International
Volume:7
Issue:2
ISSN:1946-3979 (Print)
ISSN:1946-3987 (e-ISSN)
First Page:439
Last Page:445
Document Type:Conference Proceeding
Institutes:Hochschule Offenburg / Bibliografie
Acces Right:Zugriffsbeschränkt
Release Date:2018/02/16
Licence (German):License LogoEs gilt das UrhG
Note:
Konferenz: SAE International Journal of Materials & Manufacturing SAE 2014 World Congress & Exhibition
DOI:https://doi.org/10.4271/2014-01-0915