Dependence of microstructural, mechanical and electrical properties on growth rates in directional solidified Zn-Al-Bi eutectic alloy

作     者：Yasin KARAMAZI Umit BAYRAM Pinar ATA Sezen AKSOZ Kazim KESLIOGLU Necmettin MARASLI 

作者机构：Department of PhysicsInstitute of Science and TechnologyErciyes UniversityKayseri 38039Turkey Department of PhysicsFaculty of ScienceErciyes UniversityKayseri 38039Turkey Department of PhysicsInstitute of Science and TechnologyNevsehir Hacl Bektas Veli UniversityNevsehir 50300Turkey Department of PhysicsFaculty of Arts and SciencesNevsehir Haci Bektas Veli UniversityNevsehir 50300Turkey Department of Metallurgical and Materials EngineeringFaculty of Chemistry and Metallurgical EngineeringYildiz Technical UniversityDavutpasa-EsenlerIstanbul 34220Turkey 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2016年第26卷第9期

页      面：2320-2335页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：supported by Erciyes University Scientific Research Project Unit under Contract No:FYL-2013-4841 

主　　题：directional solidification zinc-aluminum alloy microstructure microhardness tensile strength electrical properties 

摘      要：Zn-5%Al-0.2%Bi（mass fraction） alloy was directionally solidified upward at a constant temperature gradient with a wide range of growth rates using a Bridgman-type directional solidification furnace. The eutectic spacings, microhardness, ultimate tensile strength and electrical resistivity for directionally solidified Zn-Al-Bi alloy were measured. Dependence of eutectic spacings, microhardness, ultimate tensile strength and electrical resistivity on growth rates was obtained by linear regression analysis. The results obtained in the present work for low growth rates（smaller than 450.0 μm/s） are in good agreement with experimental results obtained in previous work for directional solidified Zn-Al eutectic alloy with a similar growth rate but differs from the Jackson-Hunt eutectic theory and those obtained in previous experimental works at higher growth rates. The critical growth rate might be 450.0 μm/s for the Zn-Al-Bi eutectic alloy. From the plot of heat flow versus temperature, enthalpy of fusion, specific heat difference between liquid and solid phases and melting temperature for the Zn-Al-Bi alloy are found to be 112.55 J/g, 0.291 J/（g·K） and 660.20 K, respectively.