Effect of Y and Ce Micro-alloying on Microstructure and Hot Tearing of As-Cast Al-Cu-Mg Alloy

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外文摘要：In this work,the Al-Cu-Mg alloy with different Y(0-0.2 wt％)and Ce(0.5-1.5 wt％)are designed.The effect of mixed addition of Y and Ce on the grain structure and hot tearing for Al-4.4Cu-1.5Mg-0.15Zr alloy was investigated using"cross"hot tearing mould.The results indicate that as rare earth Y and Ce increases,the grain size becomes finer,the grain morphol-ogy changes from dendrite to equiaxed grain,and effectively reduce the hot tearing sensitivity coefficient(HTS1)and crack susceptibility coefficient(CSC)of the alloy.With the increase of Ce element(0.5-1.5 wt％),the hot tearing susceptibility of the alloy decreases first and then increases.With the increase of Y element(0-0.2 wt％),the hot tearing sensitivity of the alloy decreases.When the content of rare earth is 0.2 wt％Y+1.0 wt％Ce,the minimum HTS1 value and CSC value of the alloy are 68 and 0.53,respectively.Rare earth Ce refines the alloy microstructure,shortens the feeding channel,and reduces the hot tearing initiation.Meanwhile,the rare earth Y can form Al6Cu6Y phase at the grain boundary,improve the feeding capacity of the alloy.Therefore,appropriate addition of rare earth Y and Ce can effectively reduce the hot tearing tendency of the alloy.

外文关键词：

Al-Cu-Mg alloyY and CeMicrostructureThermal analysisHot tearing sensitivity

作者：

Chunyu Yue、Bowen Zheng、Ming Su、Yuxiang Wang、Xiaojiao Zuo、Yinxiao Wang、Xiaoguang Yuan

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作者单位：

School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China

Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

基金：

National Natural Science Foundation of ChinaLiaoning Province Science and Technology Plan Joint Fund ProjectLiaoning Province Science and Technology Plan Joint Fund ProjectScientific Research Fund of Liaoning Provincial Education Department

项目编号：

518753652023-BSBA-2482023-MSLH-265LJKZ0122

出版年：

2024

DOI：

10.1007/s40195-024-01671-7

金属学报(英文版)

中国金属学会

金属学报(英文版)

CSTPCD

影响因子：0.77

ISSN：1006-7191

年,卷(期)：2024.37(6)