Laser pulse alloying the surface of Ti-5.5Al-2Zr-1Mo-1V by boron carbide particles
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The laser alloying of the Ti-5.5Al-2Zr-1Mo-1V near alpha-titanium alloy surface by boron carbide particles was performed. The pulse laser radiation is melting the surface of specimen a near alpha-titanium alloy, while simultaneously feeding BC powder to alloying zone. The powerful impulse laser effect obtained microexplosion above surface of the sample. The powerful explosive acoustic wave above the sample surface accelerates particles boron carbide. The surface of titanium alloy where charged by carbide particles. The laser alloying to obtained partial melting of the powder particles of boron carbide and dilution with the molten bath on the surface of titanium alloy. The new phases of TiC, TiB, and TiB2 dendrites-shaped and fine-dispersed needles were formed. The microhardness and coefficient of friction of the alloyed surface of a titanium alloy was increased into 2 and 1.5 times respectively.
KeywordsLaser alloying Titanium alloy Tribological tests Boron carbide Microstructure
The authors are grateful to the Ministry of Education of the Russian Federation for supported research projects No. 9.3236.2017/4.6, grant of the President of the Russian Federation MK-3745.2019.8 and Russian Science Foundation 19-79-00039.
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