Cu_(73)Al_(17)Mn_(10)形状记忆合金的显微组织和阻尼性能  

Microstructures and Damping Properties of Cu_(73)Al_(17)Mn_(10) Shape Memory Alloy

作　　者：赵新娥[1] 张平 杨猛[1] 魏洁[1] 赵相玉[1] 马立群[1] 孔意涵 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009 [2]山东临工工程机械有限公司,山东临沂276000

出　　处：《有色金属工程》2015年第4期13-16,共4页Nonferrous Metals Engineering

基　　金：江苏省六大人才高峰项目(2012-XCL-034)

摘　　要：研究热处理及变形对Cu73Al17Mn10形状记忆合金显微组织和阻尼性能的影响。结果表明,合金在铸态下主要为L21结构的β母相组织,经时效热处理后,转变为板条状马氏体。在室温下,该合金的低应变阻尼为弛豫型阻尼,高应变阻尼为静滞后型阻尼。均匀化退火后合金的内耗低于铸态。经轧制变形后,晶粒得到细化,有利于阻尼性能的提高。时效处理后,板条状马氏体变细,合金的阻尼性能得到进一步提高。The effects of heat-treatment and deformation on the microstructure and damping properties of Cu73Al17Mn10 shape memory alloy are investigated. The results show that the microstructrure of the Cu73Al17Mn10 shape memory alloy is mainly the L21 parent phase in the as-cast condition,and is converted to the lath type of martensite by the aging treatment. The damping of the alloy is the relaxation internal friction at low stain amplitude,and the static hysteresis internal friction at high stain amplitude.The internal friction for annealed alloy is smaller than that for as-cast. The grain sizes are decreased by cold rolling,and the internal friction is improved. The thickness of martensite plates is decreased by aging treatment,so the internal friction is increased.

关 键 词：形状记忆合金 热处理 显微组织 阻尼性能 

分 类 号：TG139.6[一般工业技术—材料科学与工程] TG113.12[金属学及工艺—合金]