高强阻尼铝合金轧制板材的组织与性能  

Microstructure and Properties of High Strength-Damping Rolled Aluminium Sheet

作　　者：李伟[1] 李沛勇[1] 何晓磊[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《金属功能材料》2009年第6期11-14,共4页Metallic Functional Materials

摘　　要：采用气体雾化/粉末冶金（RS P/M）工艺研制Al-9.0Zn-2.5Mg-2.0Cu-0.1Ni-0.1Zr/Zn-30%Al（LZ7）高强阻尼铝合金,经挤压、轧制成5.0 mm板材。详细观察LZ7板材轧制和双重时效（T7态）两种状态下的组织,并测试了T7态室温拉伸性能和阻尼性能。结果发现：采用快速凝固气体雾化制备的LZ7合金主要强化相有η′相和η相;LZ7金属基复合材料具有较好的阻尼性能,室温-250℃,LZ7合金的阻尼性能为6.0×10-3-24.52×10-3;室温下：0σ.2〉465 MPa,σb〉490 MPa,5δ〉6.0%。Al-9.0Zn-2.5Mg-2.0Cu-0.1Ni-0.1Zr /Zn-30Al（LZ7） sheet was produced by rapidly solidified/powder metallurgy（RS P/M） and followed by extrusion and rolling process.The microstructure of rolled LZ7-and LZ7-T7 was observed by SEM、X-ray and TEM.The room-temperature tensile properties and damping capacity of LZ7-T7 were investigated at the same time.The results show there are two main strength phases in LZ7 alloy： η′ and η.LZ7 alloy owns the good damping capacity.The damping capacity of LZ7 is 6.0×10-3-24.52×10-3 between room temperature and 250 ℃. At room temperature： σ0.2〉465 MPa, σb〉490 MPa, δ5〉6.0%.

关 键 词：快速凝固/粉末冶金 高强阻尼铝合金 微观组织 拉伸性能 阻尼性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]