纳米晶Al-Cu-Mg合金的微观组织与力学性能研究  

Study on Microstructure and Mechanical Properties of Nanocrystalline Al-Cu-Mg Alloy

作　　者：田晓风[1] 樊建中[1] 肖伯律[1] 杨滨[2] 程军胜[2] 万志永[1] 

机构地区：[1]北京有色金属研究总院国家有色金属复合材料工程技术研究中心,北京100088 [2]北京科技大学新金属材料国家重点实验室,北京100088

出　　处：《稀有金属》2007年第2期165-168,共4页Chinese Journal of Rare Metals

基　　金：国家"863"计划资助项目(2002AA302502)

摘　　要：以工程实际中应用较广的Al-Cu-Mg铝合金作为研究对象,用Al-Cu-Mg铝合金气体雾化粉末作为原材料,通过低温液氮球磨获得纳米晶后,再经真空热压和热挤压制备了致密的大块体纳米材料。通过力学性能测试,挤压态的纳米晶Al-Cu-Mg块体材料抗拉强度达470 MPa,经过T4处理后,抗拉强度达到590 MPa,远远超过常规方法制备的Al-Cu-Mg铝合金抗拉强度。对纳米晶Al-Cu-Mg块体材料进行微观组织观察,分析了材料强度提高的原因。Al-Cu-Mg spray atomized powder was cryomilled, then vacuum hot pressed and extruded to produce bulk nanocrystalline material. The extruded bar had an ultimate tensile strength of 470 MPa. After T4 treatment, the material had an ultimate tensile strength of 590 MPa. The tensile strengths of nanocrystalline Al-Cu-Mg alloy were higher than conventional Al-Cu- Mg alloy. The reasons for good mechanical properties of nanocrystalline Al-Cu-Mg alloy were found through microstructure analysis.

关 键 词：铝合金 纳米块体 低温球磨 力学性能 

分 类 号：TG115.5[金属学及工艺—物理冶金]