Effect of electric pulse modification on mircostructure and properties of Ni-rich Al-Si piston alloy

作     者：Bing Wang Jia-yi Wang Li-dan Tang Jin-gang Qi Jian-zhong Wang 

作者机构：Department of Materials Liaoning University of Technology 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2016年第13卷第2期

页      面：139-142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：financially supported by the Training Programme Foundation for the Talents by the Education Bureau of Liaoning Province,China(No.LJQ2013068) the Natural Science Foundation of Liaoning Province,China(No.201204916) the Innovation Team Program of University in Liaoning Province,China(No.LT2013014) 

主　　题：Al Si piston phase structure microhardness 

摘      要：In order to improve the properties of Ni-rich(2.5wt.%) Al-Si piston alloy, electric pulse modification was applied in fabricating the Ni-rich Al-Si piston alloy in this study. The effect of electric pulse modification on the mechanical properties of the Ni-rich Al-Si piston alloy was studied using optical microscope(OM), scanning electron microscope(SEM), X-ray diffraction(XRD), microhardness measurement and tensile strength *** results showed that the microstructures of Ni-rich Al-Si piston alloy treated by electric pulse modification were refined, the solid solubility of Cu, Ni, Si, etc. in α-Al matrix was improved, and furthermore, the microhardness and high-temperature tensile strength were increased by 9.41% and 17.5%, respectively. The distribution of second phases was also more uniform compared with that of a non-modified sample.