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Investigation on Microstructure and Microtexture of Laser-Welded 2A97-T3 Al-Li Alloys by EBSD
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Affiliation:

1.Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China;2.China Aeronautical Manufacturing Technology Research Institute, Beijing 100124, China;3.University Lille, CNRS, INRAE, Centrale Lille, Lille F-59000, France

Clc Number:

TG456.7

Fund Project:

Supported by Project (614290801051809)

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    Abstract:

    The laser-welded 2A97-T3 aluminum-lithium (Al-Li) alloy joints were sampled from upper horizontal surface, transverse section, longitudinal section, and lower horizontal surface to develop the comprehensive and spatial understandings for microstructure and microtexture evolution. Various characterization methods in terms of electron backscattered diffraction such as orientation imaging microscopy, pole figure, inverse pole figure, misorientation angles distribution, orientation distribution function, and numerical simulation were used. The results show obvious differences in the grain morphology, orientation, and microtexture in different areas of the joint, due to the nonequilibrium characteristic of cold rolling and laser beam welding. The laser beam can induce the formation and growth of dynamic recrystallization and sub-structure grains in the heat affected zone. Moreover, the original microtexture characteristics of the base metal is weakened and thus eliminated in both the heat affected zone and the weld zone.

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[Shao Yingkai, Li Xiaoyan, Chen Li, Ji Gang. Investigation on Microstructure and Microtexture of Laser-Welded 2A97-T3 Al-Li Alloys by EBSD[J]. Rare Metal Materials and Engineering,2022,51(12):4464~4474.]
DOI:10.12442/j. issn.1002-185X.20220074

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History
  • Received:January 24,2022
  • Revised:December 01,2022
  • Adopted:March 10,2022
  • Online: January 11,2023
  • Published: December 30,2022