【摘 要】
：
In order to improve the properties of Ni-rich (2.5wt.%) Al-Si piston aloy, electric pulse modiifcation was applied in fabricating the Ni-rich Al-Si piston aloy
【机 构】
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Department of Materials
【基金项目】
：
This study was ifnancialy supported by the Training Programme Foundation for the Talents by the Education Bureau of Liaoning Province, China;the Natural Science Foundation of Liaoning Province, China;
论文部分内容阅读
In order to improve the properties of Ni-rich (2.5wt.%) Al-Si piston aloy, electric pulse modiifcation was applied in fabricating the Ni-rich Al-Si piston aloy in this study. The effect of electric pulse modiifcation on the mechanical properties of the Ni-rich Al-Si piston aloy was studied using optical microscope (OM), scanning electron microscope (SEM), X-ray diffraction (XRD), microhardness measurement and tensile strength testing. The results showed that the microstructures of Ni-rich Al-Si piston aloy treated by electric pulse modiifcation were reifned, the solid solubility of Cu, Ni, Si, etc. inα-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-modiifed sample.
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