Microstructure and Mechanical Properties of Laser Welded Joints of 15% SiC<sub>p</sub> /2A14 Aluminum Matrix Composites

XU Fei; GAO Wenqiang; GONG Yue; YANG Jing

doi:10.16080/j.issn1671-833x.25020356

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Microstructure and Mechanical Properties of Laser Welded Joints of 15% SiC_p /2A14 Aluminum Matrix Composites

RESEARCH | 更新时间：2026-06-16

- Microstructure and Mechanical Properties of Laser Welded Joints of 15% SiC_p /2A14 Aluminum Matrix Composites
- Aeronautical Manufacturing Technology Vol. 69, Issue 10, Pages: 112-118(2026)
- 作者机构：
  
  中国航空制造技术研究院，北京 100024
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.25020356
  CLC： V252;TG456.7
- Received：07 November 2025，
  
  Revised：2025-12-10，
  
  Accepted：08 January 2026，
  
  Published：15 May 2026
- 稿件说明：
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引文格式：许飞，高文强，巩玥，等.15% SiCp /2A14铝基复合材料激光焊接接头组织性能调控[J].航空制造技术，2026, 69（10）：25020356.

XU Fei, GAO Wenqiang, GONG Yue, et al. Microstructure and mechanical properties of laser welded joints of 15% SiCp / 2A14 aluminum matrix composites[J]. Aeronautical Manufacturing Technology, 2026, 69(10): 25020356.
引文格式：许飞，高文强，巩玥，等.15% SiCp /2A14铝基复合材料激光焊接接头组织性能调控[J].航空制造技术，2026, 69（10）：25020356. DOI： 10.16080/j.issn1671-833x.25020356.

XU Fei, GAO Wenqiang, GONG Yue, et al. Microstructure and mechanical properties of laser welded joints of 15% SiCp / 2A14 aluminum matrix composites[J]. Aeronautical Manufacturing Technology, 2026, 69(10): 25020356. DOI： 10.16080/j.issn1671-833x.25020356.

摘要

为抑制SiC颗粒增强铝基复合材料熔化焊过程中易生成的Al

针状脆性相和气孔缺陷，提高其焊接结构的工程应用价值，开展了不同厚度Ti箔夹层状态的2 mm厚、SiC体积分数15%的SiC

/2A14铝基复合材料激光对接焊。结果表明，夹置一定厚度的Ti箔对改善母材的焊缝质量效果显著；焊缝区可分为焊缝中心的“新生相富集区”和远离焊缝中心的“混合区”，随着Ti箔夹层厚度的增加，“新生相富集区”中Al

针状脆性相的含量逐渐减少，而新生相TiC的含量逐渐增多，且TiC的形态逐渐由弥散分布的颗粒状转变为片状或网状，焊接接头的拉伸性能呈现出先增长后下降的趋势。当Ti箔夹层厚度为0.05 mm时，SiC

/2A14铝基复合材料激光焊接接头的焊态拉伸性能最好，其平

均抗拉强度为263 MPa，强度系数达到77%，平均断后伸长率为1.7%，断口呈现为以脆性解理断裂为主的混合断裂特征。

Abstract

To suppress the formation of Al

needle-like brittle phase and porosity defects that are prone to occur during the melting welding of SiC particle reinforced aluminum matrix composites and enhance the engineering application value of their welded structures

laser butt welding of 2 mm thick SiC

/2A14 aluminum matrix composites with SiC volume fraction of 15% and different thicknesses of Ti foil interlayer were carried out. The results show that the interposition of Ti foil of a certain thickness has a significant effect on improving the weld quality of the base material. The weld zone can be divided into the “newly born phases enrichment zone” at the center of the weld and the “mixed zone” away from the center of the weld. With the increase of the thickness of the Ti foil interlayer

the content of the Al

needle-like brittle phase in the “newly born phases enrichment zone” gradually decreases

while the content of the new phase TiC gradually increases

and the morphology of TiC gradually changes from dispersed particles to plate-like or network-like. Meanwhile

the tensile properties of the welded joint show a trend of first increasing and then decreasing. When the thickness of Ti foil interlayer is 0.05 mm

the tensile properties of the laser welded joint of SiC

/2A14 aluminum matrix composites in the as-welded state are the best. The average tensile strength is 263 MPa

the strength coefficient reaches 77%

and the average elongation after fracture is 1.7%. The fracture surface shows a mixed fracture feature mainly characterized by brittle cleavage fracture.

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Microstructure and Mechanical Properties of Laser Welded Joints of 15% SiCp /2A14 Aluminum Matrix Composites

DOI：10.16080/j.issn1671-833x.25020356

摘要

Abstract

关键词

Keywords

references

Microstructure and Mechanical Properties of Laser Welded Joints of 15% SiC_p /2A14 Aluminum Matrix Composites