Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Angelika Brueckner-Foit"'
Autor:
Fatih Buelbuel, Angelika Brueckner-Foit, Marcel Wicke, Martina Zimmermann, Tina Kirsten, Hans-Juergen Christ
Publikováno v:
International Journal of Fatigue. 119:102-111
The crack extension behavior of long cracks in the near-threshold regime is analyzed at R = 0.1 using flat dog-bone specimens of a commercial aluminum alloy in peak-aged and overaged condition. Once a pre-crack had been introduced by cyclic compressi
Publikováno v:
Procedia Structural Integrity. 23:33-38
Secondary recycled Al alloys are in the focus of industry because they possess a tremendous potential for cost and energy savings. However, they are inevitably contaminated with a certain amount of iron from which several variants of brittle intermet
Autor:
F. Zeismann, Martin Fehlbier, D. Juengst, I. Bacaicoa, A. Schilling, J. Glueck, Angelika Brueckner-Foit
Publikováno v:
Results in Materials, Vol 8, Iss, Pp 100135-(2020)
The effect of carbon and SiC addition in combination with heat treatment on the mechnanical properties of a commercial AZ91 alloy was studied in this work. Different additions of carbon and SiC were considered for the as-cast and heat-treated conditi
Publikováno v:
International Journal of Fatigue. 116:562-571
The effect of shrinkage pores and gas pores on the fatigue process of a secondary Al-Si-Cu-Fe alloy was analyzed by micro-computed tomography and scanning electron microscopy. Repeated CT-scans were performed in order to study the damage accumulation
Autor:
A. Geisert, Martin Fehlbier, I. Bacaicoa, F. Zeismann, M. Luetje, Marcel Wicke, Angelika Brueckner-Foit
Publikováno v:
Engineering Fracture Mechanics. 183:159-169
The casting defects from a Fe-rich Al-Si-Cu alloy were characterized by micro tomography and Finite Element Analysis. The specimens were analyzed in a high resolution computed-tomography scan and the 3D geometry of the casting defects were segmented
Publikováno v:
International Journal of Fatigue. 103:363-370
Specimens of an Al-Cu-Si alloy were manufactured using die casting without additional machining. These specimens contained various kinds of natural defects were subjected to fatigue loading. The role of these defects was analyzed using fractography,
Autor:
Fatih Buelbuel, Marcel Wicke, Hans-Juergen Christ, Tina Kirsten, Martina Zimmermann, Angelika Brueckner-Foit
Publikováno v:
Procedia Structural Integrity. 7:235-241
Short cracks initiated from pre-existing flaws are known to propagate in an intermittent way below threshold as the crack tip field interacts with the microstructure. If the stress amplitude is very low, similar effects as observed for short cracks m
Publikováno v:
Procedia Structural Integrity. 7:36-43
The effect of different types of defects on the fatigue properties of a secondary Al-Si-Cu-Fe alloy was analyzed by micro-computed tomography and scanning electron microscopy. It was found that extended pores typically occurring at unfavourable cooli
Autor:
Marcel Wicke, Angelika Brueckner-Foit
Publikováno v:
MATEC Web of Conferences, Vol 300, p 11004 (2019)
Carefully performed experiments with long cracks in the near-threshold regime have shown that the crack tip field of these cracks significantly deviate from the expected mode-I butterfly-shaped ones and resemble strongly to mixed-mode crack tip field
Publikováno v:
Solid State Phenomena. 258:495-500
The crack tip field of small fatigue cracks was measured using digital image correlation DIC. For this purpose, smooth specimen were fatigued until a certain amount of damage was visible on the surface. This specimens were then placed in a micro-tens