摘要
研究了固溶和时效处理对Mg-10Gd-2Y-0.5Zn-0.5Zr试验镁合金显微组织和力学性能的影响。结果表明,试验合金的铸态组织主要由α-Mg、Mg_(5)(Gd, Y)、Mg_(24)(Y,Gd)_(5)和Mg_(12)(Gd, Y)Zn相组成,固溶和时效处理对合金相的种类没有明显影响,但固溶温度对Mg_(12)(Gd, Y)Zn相的数量影响较大,且时效处理过程中会重新析出新的Mg_(12)(Gd, Y)Zn相。此外,经480℃×24 h固溶处理后,合金的室温抗拉强度、屈服强度和伸长率改善明显,尤其是伸长率达到了15.3%。随后,经200℃×24 h时效处理后,试验合金室温抗拉强度、屈服强度和伸长率分别达到了278 MPa、235 MPa和5.5%。
The effects of solid solution and aging treatment on the microstructure and mechanical properties of the Mg-10 Gd-2 Y-0.5 Zn-0.5 Zr experimental magnesium alloy were investigated. The results reveal that the microstructure of the as-cast alloy is mainly composed of α-Mg, Mg_(5)(Gd, Y), Mg_(24)(Y,Gd)_(5) and Mg_(12)(Gd, Y)Zn phases, and the solid solution and aging treatment have no obvious effect on the type of the alloying phases, however the solid solution temperature has a great effect on the amount of the Mg_(12)(Gd, Y)Zn phase, and the new Mg_(12)(Gd, Y)Zn phase is precipitated during the aging treatment. In addition, after being solutionized at 480 ℃×24 h for the experimental alloy, the tensile strength, yield strength and elongation at room temperature are obviously improved, especially the elongation reaches 15.3%. Furthermore, after being aged at 200 ℃×24 h, the tensile strength, yield strength and elongation of the alloy at room temperature reach 278 MPa, 235 MPa and 5.5%, respectively.
作者
李春雨
刘运
宋洁
韦皓博
阮世会
陈洁仪
吴宗钢
杨明波
Li Chunyu;Liu Yun;Song Jie;Wei Haobo;Ruan Shihui;Chen Jieyi;Wu Zonggang;Yang Mingb(School of Materials Science and Engineering,Chongqing University of Technology)
出处
《特种铸造及有色合金》
CAS
北大核心
2022年第11期1402-1407,共6页
Special Casting & Nonferrous Alloys
基金
重庆市技术创新与应用发展专项项目(cstc2019jscx-mbdxX0031,cstc2020jscx-msxmX0215)。
关键词
镁合金
Mg-Gd-Y基合金
热处理
显微组织
力学性能
Magnesium Alloys
Mg-Gd-Y Based Alloys
Heat Treatment
Microstructure
Mechanical Properties
