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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第28卷    第4期    总第229期    2018年4月

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文章编号:1004-0609(2018)-04-0705-07
冷加工变形量对Al2O3-弥散强化铜合金组织与性能的影响
张雪辉,李晓闲,刘位江,杨 凯,祝绳健,蒋 苗

(江西理工大学 材料科学与工程学院,赣州 341000)

摘 要: 采用原位反应合成技术制备了Cu-1.12%Al2O3合金(质量分数),通过力学性能、导电率测试及显微组织观察系统研究该合金的冷变形行为。结果表明:对热挤压态合金进行不同变形量的冷拉抜加工处理后,合金的硬度和强度均随变形量的增大而增加,合金加工硬化现象明显,但导电率的变化甚微;冷加工使合金的致密度和位错密度获得进一步的提升,同时由于Al2O3粒子的钉扎位错和阻碍晶界滑移作用,出现位错线缠结和位错塞积,并发展成为变形位错胞组织和亚晶组织。

 

关键词: Cu-1.12%Al2O3合金;冷加工行为;力学性能;显微组织

Effect of cold deformation on microstructures and properties of Al2O3-dispersion strengthened copper
ZHANG Xue-hui, LI Xiao-xian, LIU Wei-jiang, YANG Kai, ZHU Sheng-jian, JIANG Miao

School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

Abstract:Cu-1.12%Al2O3 composite was fabricated by in-situ reactive synthesis technology, and its cold deformation behavior was studied by mechanical property measurement, electrical conductivity test and microstructure observation, respectively. The results show that the rockwell hardness and strength increase with increasing the cold deformation of as-extruded Cu-1.12%Al2O3 alloy, and the work hardening phenomenon is obvious, but the change of electrical conductivity is very small. The density and dislocation density of Cu-1.12%Al2O3 alloy further increase after cold deformation. Since the tiny alumina particles can pin dislocation and hinder the grain boundary motion, the dislocation tangle and dislocation pileup generate, and then develop into the dislocation cell or subgrain.

 

Key words: Cu-1.12%Al2O3 alloy; cold drawing behavior; mechanical property; microstructure

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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