3(Sc,Zr)相"/> 3(Sc,Zr)相抑制主強(qiáng)化相η'相的析出，隨著合金中鈧含量的增加抑制效果更為明顯，從而弱化析出強(qiáng)化效果；合金晶粒的細(xì)化有利于拉伸過(guò)程形成更多更細(xì)小的韌窩，提升板材延伸率；鈧含量為0.02%Sc的合金在經(jīng)過(guò)軋制+T6熱處理后綜合力學(xué)性能優(yōu)良，其抗拉強(qiáng)度為683 MPa、延伸率為21%。"/>

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低鈧含量Al-Zn-Mg-Cu-Zr鋁合金的組織性能研究
作者:
作者單位:

1.集美大學(xué) 海洋裝備與機(jī)械工程學(xué)院，福建 廈門(mén) 361021;2.湖南科技大學(xué) 高功效輕合金構(gòu)件成形技術(shù)及耐損傷性能評(píng)價(jià)湖南省工程研究中心，湖南 湘潭 411201;3.江西銅業(yè)技術(shù)研究院有限公司，江西 南昌 330096;4.廣東海洋大學(xué) 材料科學(xué)與工程學(xué)院，廣東 陽(yáng)江 529500;5.中南大學(xué) 輕合金研究院，湖南 長(zhǎng)沙 410083

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

TG135+.1;TG146.21

基金項(xiàng)目:

國(guó)家自然科學(xué)基金（52475356，52471132，52471055，52475357，U21A20130）；江西省自然科學(xué)基金杰出青年基金（20224ACB218002）；福建省自然科學(xué)基金杰出青年基金（2024J010031）


Microstructure and Properties of Al-Zn-Mg-Cu-Zr Alloy with Low Scandium Content
Author:
Affiliation:

1.School of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, China;2.Hunan Engineering Research Center of Forming Technology and Damage Resistance Evaluation for High Efficiency Light Alloy Components, Hunan University of Science and Technology, Xiangtan 411201, China;3.Jiangxi Copper Technology Research Institute Co., Ltd, Nanchang 330096, China;4.School of Materials Science and Engineering, Guangdong Ocean University, Yangjiang 529500, China;5.Light Alloy Research Institute, Central South University, Changsha 410083, China

Fund Project:

National Natural Science Foundation of China（52475356、52471132、52471055、52475357、U21A20130）、Natrual Science Foundation of Jiangxi Province for Distinguished Young Scholars（20224ACB218002）、Natrual Science Foundation of Fujian Province for Distinguished Young Scholars (2024J010031)

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    摘要:

    利用OM、SEM、TEM和萬(wàn)能材料試驗(yàn)機(jī)研究了低鈧含量（0.02%、0.07%、0.12%，質(zhì)量分?jǐn)?shù)）Al-Zn-Mg-Cu-Zr鋁合金的析出行為與力學(xué)性能之間的關(guān)系。結(jié)果表明：隨著鈧含量的增加，合金中鑄態(tài)組織逐漸細(xì)化，晶界處粗大第二相增加，削弱了細(xì)晶強(qiáng)化效果；軋制+T6態(tài)下的Al3(Sc,Zr)相抑制主強(qiáng)化相η'相的析出，隨著合金中鈧含量的增加抑制效果更為明顯，從而弱化析出強(qiáng)化效果；合金晶粒的細(xì)化有利于拉伸過(guò)程形成更多更細(xì)小的韌窩，提升板材延伸率；鈧含量為0.02%Sc的合金在經(jīng)過(guò)軋制+T6熱處理后綜合力學(xué)性能優(yōu)良，其抗拉強(qiáng)度為683 MPa、延伸率為21%。

    Abstract:

    The relationship between the mechanical properties and precipitation behavior of Al-Zn-Mg-Cu-Zr aluminum alloys with low Sc content (0.02wt%, 0.07wt%, 0.12wt%) was investigated by OM, SEM, TEM, and universal material testing machine. With the increase in Sc content, microstructure of as-cast alloy is gradually refined, and the coarse secondary phase at the grain boundary increases, thus weakening the effect of fine grain strengthening. In the alloy at rolling+T6 state, the Al3(Sc,Zr) phase inhibits the precipitation of the main strengthening phase η', and the inhibition effect becomes more obvious with the increase in Sc content, thus weakening the precipitation strengthening effect. The grain refinement is conducive to the formation of more and finer dimples during the tensile deformation, thus improving the ductility of the alloy. The low Sc content alloy (0.02wt%) shows the excellent mechanical properties after rolling and T6 heat treatment, whose tensile strength and elongation are 683 MPa and 21%, respectively.

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朱必武,肖罡,劉筱,葉帆,張維,崔曉麗,詹海鴻,劉文輝.低鈧含量Al-Zn-Mg-Cu-Zr鋁合金的組織性能研究[J].稀有金屬材料與工程,2025,54(3):722~729.[Zhu Biwu, Xiao Gang, Liu Xiao, Ye Fan, Zhang Wei, Cui Xiaoli, Zhan Haihong, Liu Wenhui. Microstructure and Properties of Al-Zn-Mg-Cu-Zr Alloy with Low Scandium Content[J]. Rare Metal Materials and Engineering,2025,54(3):722~729.]
DOI：10.12442/j. issn.1002-185X.20240552

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  • 收稿日期:2024-08-26
  • 最后修改日期:2024-11-18
  • 錄用日期:2024-12-02
  • 在線發(fā)布日期: 2025-03-25
  • 出版日期: 2025-03-25