Effect of Mn dispersoid on the fatigue crack propagation of Al-Zn-Mg alloys

Aging treatments and tensile tests were conducted to determine the effect of Mn dispersoids on the fatigue crack propagation behavior of Al-Zn-Mg alloys. Manganese dispersoids in the alloys were found to increase the tortuosity of the crack path and improve the fatigue crack propagation properties,...

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Veröffentlicht in:	Metallurgical Transactions, A A, 1996-02, Vol.27 (2), p.490-493
Hauptverfasser:	Jo, Bong Lae, Park, Dong Seok, Nam, Soo Woo
Format:	Artikel
Sprache:	eng
Schlagworte:	ALUMINIUM BASE ALLOYS Applied sciences CHEMICAL COMPOSITION CRACK PROPAGATION DISLOCATIONS Exact sciences and technology EXPERIMENTAL DATA FATIGUE Fractures MAGNESIUM ALLOYS MANGANESE ADDITIONS MATERIALS SCIENCE Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals. Metallurgy MICROSTRUCTURE PRECIPITATION SAMPLE PREPARATION STRESS INTENSITY FACTORS TENSILE PROPERTIES TRANSMISSION ELECTRON MICROSCOPY YIELD STRENGTH ZINC ALLOYS ZIRCONIUM ADDITIONS
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Zusammenfassung:	Aging treatments and tensile tests were conducted to determine the effect of Mn dispersoids on the fatigue crack propagation behavior of Al-Zn-Mg alloys. Manganese dispersoids in the alloys were found to increase the tortuosity of the crack path and improve the fatigue crack propagation properties, probably through a crack deflection and meandering effect.
ISSN:	1073-5623 1543-1940
DOI:	10.1007/BF02648431