Areal fatigue strength assessment of cast aluminium surface layers
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In: International Journal of Fatigue, Vol. 133.2020, No. April, 105423, 20.12.2019.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Areal fatigue strength assessment of cast aluminium surface layers
AU - Pomberger, Sebastian
AU - Stoschka, Michael
AU - Aigner, Roman
AU - Leitner, Martin
AU - Ehart, Robert
PY - 2019/12/20
Y1 - 2019/12/20
N2 - The fatigue strength of cast aluminium surface layers is significantly affected by casting imperfections. Experimental work reveals crack initiation due to three failure modes; microporosity, cast surface texture as well as a combination of both. A novel local sub-area evaluation of notch factors for surface texture characterisation utilises areal surface texture by pit depth values , ranging within several hundred microns, and related notch root radii distributions. Additionally, the cast bulk strength is calculated by Murakami’s approach. For all three failure cases, the presented holistic fatigue layer strength assessment methodology is well applicable for sand cast aluminium.
AB - The fatigue strength of cast aluminium surface layers is significantly affected by casting imperfections. Experimental work reveals crack initiation due to three failure modes; microporosity, cast surface texture as well as a combination of both. A novel local sub-area evaluation of notch factors for surface texture characterisation utilises areal surface texture by pit depth values , ranging within several hundred microns, and related notch root radii distributions. Additionally, the cast bulk strength is calculated by Murakami’s approach. For all three failure cases, the presented holistic fatigue layer strength assessment methodology is well applicable for sand cast aluminium.
KW - Areal roughness parameter
KW - Cast aluminium surface layer
KW - Fatigue strength
KW - Porosity
KW - Sub-area analysis
UR - http://www.scopus.com/inward/record.url?scp=85077073063&partnerID=8YFLogxK
U2 - 10.1016/j.ijfatigue.2019.105423
DO - 10.1016/j.ijfatigue.2019.105423
M3 - Article
AN - SCOPUS:85077073063
VL - 133.2020
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
IS - April
M1 - 105423
ER -
