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2A97-T3鋁鋰合金激光焊接接頭微觀組織與織構(gòu)的EBSD研究
作者:
作者單位:

1.北京工業(yè)大學(xué) 材料與制造學(xué)部，北京 100124;2.中國(guó)航空制造技術(shù)研究院，北京 100124;3.里爾大學(xué) 法國(guó)國(guó)家科學(xué)研究中心 國(guó)立農(nóng)業(yè)、食品和環(huán)境研究所 中央理工大學(xué)，法國(guó) 里爾 F-59000

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

TG456.7

基金項(xiàng)目:

高能束流加工技術(shù)國(guó)防科技重點(diǎn)實(shí)驗(yàn)室基金


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

Fund Project:

Supported by Project (614290801051809)

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    摘要:

    從2A97-T3鋁鋰合金激光焊接頭的上水平面、橫截面、縱截面和下水平面進(jìn)行取樣，對(duì)接頭的微觀組織和織構(gòu)進(jìn)行了分析。利用電子背散射衍射（EBSD）技術(shù)的多種表征方法，如OIM、PF、IPF、取向角分布、ODF、晶粒形貌圖，并結(jié)合激光焊過(guò)程的數(shù)值模擬，研究了激光焊作用下接頭微觀組織的演變機(jī)理。結(jié)果表明，由于薄板冷軋工藝和激光焊加工的非平衡特性，導(dǎo)致接頭不同截面的晶粒形態(tài)、取向和微觀織構(gòu)存在明顯差異。這種組織的不均勻性是接頭性能各向異性的根本來(lái)源。因此，有必要對(duì)接頭的不同截面進(jìn)行分析，進(jìn)而對(duì)微觀組織和織構(gòu)獲得全面性和空間性的認(rèn)識(shí)。激光誘導(dǎo)下，熱影響區(qū)發(fā)生了動(dòng)態(tài)再結(jié)晶和亞結(jié)構(gòu)晶粒的形成和長(zhǎng)大，焊縫區(qū)則產(chǎn)生了微觀組織的重熔現(xiàn)象，該過(guò)程會(huì)導(dǎo)致母材原有織構(gòu)特征在熱影響區(qū)減弱、在焊縫區(qū)消失。

    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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引用本文

邵盈愷,李曉延,陳俐,嵇罡.2A97-T3鋁鋰合金激光焊接接頭微觀組織與織構(gòu)的EBSD研究[J].稀有金屬材料與工程,2022,51(12):4464~4474.[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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歷史
  • 收稿日期:2022-01-24
  • 最后修改日期:2022-12-01
  • 錄用日期:2022-03-10
  • 在線發(fā)布日期: 2023-01-11
  • 出版日期: 2022-12-30