Fatigue crack growth behaviour of an alternative single crystal nickel base superalloy

Palmert, FransLinköpings universitet,Konstruktionsmaterial,Tekniska fakulteten,Siemens Ind Turbomachinery AB, Sweden (författare)

Funding Agencies|Siemens Industrial Turbomachinery AB in Finspang, Sweden; Swedish Energy Agency, via the Research Consortium of Materials Technology for Thermal Energy Processes [KME-702]
The fatigue crack growth behaviour of a single crystal nickel base superalloy was studied at three different temperatures (20 degrees C, 500 degrees C and 750 degrees C) and three different crystallographic orientations. At the highest testing temperature, the influence of hold time at maximum load was also evaluated. Under some of the testing conditions, crystallographic crack growth occurred along {1 1 1} planes, which were non-perpendicular to the loading direction. The propensity for crystallographic cracking was observed to be strongly temperature dependent with a maximum occurring at the intermediate testing temperature of 500 degrees C. During non-crystallographic, Mode I crack growth the crack tended to avoid the gamma particles and propagated preferentially through the gamma matrix.

TEKNIK OCH TEKNOLOGIER Maskinteknik Teknisk mekanik hsv//swe
ENGINEERING AND TECHNOLOGY Mechanical Engineering Applied Mechanics hsv//eng
Single crystal superalloy; Fatigue; Crack growth; Crystallographic crack growth; Temperature dependence; Orientation dependence; Hold time influence

Moverare, JohanLinköpings universitet,Konstruktionsmaterial,Tekniska fakulteten(Swepub:liu)johmo31 (författare)
Gustafsson, DavidSiemens Ind Turbomachinery AB, Sweden (författare)
Busse, ChristianLinköpings universitet,Mekanik och hållfasthetslära,Tekniska fakulteten(Swepub:liu)chrbu94 (författare)
Linköpings universitetKonstruktionsmaterial (creator_code:org_t)

Ingår i:International Journal of Fatigue: ELSEVIER SCI LTD109, s. 166-1810142-11231879-3452

Av författaren/redakt...: Palmert, Frans; Moverare, Johan; Gustafsson, Davi ...; Busse, Christian

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Maskinteknik; och Teknisk mekanik

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