Microstructural aspects of crack nucleation during cyclic loading of AA7075-T651

Autor:	J. Nardiello, Hasso Weiland, S. Cheong, Stefan Zaefferer, J. Papazian, Dierk Raabe
Rok vydání:	2009
Předmět:	Materials science Scanning electron microscope Mechanical Engineering Nucleation chemistry.chemical_element Focused ion beam Matrix (mathematics) Crack closure chemistry Mechanics of Materials Aluminium Microscopy Forensic engineering Cyclic loading General Materials Science Composite material
Zdroj:	Engineering Fracture Mechanics. 76:709-714
ISSN:	0013-7944
Popis:	A series of fatigue test samples made of 7075-T651 aluminum were interrupted at various life fractions and the number of debonded, cracked particles and cracks in the metal matrix was determined quantitatively as a function of load cycles. It was found that only cracked constituent particles nucleate a matrix crack. The crystallography of one individual crack and its three-dimensional shape was determined by serial sectioning in a scanning electron microscope by applying focused ion beam (FIB) milling in combination with orientation imaging microscopy (OIM). The limited data suggest that the initial growth direction of a crack is influenced by the crystallographic orientation of the matrix into which the crack is growing.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ab5653d8fb822c70aa33efc8f5319de6 https://doi.org/10.1016/j.engfracmech.2008.11.012 Zobrazit plný text záznamu Full Text from ScienceDirect