Affiliation:
1. Technical University of Košice
Abstract
The work analyses microstructures of ZnAl4Cu1, ZnAl27Cu2 and ZnAl40Cu2Si2 alloys in cast condition and after heat treatment in relation to microhardness HV0.2 and purity of the alloys. As shown the microstructure of ZnAl4Cu1 alloy contained η phase and eutectoid, which consisted phases α + η. ZnAl27Cu2 alloy contained α phase, eutectoid and ε phase, and ZnAl40Cu2Si2 alloy had a similar composition, but moreover contained Si particles. Microhardness in the molten state in ZnAl4Cu1 alloy was HV0.2 = 94, in ZnAl27Cu2 alloy it was HV0.2 = 117, and in ZnAl40Cu2Si2 alloy it was HV0.2 = 142.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference8 articles.
1. Y. H. Zhu: General Rule of Phase Decomposition in Zn-Al Based Alloys (II) - in Effects of External Stresses on Phase Transformation, Materials Transactions, Vol. 45, No. 11 (2004) 3083 – 3097.
2. T. Savaskan, A. P. Hekimoglu: Microstructure and mechanical properties of Zn-15Al-based ternary and quaternary alloys, Materials Science & Engineering A, Vol. 603, (2014) 52-57.
3. M. Durman, K. Sawalha, S. Murphy: An electron metallographic study of the commercial zinc-based pressure-die-cast alloy 3, Materials Science and Engineering, A 130 (1990) 247-256.
4. V. A. Toldin, A. A. Burykin, G. V. Kleshchev, Phys. Met. Metallogr. (Engl. Trans. ), 51, (1), (1981) 116-124.
5. S. Krýslová, I. Nová: The Wall Thickness Influence of Casting and Mould on Dilatation Property from Pure Zinc and Zinc Alloys, Hradec nad Moravicí, Metal (2008) 1- 5.