Effect of Ce addition on hot tearing behavior of AZ91 alloy

被引：0
|
作者：
Wenjun Liu [1 ,2 ]
Bin Jiang [1 ,2 ]
Qingshan Yang [3 ]
Jianquan Tao [4 ]
Bo Liu [2 ]
Fusheng Pan [2 ]
机构：
[1] College of Materials Science and Engineering, Chongqing University
[2] Chongqing Academy of Science and Technology
[3] School of Metallurgy and Material Engineering, Chongqing University of Science & Technology
[4] Southwest Technique and Engineering Institute
来源：
Progress in Natural Science:Materials International | 2019年 / 29卷 / 04期
基金：
中国国家自然科学基金;
关键词：
AZ91; alloy; Cerium addition; Hot tearing susceptibility; Microstructure evolution; Fracture mechanisms;
D O I：
暂无
中图分类号：
TG292 [轻金属铸造];
学科分类号：
080201 ; 080503 ;
摘要：
A small amount of cerium（below 1.0 wt%） addition to AZ91 alloy have been investigated on the hot tearing susceptibility（HTS） at a cooling rate of 1.5 Ks;.The HTS increased to a maximum value with a cerium addition of 0.6 wt% and then decreased to a stable status as cerium was gradually added.Due to high chemical activity,cerium into the melts can react with aluminum to form an Al;Ce;intermetallic compound.X-ray diffraction results also confirmed the existence of Al;Ce;.The Al;Ce;increased with the presence of the needle-like and block morphology.As cerium levels increased,the amount of Mg;Al;decreased.The variations between Mg;Al;and Al;Ce;resulted in a similar normal distribution of the HTS in AZ91 alloy.The findings were further verified through the microstructure evolution and the surface morphology of fracture.
引用
收藏
页码：453 / 456
页数：4
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