中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 11 November 2025 |
（1. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;
2. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400045, China;
3. AECC Guiyang Engine Design Research Institute, Guiyang 550014, China）
Abstract:The impact of Y content on the microstructure, mechanical properties, and electromagnetic interference shielding effectiveness (EMI SE) of the Mg-6Zn-xY-1La-0.5Zr alloy was investigated. After the extrusion treatment of Mg-6Zn-xY-1La-0.5Zr alloy, the large grains that did not experience dynamic recrystallization were elongated along the extrusion direction, and the small-sized dynamic recrystallized grains were distributed around the large grains. The Mg-6Zn-1Y-1La-0.5Zr alloy demonstrated a favorable balance between strength and plasticity, exhibiting ultimate tensile strength, yield strength, and elongation values of 332.3 MPa, 267.3 MPa, and 16.2%, respectively. Moreover, the EMI SE within the frequency range of 30-1500 MHz changes from 79 to 110 dB, aligning with the electromagnetic shielding requirements of many high-strength applications.
Key words: Mg-Zn-Y-La-Zr alloys; dynamic recrystallization; microstructure; mechanical properties; electromagnetic interference shielding effectiveness
