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首页> 外文期刊>Materials Science and Engineering >Effect of the structure and the phase composition on the mechanical properties of Al-Cu-Li alloy laser welds
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Effect of the structure and the phase composition on the mechanical properties of Al-Cu-Li alloy laser welds

机译：结构与相组合物对Al-Cu-Li合金激光焊接机械性能的影响

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摘要

The purpose of these investigations was to study the effect of heat treatment on the structure and the phase composition of laser welded joints of the Al-2.8Cu-1.7Li alloy (V-1461 grade), providing the maximum tensile strength. To study the phase composition of the weld metal, synchrotron radiation was applied using a 'Mega Science' facility. This enabled to assess the phase distribution across the weld metal before and after heat treatment. It was found using high-resolution scanning and transmission electron microscopy, energy dispersive X-ray analysis, and synchrotron X-ray diffractometry that the T_1(Al_2CuLi) and T_2(Al_6CuLi_3) main phases had been formed in the weld metal and at the interfaces with the matrix. Ultimate tensile strength of the welded joints was about 341 MPa, which was 62% of that of the base metal. Subsequent heat treatment of the welded samples, included hardening and artificial aging, caused the homogenization of the Al-Cu-Li alloy solid solution, as well as the formation of the δ'(Al_3Li) hardening phase. Also, the T_1 and T_2 phases were formed partially. After quenching, tensile strength of the welded joints improved and was about 85% of that of the base metal. After artificial aging, it was about 510 MPa and approached tensile strength of the base metal (93%).
机译：这些研究的目的是研究热处理对Al-2.8Cu-1.7LI合金（V-1461级）的激光焊接接头的结构和相位组成的影响，提供最大拉伸强度。为了研究焊接金属的相位成分，使用“兆科学”设施施用同步辐射。这使得能够在热处理前后焊接金属的相位分布进行评估。已经发现使用高分辨率扫描和透射电子显微镜，能量分散X射线分析和同步X射线衍射测定法，即T_1（AL_2CULI）和T_2（AL_6CULI_3）主要相在焊缝金属和界面处形成用矩阵。焊接接头的极限拉伸强度为约341MPa，其基础金属的62％。随后的焊接样品的热处理，包括硬化和人工老化，导致Al-Cu-Li合金固体溶液的均质化，以及形成δ'（Al_3li）硬化相。而且，部分地形成T_1和T_2相。在淬火后，焊接接头的拉伸强度改善并为贱金属的约85％。在人工老化后，它是约510MPa并接近贱金属的拉伸强度（93％）。

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  • 来源
    《Materials Science and Engineering》 |2021年第30期|140947.1-140947.16|共16页
  • 作者

    Alexander Malikov; Anatoliy Orishich; Igor Vitoshkin; Natalia Bulina; Evgenij Karpov; Anton Gutakovskii; Stepan Batsanov; Alexey Ancharov; Roman Tabakaev;

  • 作者单位

    Khristianovich Institute of Theoretical and Applied Mechanics Siberian Branch Russian Academy of Sciences Institutskaya Str. 4/1 Novosibirsk 630090 Russia;

    Khristianovich Institute of Theoretical and Applied Mechanics Siberian Branch Russian Academy of Sciences Institutskaya Str. 4/1 Novosibirsk 630090 Russia;

    Khristianovich Institute of Theoretical and Applied Mechanics Siberian Branch Russian Academy of Sciences Institutskaya Str. 4/1 Novosibirsk 630090 Russia;

    Institute of Solid State Chemistry and Mechanochemistry Siberian Branch Russian Academy of Sciences Kutateladze Str. 18 Novosibirsk 630128 Russia;

    Khristianovich Institute of Theoretical and Applied Mechanics Siberian Branch Russian Academy of Sciences Institutskaya Str. 4/1 Novosibirsk 630090 Russia Lavrentyev Institute of Hydrodynamics Siberian Branch Russian Academy of Sciences Lawentyev Ave. 15 Novosibirsk 630090 Russia;

    Rzhanov Institute of Semiconductor Physics Siberian Branch of Russian Academy of Sciences 13 Lavrentiev Aven Novosibirsk 630090 Russia;

    Rzhanov Institute of Semiconductor Physics Siberian Branch of Russian Academy of Sciences 13 Lavrentiev Aven Novosibirsk 630090 Russia;

    Institute of Solid State Chemistry and Mechanochemistry Siberian Branch Russian Academy of Sciences Kutateladze Str. 18 Novosibirsk 630128 Russia Budker Institute of Nuclear Physics of Siberian Branch Russian Academy of Sciences 44 Acad. Lavrentieva Pr 630090 Russia;

    School of Energy & Power Engineering National Research Tomsk Polytechnic University Lenin Av. 30 Tomsk 634050 Russia;

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  • 关键词

    Laser welding; Aluminum-lithium alloy; Structure; Phase analysis; High resolution electron microscopy; Synchrotron X-ray diffractometry;

    机译：激光焊接;铝锂合金;结构;阶段分析;高分辨率电子显微镜;同步X射线衍射法;

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