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低温慢速挤压下SiCp/AZC910复合材料的显微组织与力学性能

发表时间:2016-12-31  浏览量:1414  下载量:309
全部作者: 张潇,邓坤坤
作者单位: 太原理工大学材料科学与工程学院
摘 要: 通过搅拌铸造工艺制备出10 μm 1%SiCp/AZC910(体积分数)复合材料,并对其在250℃、0.03 mm/s的条件下进行热挤压。研究结果表明,经低温慢速挤压后,SiCp/AZC910复合材料基体中析出大量的Mg17Al12相,并呈现“双晶”组织,即晶粒细小的动态再结晶(dynamic recrystallized,DRXed)区和粗大的未动态再结晶(undynamic recrystallized,unDRXed)区。SiCp/AZC910复合材料经低温慢速挤压后的屈服强度、抗拉强度和延伸率分别为~307.27 MPa,~367.90 MPa和~3.26%,具有较好的综合力学性能。
关 键 词: 金属基复合材料;镁基复合材料;低温慢速挤压;显微组织;力学性能
Title: Microstructure and mechanical properties of the SiCp/AZC910 composite by low-temperature and slow-speed extrusion
Author: ZHANG Xiao, DENG Kunkun
Organization: College of Materials Science and Engineering, Taiyuan University of Technology
Abstract: In this paper, 10 μm 1%SiCp/AZC910 (volume percentage) composite was fabricated by stir casting. Then, the composite was subjected to hot extrusion at 250℃ with ram speed of 0.03 mm/s. The results illustrated that a large number of Mg17Al12 precipitated in the matrix of SiCp/AZC910 composite, which exhibited a bimodal microstructure consisting of fine dynamic recrystallized (DRXed) grains and coarse undynamic recrystallized (unDRXed) area. After being extruded at low temperature and slow speed, the yield strength, tensile strength and elongation of SiCp/AZC910 composite were ~307.27 MPa, ~367.90 MPa and ~3.26%, respectively, which showed excellent mechanical properties.
Key words: metal matrix composites; magnesium matrix composite; low-temperature and slow-speed extrusion; microstructure; mechanical properties
发表期数: 2016年12月第24期
引用格式: 张潇,邓坤坤. 低温慢速挤压下SiCp/AZC910复合材料的显微组织与力学性能[J]. 中国科技论文在线精品论文,2016,9(24):2519-2524.
 
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