Nano-scale Reinforcements and Properties of Al-Si-Cu Alloy Processed by High-Pressure Torsion  

作　　者：DONG Ying WU Siyuan HE Ziyang LIANG Chen CHENG Feng HE Zuwei QIAN Chenhao 董莹;钱陈豪

机构地区：[1]School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China [2]Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology,Wuxi 214122,China [3]School of International Studies,Renmin University of China,Beijing 100872,China [4]School of Engineering,University of Liverpool,Liverpool L693GH,United Kingdom

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第5期1253-1259,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.51905215);Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.SJCX23_1233);Major Scientific and Technological Innovation Project of Shandong Province of China(No.2019JZZY020111);the National College Students Innovation and Entrepreneurship Training Program of China(No.CX2022415)。

摘　　要：To improve the comprehensive mechanical properties of Al-Si-Cu alloy,it was treated by a high-pressure torsion process,and the effect of the deformation degree on the microstructure and properties of the Al-Si-Cu alloy was studied.The results show that the reinforcements(β-Si andθ-CuAl_(2)phases)of the Al-Si-Cu alloy are dispersed in theα-Al matrix phase with finer phase size after the treatment.The processed samples exhibit grain sizes in the submicron or even nanometer range,which effectively improves the mechanical properties of the material.The hardness and strength of the deformed alloy are both significantly raised to 268 HV and 390.04 MPa by 10 turns HPT process,and the fracture morphology shows that the material gradually transits from brittle to plastic before and after deformation.The elements interdiffusion at the interface between the phases has also been effectively enhanced.In addition,it is found that the severe plastic deformation at room temperature induces a ternary eutectic reaction,resulting in the formation of ternary Al+Si+CuAl_(2)eutectic.

关 键 词：Al-Si-Cu alloy high-pressure torsion nano-scale reinforcements ternary eutectic 

分 类 号：TG146.21[一般工业技术—材料科学与工程]