Enhanced Damping Capacities of Mg-Ce Alloy by the Special Microstructure with Parallel Second Phase

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2017,（9）
• 页码范围: 941-946
• 页数: 6页
• 语种: 英文

摘要

Microstructure evolution and damping capacities of Mg-Ce binary alloys with three different Ce contents (0.5,1,or 2 wt％) have been systematically investigated in this work.Numerous fine parallel second phases in Mg-2Ce alloy are obtained,as well as a large number of dislocations around them,but few dislocations appear around the reticular second phase in the Mg-1Ce alloy.Among the three alloys,two internal friction peaks (P1 and P2) are detected at about 78 and 167 ℃ in both the Mg-0.5Ce and Mg-1Ce alloys.In addition,the alloy with special parallel second phase structure exhibits excellent damping capacity in both strain amplitude and temperature-dependent regions.These results may be ascribed to the stress concentration and the formation of abundant parallel and uniform dislocation configurations in the α-Mg matrix without the influence of crystal orientation.The obtained results may provide a novel idea to preDare high-damDing magnesium alloys bv tailoring their microstructure.