SEARCH RESULT

Pb and Pb-containing compounds are prohibited to use in European Union, because of damaging the environment and human health. Limitation of lead used in the industry for more appropriate development policies to protect the environment is emphasized by most countries. In this context, great efforts for the development of lead-free alternative alloys instead of Pb-Sn eutectic solder alloy is shown [1-2]. Both economically and in terms of other physical and chemical requirements of lead-free solder alloy is required to meet. Sn-Zn eutectic alloy of lead-free solder alloy as prominently provides electronic merge without any modification and is expected to be one of the best alternatives to maintain the existing production line [3-4]. In addition, both micromechanical and metallurgical properties in terms of controlling the microstructure, strength, a casting alloy is complex in terms of silence and ductility. Thermal variables and their impact on the microstructure morphology depending on the heat transfer solidification conditions are influenced by the temperature and composition and are affected all the features as a direct result [5-7]. In this study, Sn-1wt.% Zn, Sn-9wt.% Zn and Sn-14wt.% Zn alloys were cast into the kokil mold. Structural, surface and composition analyses of the obtained alloys were obtained by using SEM, EDX, XRD devices. The variation of Zn amount has a great impact on the grain size, and flake or needle shape distributions of Zn phase in Sn matrix result in different effects on hardness. Also, the microstructures changed from tetragonal solid solution phase to before monoclinic and orthorhombic solution phase and then hexagonal phase. Mechanical properties (yield, elongation, elongation and breakage) were also obtained by using a tensile tester. The tensile test results for Sn-1wt.% Zn, Sn-9wt.% Zn and Sn-14wt. indicating that the sample with the best mechanical properties is Sn-9wt.% Zn. In addition, the tensile value obtained for the Sn-9wt.% Zn sample is 105.8 MPa, the unit strain is 12.8% and the yield stress is 85.548 MPa. Average micro hardness values of Sn-[x] wt. % Zn [x=1, 9, 14] alloys were given Table 1 According to these results, micro hardness values only depend on the composition, and increase with increasing of Zn composition.

International Symposium on Light Alloys and Composite Materials
UHAKS

Fazil Hüsem Ceyda Albayrak Furkan Nergiz Fatma MEYDANERİ TEZEL Umur Can Hamutoğlu Salih Bektaş