Mechanism of Ta on the microstructure and properties of Fe-Mn damping alloys  

作　　者：Gui-Xiang Liu Kun Zhang Chao Han Xiao-Lin Shao Jun Lu Lin Zhang Xiao-Song Jiang Zi-Xuan Wu Liu Yang 

机构地区：[1]The Second Sub-Institute,Nuclear Power Institute of China,Chengdu,610213,China [2]Key Laboratory of Advanced Technologies of Materials,Ministry of Education,Chengdu,610031,China [3]School of Materials Science and Engineering,Southwest Jiao tong University,Chengdu,610031,China [4]School of Engineering and Materials Science,Queen Mary University of London,London,E14NS,UK [5]Institute for Applied Materials(IAM-WK),Karlsruhe Institute of Technology(KIT),76131,Karlsruhe,Germany

出　　处：《Tungsten》2024年第4期767-777,共11页钨科技（英文）

基　　金：supported by the Key Labora tory of Infrared Imaging Materials and Detectors,Shanghai Insti tute of Technical Physics,Chinese Academy of Sciences(No.IIM DKFJJ-21-10);China Postdoctoral Science Foundation(No 2018T110993)。

摘　　要：Fe-Mn-Co-xTa alloys(x=0,1,2,3 wt.%)were fabricated using spark plasma sintering to explore the influence of Ta content on the microstructure,mechanical properties,and damping characteristics of Fe-17Mn-3Co damping alloys.The micro structural analysis reveals the dominant presence ofγ-austenite,ε-martensite,α'-martensite,and Co_(3)Ta precipitates within the alloy.Incremental increments in Ta content exhibit proportional enhancements in hardness,tensile strength,and fracture elongation of the alloy.Notably,these improvements in mechanical attributes are closely correlated with the generated second-phase Co_(3)Ta.As the Ta content increases,there is a gradual augmentation in the formation of Co_(3)Ta within the alloy.Consequently,the damping property initially experiences an ascent followed by a subsequent decline with rising Ta content.This damping behavior finds its origins in multiple mechanisms,including grain boundary damping stemming from reduced grain size,interfacial damping induced by the generated Co_(3)Ta,and dislocation damping.It is noteworthy that the emergence of the secondary phase wields a dual impact on damping property.On the one hand,the proliferation of the second phase fosters increased interfaces for energy dissipation.On the other hand,these interfaces give rise to compressive stresses,constraining interface movement and thus impeding damping property enhancement.

关 键 词：Fe-Mn-Co TA Spark plasma sintering Mechanical properties DAMPING 

分 类 号：TG132[一般工业技术—材料科学与工程]