The Influence of the Solutionizing and Ageing on the Structure and Hardness of the ZnAl40Cu3 Alloy

Abstract:

Zn-Al alloys are mainly used due to their tribological properties as an alternative material for bronze, cast irons and aluminum in a bearings and as a construction material. Particular interesting is Zn-40Al-3Cu alloy due to its features. Improvement of the alloy’s features can be obtained by silicon addition, plastic working, heat treatment – solutionizing and ageing. In the article have been shown results of the ZnAl22Cu3 alloy examination as - cast and subjected solutionizing and ageing 385 ^oC/10h + 175 ^oC/1h and 385 ^oC/10h + 175 ^oC/10h. The scope of examination included: structure testing using scanning microscope, X - ray microanalysis, hardness test. There was found significant decrease of hardness of the tested alloy. Structural examinations have shown that initially in the structure were visible precipitates reach in aluminum and copper. Also were visible precipitates reach in zinc. With increasing time of soaking at 175 ^oC precipitates reach in aluminum and copper disappeared.

• Periodical: Solid State Phenomena (Volume 226)
• Pages: 91-94
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.226.91
• Online since: January 2015
• Authors: Rafał Michalik*, Bartosz Chmiela
• Keywords: Hardness, Heat Treatment, Structure, Zn-Al-Cu Alloys

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