Thermal Model and Numerical Simulation of Selective Laser Alloying Process of Elemental Ti and B

Wenlin Ye; Yuan Tian; Dan Zhou; Peisheng Li; Jie Lei; Ying Zhang

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자료유형: 학술저널

저자정보: Wenlin Ye (Nanchang University) Yuan Tian (De Montfort University) Dan Zhou (Loughborough University) Peisheng Li (Nanchang University) Jie Lei (Nanchang University) Ying Zhang (Nanchang University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.8

발행연도: 2021.1

수록면: 2,791 - 2,808 (18page)

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TiB2 has excellent performances in terms of wear resistance and corrosion resistance, mechanical strength, high elasticmodulus and high compressive strength, hardness, but its application is still limited due to its poor manufacturability. It isexpected to provide a transforming technology for its application by implementing additive manufacture of TiB2. The maincontent of this paper is to propose an innovative technology, selective laser alloying (SLA), using elemental powders ofTitanium and Boron provides a transforming technology for the application of TiB2by enabling its 3D forming from a puresimulation perspective. In this paper, a model of the in-situ reaction process is proposed. By considering the concentrationdistribution of Ti, B and TiB2,the effects of chemical reaction rate and laser power on the evolution of the free solid–liquidinterface and species transport are discussed. The laser energy consumed in the SLA process and the energy released bythe chemical reaction were theoretically derived. It showed that the heat released from the exothermic reaction betweenTitanium and Boron is an important energy source which can reduce the energy input and help improve the manufacturingefficiency of the SLA process; the chemical reaction rate has a significant influence on the concentration distribution of Ti,B and TiB2;the volume and existence time of molten pool and the heat source of reaction strongly relies on the chemicalreaction rate and the laser power.

#Additive manufacturing (AM) · selective laser melting (SLM) · Selective laser alloying (SLA) · Titanium diboride · Finite element heat transfer model · Exothermic reaction

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