Effect of Yttrium Addition (0.2%) on the Hot Compression Behavior of the As-cast Mg-Sn Alloy

被引：0
|
作者：
Yang Qiurong [1 ]
Zeng Ying [1 ]
Zhou Mingyang [1 ]
Huang Guanghao [1 ]
Ren Lingbao [1 ]
Lu Jiawei [1 ]
Yin Dongdi [1 ]
Jiang Bing [2 ]
机构：
[1] Southwest Jiaotong Univ, Key Lab Adv Technol Mat, Minist Educ China, Chengdu 610031, Sichuan, Peoples R China
[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2019年 / 48卷 / 07期
关键词：
Y content; Mg-Sn alloy; thermal deformation behavior; deformation mechanisms; processing map; MECHANICAL-PROPERTIES; DEFORMATION-BEHAVIOR; TENSILE PROPERTIES; MAGNESIUM ALLOY; MICROSTRUCTURE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The uniaxial hot compression tests of cast Mg-2.5Sn (wt/%) and Mg-2.5Sn-0.2Y (wt/%) alloys were conducted on an MTS-CMT5105 universal testing machine at 250-400 degrees C and the strain rate of 10(-4)similar to 10(-1) s(-1) with strain of 40%. The effect of yttrium (Y) addition content (0.2 %) on the hot compression behavior of the cast Mg-Sn alloy was investigated by true stress-strain curves, peak stress, microstructures, constitutive equation, and DMM processing maps. The results show that the Y addition increases the peak stress of Mg-Sn alloy by more than 30% at low strain rate, but it has little effect on it at high strain rate. Deformation mechanism is changed from the lattice diffusion to dislocation slip and climb. In addition, Y retards the dynamic recrystallization, reduces the efficiency of power dissipation and expands the flow instability area.
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页码：2275 / 2283
页数：9
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