Effect of homogenizing treatment on microstructures and properties of AZ91 alloy

Acta Metall Sin

2006, Vol. 42

Issue (10): 1014-1018 DOI:

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Effect of homogenizing treatment on microstructures and properties of AZ91 alloy

北京科技大学材料科学与工程学院

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. Effect of homogenizing treatment on microstructures and properties of AZ91 alloy. Acta Metall Sin, 2006, 42(10): 1014-1018 .

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Abstract There are reticular coarse Mg17Al12 and component segregation generated during solidification on grain boundary of AZ91 magnesium alloy as cast, which deteriorate the mechanical properties and the workability of ingots severely. In order to improve the workability, homogenizing treatment is researched. The homogenizing temperature is 350, 380, 420, 450℃ and the holding time is 5, 10, 15, 24h. After homogenizing treatment, the Mg17Al12 phase is scattered on the α-Mg matrix as fine grains, and dendritic segregation is eliminated almost. It is concluded from the mechanical properties test that the tensile strength of the AZ91 on the condition of as-cast, homogenized at 380℃15h and 420℃5h is about 163MPa, 243MPa and 246MPa, while the elongation is about 3.2%, 11.2% and 10%.

Key words: magnesium alloy homogenizing treatment microstructure mechanical property

Received: 13 December 2005

ZTFLH:

TG166.4

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2006/V42/I10/1014

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