A novel method of nondestructive characterization via X-ray and high-speed imaging of TiC/IN718 composite materials manufactured by LMD

Abstract

In this study, IN718 alloys with TiC particulate content between wt.% 0÷15 were fabricated by Laser Melting Deposition (LMD). Increasing the ceramic reinforcement content in the metal matrix composites (MMC), the Laves phase decreased, while the hardness value reached up to 393 ± 4.3 HV0.2. Uniform distribution of TiC in the IN718 matrix were obtained. The geometric characteristics of the MMC depositions and the distribution behavior of unmelted TiC particles were assessed via X-Ray computerized tomography. Furthermore, the width of the deposited samples was correlated with the fluctuation of the melt pool area recorded by high-speed imaging. Laser melting deposition of a metal matrix composite made of IN718/TiC microparticles was studied with the purpose of 3D printing a pilon bracket of an airplane turbofan.

Keywords

• Metal matrix composite
• Laser Melting Deposition
• X-ray characterization
• Pilon bracket