CAJ | 학술논문

研究大功率激光器焊接TiB2颗粒增强铝基复合材料时TiB2粒子的演变行为。采用X射线衍射(XRD)、扫描电镜(SEM)及能谱(EDS)分析焊缝内粒子的物相、热力学过程及形貌特征；同时对 TiB2和铝基体的界面反应进行讨论。结果表明：当 TiB2团簇尺寸大于激光光斑直径时，焊缝中部的 TiB2粒子会熔融在一起，较大尺寸的TiB2会发生断裂；当与铝熔体接触后，熔化后的TiB2粒子会与Al发生反应生成Al3Ti和AlB12，并且焊缝中部的界面反应比焊缝边缘的剧烈。
연구대공솔격광기한접TiB2과립증강려기복합재료시TiB2입자적연변행위。채용X사선연사(XRD)、소묘전경(SEM)급능보(EDS)분석한봉내입자적물상、열역학과정급형모특정；동시대 TiB2화려기체적계면반응진행토론。결과표명：당 TiB2단족척촌대우격광광반직경시，한봉중부적 TiB2입자회용융재일기，교대척촌적TiB2회발생단렬；당여려용체접촉후，용화후적TiB2입자회여Al발생반응생성Al3Ti화AlB12，병차한봉중부적계면반응비한봉변연적극렬。
The evolution behavior of TiB2 particles was studied during laser welding on aluminum metal matrix composites (MMCs) reinforced with TiB2 particles by a high power laser. X-ray diffractometry (XRD), scanning electron microscopy (SEM) and energy spectrum analysis (EDS) were used to analyze the phase, thermodynamics and morphology characteristics of the particles in the weld seam, and the interface reactions between TiB2 particles and aluminum matrix were also discussed. The results show that partial TiB2 particles melt and merge into larger ones in the middle of the weld seam and that fracture can be found in larger particles when the scale of TiB2 cluster is larger than the spot size of laser. Al3Ti and AlB12 are produced by the interface reaction between TiB2 particles and Al matrix. The interface reaction of broken TiB2 particles in the middle of the weld seam is stronger than that at the edge of the weld seam.