Microstructural evolution and precipitation behavior of Al-7Si-3Cu alloy prepared under 5 GPa
作者机构：Key Laboratory for Precision Hot Processing of MetalsHarbin Institute of Technology150001 HarbinChina
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2023年第159卷第28期
页 面：138-150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：the National Natu-ral Science Foundation of China(Nos.52231002 and 51774105) the Touyan Innovation Team Program(No.XNAUEA5640208420) the Foundation of National Key Laboratory for Precision Hot Pro-cessing of Metals(No.6142909210202)
主 题：Al-Si-Cu alloy High pressure Nanocrystalline eutectics Precipitates Mechanical properties
摘 要：This paper presents a systematic investigation of the microstructural evolution and mechanical proper-ties of Al-7Si-3Cu alloys prepared under high pressure of 5 *** is found that the dendritic structure disappears due to the enhanced stability of the growth interface under high ***,a con-siderable solute-induced modification effect is achieved in the eutectic ***,unconventional larger eutectic colonies and ultrafine nanocrystalline eutectics are observed within the intragranular ***-bined with detailed microstructural characterization,the crucial role of high pressure on the evolution of these isolated phases is *** study also explores the precipitation behavior and strengthening mechanisms of alloys prepared under direct aging and solution-aging *** the direct aging treatment,θ’phases,coarse Al 2 Cu particles,and Si particles form simultaneously in the matrix owing to the increased solid solubility of alloying elements,which results in the highest mechanical properties with a microhardness of 132.8 HV and compressive stress of 715 ***-aging treatment leads to the segregation of Si onθ’phases,which proved to be energetically favorable according to first-principles *** work provides new insights into the microstructural optimization of aluminum-silicon-based alloys through high-pressure manipulation and paves the way for further industrial applications.
维普期刊数据库