Initiation of fatigue cracks and lifetime of Ni-base superalloys at high mean stress and temperature

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00483642" target="_blank" >RIV/68081723:_____/17:00483642 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.prostr.2017.11.059" target="_blank" >http://dx.doi.org/10.1016/j.prostr.2017.11.059</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.prostr.2017.11.059" target="_blank" >10.1016/j.prostr.2017.11.059</a>

Result language
angličtina
Original language name
Initiation of fatigue cracks and lifetime of Ni-base superalloys at high mean stress and temperature
Original language description
The effect of high-frequency cycling (120 Hz) superimposed on high tensile mean stress on a lifetime of cast Ni-base superalloys IN 713LC at 800 °C and MAR-M 247 at 900 °C was investigated. It has been found that both the alloys exhibit qualitatively similar behavior in creep/fatigue loading conditions. Superposition of small stress amplitudes on the tensile mean stress does not influence the time to fracture until the stress amplitude reaches a threshold value, which is dependent on the mean stress. The higher the mean stress the higher is the stress amplitude threshold value. The observed creep/fatigue behavior is governed by two mechanisms: (a) formation and growth of intergranular cracks by creep mechanism (b) initiation and growth of fatigue cracks from the intergranular creep cracks. The casting defects do not play any important role as regards the lifetime under investigated loading conditions.
Czech name
—
Czech description
—

Project
<a href="/en/project/EG15_019%2F0004399" target="_blank" >EG15_019/0004399: Research and development of precision casting technology for new type of aircraft engine castings and axial turbocharger wheels</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
3RD INTERNATIONAL SYMPOSIUM ON FATIGUE DESIGN AND MATERIAL DEFECTS (FDMD 2017)
ISBN
—
ISSN
2452-3216
e-ISSN
—
Number of pages
6
Pages from-to
44-49
Publisher name
Elsevier
Place of publication
Amsterdam
Event location
Lecco
Event date
Sep 19, 2017
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000452909100007

Similar results(10)