Role of defects in fatigue damage mechanisms of cast polycrystalline superalloy MAR-M 247

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F14%3A00434596" target="_blank" >RIV/68081723:_____/14:00434596 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/matecconf/20141203005" target="_blank" >http://dx.doi.org/10.1051/matecconf/20141203005</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/matecconf/20141203005" target="_blank" >10.1051/matecconf/20141203005</a>

Result language
angličtina
Original language name
Role of defects in fatigue damage mechanisms of cast polycrystalline superalloy MAR-M 247
Original language description
High-cycle fatigue life of nickel-based superalloy MAR-M 247 was experimentally determined for as-cast material and material processed by hot isostatic pressing (HIP). Fatigue testing was conducted at temperatures 650, 800, 900 C in laboratory air. HIP was done at the following conditions: 1200 C/100 MPa/240 min. It has been found that HIP significantly improves the fatigue life. Obtained results indicate that main factors which determine the fatigue strength of material in both conditions are grain size, grain orientation and size and distribution of casting defects. The distribution and size of the casting defects were evaluated by light microscopy on metallographic sections. The data were processed by the extreme value statistics, which enables to estimate the maximum size of a defect likely to occur in a defined volume. Light and scanning electron microscopy were used for fractographic investigation of fracture surfaces and fatigue crack initiation sites. Focused ion beam technique
Czech name
—
Czech description
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Project
<a href="/en/project/FR-TI4%2F030" target="_blank" >FR-TI4/030: Research and development of mechanical properties for new types of nickel-based superalloy castings developed by technologies investment precision casting method</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Fatigue Design and Material Defects, FDMD II - JIP2014
ISBN
978-2-7598-1274-5
ISSN
2261-236X
e-ISSN
—
Number of pages
3
Pages from-to
"Art. n. 03005"
Publisher name
EDP Sciences
Place of publication
Paris
Event location
Paris
Event date
Jun 11, 2014
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—

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