The effect of using repetitively pulsed laser radiation in selective laser melting when creating a metal-matrix composite Ti-6Al-4V–B4C

Alexander Golyshev,Anatoliy Orishich,Alexei Ancharov,Mikhail Gulov,Alexander Malikov

doi:10.1007/s00170-021-07842-5

Abstract

A metal-matrix composite based on Ti-6Al-4V–B4C with TiB, TiB2 and TiC inclusions was successfully obtained as a result of in situ synthesis using repetitively pulsed laser radiation. For the first time, the phase composition of the obtained metal-matrix composite was studied using synchrotron radiation. A comparison of the effect of using continuous and pulsed-periodic radiation in selective laser melting on the microstructure and mechanical properties of coatings was made. The use of repetitively pulsed radiation made it possible to form more uniform structures and to improve the mechanical properties of metal-matrix coatings in comparison with the continuous mode of exposure. It has been established that the use of repetitively pulsed radiation and the formation of TiB2, TiB, TiC phases made it possible to increase the wear resistance of the formed composite by a factor of 6 in comparison with the Ti-6Al-4V metal coating.

Highlights

Additive technologies (AT) of parts manufacturing are entering the industrial level today
The results showed that, under vibration exposure, vibration movement occurs for a smaller critical temperature difference, which is associated with the influence of vibrations on the shape of the free surface
It is fundamentally important that all the products indicated in reactions (1 - 4) are observed using a transmission phase analysis by synchrotron radiation and the total level of signal intensity from the signal of reflections of the created phases is of the order of or exceeds the reflection from the α-Ti matrix, i.e. most of the titanium reacted with B4C to form various ceramic particles

Summary

Introduction

Additive technologies (AT) of parts manufacturing are entering the industrial level today. Sintered composites based on B4C, TiC, TiB, TiB2 ceramics and titanium metal binder have demonstrated good performance due to their high compatibility, high melting point, extreme hardness, excellent wear resistance and corrosion resistance, combined with excellent fracture toughness[12,13,14,15,16,17]. These composites are mainly obtained by hot pressing or casting. One of the main problems in the production of metal-matrix composites is to ensure the physicochemical compatibility of the matrix and the reinforcing phase

Results

Discussion

Conclusion