The role of elevated temperature exposure on structural evolution and fatigue strength of eutectic AlSi12 alloys
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F16%3A00464558" target="_blank" >RIV/68081723:_____/16:00464558 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.ijfatigue.2015.05.007" target="_blank" >http://dx.doi.org/10.1016/j.ijfatigue.2015.05.007</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijfatigue.2015.05.007" target="_blank" >10.1016/j.ijfatigue.2015.05.007</a>
Alternative languages
Result language
angličtina
Original language name
The role of elevated temperature exposure on structural evolution and fatigue strength of eutectic AlSi12 alloys
Original language description
Pistons of internal combustion (IC) engines are typically subjected during operation to high cycle fatigue loading at elevated temperatures (up to 350 degrees C). The materials typically used for piston production are eutectic Al-Si alloys for their excellent fluidity and suitable mechanical properties. Results of a fatigue testing program of eutectic Al-Si alloys at room temperature and at elevated temperatures (250 degrees C, 300 degrees C and 350 degrees C) performed with the aim to support piston design and material optimization are reported in this paper. Specimens were extracted from piston crowns and tested in a rotating bending test machine. The fatigue strength at 10(7) cycles was quantified by a staircase approach.To investigate the strengthening mechanism based on the formation of precipitates (Guinier-Preston (GP) zones) during decomposition of a metastable supersaturated solid solution, a structural investigation of one of the alloys before and after fatigue testing at elevated temperatures was conducted. Metallography, color etching, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to elucidate the following aspects: (1) the structural features of the alloy (dendrites of a-phase, primary Si particle size and distribution, morphology and distribution of intermetallic phases); (2) the changes of the strengthening mechanism (GP zones) with elevated temperature exposure.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JL - Fatigue and fracture mechanics
OECD FORD branch
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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Fatigue
ISSN
0142-1123
e-ISSN
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Volume of the periodical
83
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
24-35
UT code for WoS article
000367111200004
EID of the result in the Scopus database
2-s2.0-84947125660