Multimodal element(including lithium)mapping in a Mg-9Li-4Al-1Zn alloy  

作　　者：Yu Zhang Yang Liu Zhuoran Zeng Nick Birbilis Philip N.H.Nakashima Laure Bourgeois 

机构地区：[1]Department of Materials Science and Engineering,Monash University,VIC 3800,Australia [2]Monash Centre for Electron Microscopy,Monash University,VIC 3800,Australia [3]College of Materials Science and Engineering,Hunan University,Changsha 410082,China [4]State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle,Hunan University,Changsha 410082,China [5]Suzhou Research Institute of Hunan University,Suzhou 215131,China [6]Faculty of Science,Engineering and Built Environment,Deakin University,VIC 3125,Australia

出　　处：《Journal of Magnesium and Alloys》2024年第11期4468-4480,共13页镁合金学报(英文)

基　　金：Australian Research Council(ARC)for the financial support of this work(Grant No.DP190103592);funded by ARC grants LE110100223(FEI F20),LE0454166(FEI Titan3),LE170100118(Thermo Scientific Spectra-φ),and LE200100132(Thermo Scientific Helios)。

摘　　要：Determining the distribution of alloying elements,particularly lithium,is crucial for a holistic understanding of magnesium-lithium-based alloys.In this work,a bespoke ratio spectrum-imaging method based on electron energy-loss spectroscopy,in combination with time-of-flight secondary ion mass spectrometry,energy-dispersive X-ray spectroscopy and Z-contrast imaging,was applied to an as-rolled LAZ941 alloy(Mg-9Li-4Al-1Zn in wt.%).This was done to characterize the distribution of alloying elements,including the distribution of solute in the magnesium matrix.The applications of different mapping techniques revealed that precipitates with two different morphologies are rich in Li,Al and Zn,compared to their surrounding matrix.Additionally,it was confirmed that theβ-phase of the alloy contains higher Li and lower Mg concentrations when compared to theα-phase.This study demonstrated the effectiveness and accuracy of the ratio spectrum-imaging method for mapping the elemental distribution(including lithium)in a range of Li-containing materials.

关 键 词：Magnesium alloys Lithium distribution mapping Solute content mapping Phase determination Electron energy-loss spectroscopy(EELS) Time-of-flight secondary ion mass spectrometry(ToF-SIMS) Scanning transmission electron microscopy(STEM) 

分 类 号：TG146.22[一般工业技术—材料科学与工程]