## 1 Introduction  
To increase the efficiency of gas turbines used in the industry, the turbine inlet temperature must be high [1]. Therefore, the turbine must be able to withstand a temperature high enough to accommodate the turbine inlet temperature. A material for turbine components that can be used at high operating temperatures is a nickel-based superalloy. Superalloys have been developed as a method of increasing temperature acceptance through various chemical compositions and casting methods [2; 3; 4]. In addition, research on film cooling technology that can increase the acceptance temperature is also being con-ducted. Film cooling technology is used as a method to prevent overheating of turbine components [5]. The film cooling hole consists of a large number of small diameters [6]. Since it is difficult to implement the design of the film cooling hole in the casting method, various studies on the manufacturing method have been carried out [7; 8]. Although it is difficult to fabricate turbine components with a good cooling mechanism using the conventional casting method, additive manufacturing (AM) can overcome this limitation. Among AM technologies, selective laser melting (SLM) is a technology that partially melts a powder to create a desired shape [9]. The advantage of SLM is that it can produce structures with complex shapes, such as thin walls or small holes, with the same mechanical properties as those obtained via conventional manufacturing methods. SLM technology not only can create complex shapes but can also produce special shapes that cannot be manufactured by conventional casting methods [10]. Various studies are being conducted on the mechanical properties of materials made with SLM. In materials manufactured using SLM, the anisotropy that occurs due to the effect of the growth of grains and the pores generated inside according to the AM method also affects the mechanical properties. [PERSON] et al. [11] found that the difference in elastic modulus, which is 1.5 times higher in the in-plane direction than in the cross-plane direction, and anisotropy occurs due to defects along the building direction using the nickel-based superalloy Inconel 625. [PERSON] et al. [12] showed that the mechanical properties vary according to the building direction because the energy density of the SLM affects the grain growth using the nickel-based superalloy Inconel 718. [PERSON] et al. [13] investigated that columnar grain growth of nickel-based superalloy Nimonic 263 affects difference in orientation of mechanical properties such as ductility and elastic modulus. In addition, [PERSON] et al. [14] conducted the Co28 Cr6 Mo alloy and showed a higher elastic modulus in the in-plane direction than in the cross-plane direction because pores prevented the growth of columnar grains. Studies on the thermal properties of materials manufactured with SLM were also conducted. [PERSON] et al. [15] found that the effective thermal conductivity is affected by the diameter of the metal powder, and that the thermal conductivity decreases as the porosity increases. [PERSON] et al. [16] demonstrated that the thermal conductivity of the Cu-Ni-Si alloy is higher in the cross-plane direction than in the in-plane due to the difference in scattering at the grain boundary. [PERSON] et al. [17] observed anisotropic thermal conductivity along the cross-plane and in-plane direction of AlSi10 Mg materials owing to the texture and pore distribution. In addition, they observed the increase in thermal properties after heat treatment. Furthermore, [PERSON] et al. [18] studied the thermal conductivity of AlSi10 MG with changing polar angle, scan speed, and hatch spacing of the building direction. From this study, they confirmed that the directions of the melt pool and the cellular structure caused a change in thermal conductivity according to the polar angle. In addition, they found that the cell size influences the thermal conductivity due to the change in energy density of the laser during synthesis.