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Alloying of surface layers could be recently improved by using the laser deep alloying process. For this, a highly focused laser beam is guided on the material surface producing a wide and deep melt pool. Alloying particles are applied as a powder using a powder nozzle. This process allows deep alloying and dispersing of particles. The homogeneity and the penetration depth of the particles in the melt pool vary when using particles with different thermo-physical properties. Therefore, the influence of particle properties, feeding rates and modulation strategies of the laser on the resulting distribution in the weld pool is studied in this work. The modulation strategy and the feeding rate have a minor impact on particle distribution within the observed parameter field. Particle entering and distribution depend mainly on its density and wetting behavior with aluminum. Most homogeneous distribution has been found using TiB2-particles

Particle Property Impact on its Distribution During Laser Deep Alloying Processes