*2.1. Experimental Equipment and Materials*

The SLM equipment used in this study is the Dimetal-100H device jointly developed by the additive manufacturing team of South China University of Technology and Laseradd Technology (Guangzhou, China) Co Ltd. The main equipment parameters were shown in Table 1. The materials used in this study were equiatomic NiTi50 powders and CuSn10 powders. Equiatomic NiTi50 powders were manufactured by Electrode Induction Melting Gas Atomization (EIGA) technology (Beijing Avimetal Powder Metallurgy Technology Co., Ltd., Beijing, China) and the particle size ranges from 15 to 53 µm (degree of sphericity ≈ 90%). CuSn10 powders were also manufactured by EIGA technology (Dongguan Hyper Tech Co Ltd., Dongguan, China) and the particle size ranges from 13 to 53 µm (degree of sphericity > 90%). Inductive Coupled Plasma Emission Spectrometer (ICP) was used to measure the chemical compositions which were listed in Tables 2 and 3. The scanning electron microscope (SEM) images (1000×) and particle size distributions of the powders were shown in Figure 1.

**Table 1.** Main equipment parameters of SLM Dimetal-100H device.





**Table 3.** Chemical composition of CuSn10 powder.

**Figure 1.** (**a**) SEM image of equiatomic NiTi50 powder (1000×); (**b**) particle size distribution for equiatomic NiTi50 powder; (**c**) SEM image of CuSn10 powder (1000×); (**d**) particle size distribution for CuSn10 powder.
