Effect of V on high-temperature mechanical properties of Al-5Cu-1.5Ni alloy

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外文摘要：The effects of V on microstructure,room temperature,and high-temperature(350 ℃)mechanical properties of Al-5Cu-1.5Ni alloy were investigated.The results show that Al-5Cu-1.5Ni-xV alloys mainly comprise α-Al,Al2Cu,Al3(Ni,Cu)2,Al3Ni,Al7Cu4Ni,and Al10V phases.The addition of V can signally refine α-Al dendritic structure,which improves the mechanical properties of the as-cast alloys at room and high temperatures.After T6 heat treatment(540 ℃/12 h/WC+170 ℃/8 h/AC),α-Al,network skeleton structure Al3(Ni,Cu)2,and Al10V phases all show coarsening,while the fine nano-θ'-Al2Cu precipitated from the matrix and dispersed distributed.The introduction of V promotes the quantity of precipitated θ'-Al2Cu particles.The ultimate tensile strength of the heat-treated alloys at room and high temperatures is greatly improved compared to that of the as-cast alloy.The highest high-temperature ultimate tensile strength of the alloys with V is 111.8 MPa,21.5％higher than that of the base alloy.The analysis shows that the improvement of high-temperature mechanical properties after heat treatment is mainly due to the introduction of V,increasing the precipitated quantity of nano-θ'-Al2Cu particles and improving its thermal stability.The dispersion strengthening effect of θ'-A12Cu particles exceeds the weakening effect of other adverse microstructures on the mechanical properties.

外文关键词：

Al-Cu-Ni-V alloyθ'-A12Cu phaseHeat treatmentMicrostructureMechanical property

作者：

Jun-ge Cui、Yong-bin Chen、Xiang-zhou Fu、Hai-long Yang、Han-zhang Wang、An-min Li、Li-wen Pan

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作者单位：

School of Resources,Environment and Materials,Guangxi University,Nanning 530004,Guangxi,China

State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures,Nanning 530004,Guangxi,China

Guangxi Higher Education Key Laboratory of Advanced Materials,Nanning 530004,Guangxi,China

基金：

Special Project of Material Processing of Guangxi Key Laboratory of Processing for Nonferrous Metal and Featured MaterialsYouth Fund of Guangxi Key Laboratory of Processing for Nonferrous Metal and Featured MaterialsSpecial Funds for Local Scientific and Technological Development under the Guidance of the Central Government in 2021Guangxi Science and Technology Base and Talent Project in 2022Guangxi University Students Innovation and Entrepreneurship Training Program

项目编号：

2021GXMPSF04GXYSYF1806GuiKeZY21195030GuiKeAD21238010202210593118

出版年：

2024

DOI：

10.1007/s42243-023-01115-z

钢铁研究学报(英文版)

钢铁研究总院

钢铁研究学报(英文版)

CSTPCD

影响因子：0.584

ISSN：1006-706X

年,卷(期)：2024.31(7)