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材料导报  2020, Vol. 34 Issue (18): 18104-18108    https://doi.org/10.11896/cldb.19060132
  金属与金属基复合材料 |
Mg-11Gd-3Y-1.1Zn-0.5Zr的高温热压缩行为及热加工图
王颂博1, 李全安1,2, 陈晓亚1,3, 朱利敏1, 张帅1, 关海昆1
1 河南科技大学材料科学与工程学院,洛阳 471023
2 有色金属共性技术河南省协同创新中心,洛阳 471023
3 西安理工大学材料科学与工程学院,西安 740048
High Temperature Thermal Compression Behavior and Processing Map of Mg-11Gd-3Y-1.1Zn-0.5Zr
WANG Songbo1, LI Quan'an1,2, CHEN Xiaoya1,3, ZHU Limin1, ZHANG Shuai1, GUAN Haikun1
1 School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
2 Collaborative Innovation Center of Nonferrous Metals, Henan Province, Luoyang 471023, China
3 School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 740048, China
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摘要 采用Gleeble-1500热模拟试验机对均匀化后的Mg-11Gd-3Y-1.1Zn-0.5Zr合金进行了温度为350~500℃、应变速率为0.002~1 s-1的热压缩实验,构建了合金高温塑性变形的本构方程,建立并分析了合金的热加工图。结果表明:Mg-11Gd-3Y-1.1Zn-0.5Zr合金热变形发生了动态回复和动态再结晶,合金的流变应力随温度的升高和应变速率的降低而升高,合金热变形激活能Q=286.134 kJ/mol;合金在T=380~500℃、ε·=0.002~0.05 s-1区域能量耗散率大于30%且不发生失稳,适合热加工。
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王颂博
李全安
陈晓亚
朱利敏
张帅
关海昆
关键词:  Mg-11Gd-3Y-1.1Zn-0.5Zr合金  热压缩  本构方程  加工图    
Abstract: The homogenized Mg-11Gd-3Y-1.1Zn-0.5Zr alloy was subjected to the hot compression experiment with the temperature of 350—500℃ and the strain rate of 0.002—1 s-1 using a Gleeble-1500 thermal simulator. The constitutive equation of high temperature plastic deformation was established and analyzed. The results showed that the dynamic recover and dynamic recrystallization of Mg-11Gd-3Y-1.1Zn-0.5Zr alloy occurred, and the flow stress of the alloy increased with the increase of temperature and strain rate. The thermal deformation activation energy of the alloy was about 286.134 kJ/mol; the regional energy dissipation rate of the alloy at T=380—500℃, ε·=0.002—0.05 s-1 was greater than 30% and no instability, which indicates that the alloy is suitable for thermal processing.
Key words:  Mg-11Gd-3Y-1.1Zn-0.5Zr alloy    hot compression    constitutive equation    processing map
                    发布日期:  2020-09-12
ZTFLH:  TG146.2  
基金资助: 国家自然科学基金(51571084;51171059)
通讯作者:  q-ali@163.com   
作者简介:  王颂博,河南科技大学在读工程硕士研究生,专业研究方向为先进镁合金,主要从事高性能镁合金的设计与开发。
李全安,河南科技大学,教授。目前主要从事稀土功能材料、稀土镁合金、稀土铝合金、稀土表面改性等研究。主持国家自然科学基金、河南省杰出人才基金、河南省杰出青年基金等项目10余项。发表研究论文300余篇,获国家发明专利授权20余项。
引用本文:    
王颂博, 李全安, 陈晓亚, 朱利敏, 张帅, 关海昆. Mg-11Gd-3Y-1.1Zn-0.5Zr的高温热压缩行为及热加工图[J]. 材料导报, 2020, 34(18): 18104-18108.
WANG Songbo, LI Quan'an, CHEN Xiaoya, ZHU Limin, ZHANG Shuai, GUAN Haikun. High Temperature Thermal Compression Behavior and Processing Map of Mg-11Gd-3Y-1.1Zn-0.5Zr. Materials Reports, 2020, 34(18): 18104-18108.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.19060132  或          http://www.mater-rep.com/CN/Y2020/V34/I18/18104
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