An understanding of the hot tearing mechanism in AZ91 magnesium alloy

A new method of investigating the hot tearing behavior of magnesium alloys is developed. The results of measurement, by EDAX and optical microcopy revealed that the end-solidifying temperature was around the eutectic temperature under practical solidification conditions, because of a quantity of eut...

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Veröffentlicht in:	Materials letters 2002-03, Vol.53 (1), p.35-39
Hauptverfasser:	Wang, Yeshuang, Sun, Baode, Wang, Qudong, Zhu, Yanping, Ding, Wenjiang
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences AZ91 magnesium alloy Dentritic segregation Exact sciences and technology Fractures Hot tearing Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals. Metallurgy Microstructure
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Beschreibung
Zusammenfassung:	A new method of investigating the hot tearing behavior of magnesium alloys is developed. The results of measurement, by EDAX and optical microcopy revealed that the end-solidifying temperature was around the eutectic temperature under practical solidification conditions, because of a quantity of eutectic caused by dendritic segregation. The temperature at which hot tearing occurred most probably in the AZ91 alloy was the practical end-solidifying temperature, which was 424.2 °C in the present solidification conditions. The appearance of eutectic was the inducement for hot tearing of AZ91 alloy.
ISSN:	0167-577X 1873-4979
DOI:	10.1016/S0167-577X(01)00449-9