In this study, AlSi10Mg powders with average diameters of 44 μm are additively manufactured into bulk samples using a selective laser melting (SLM) process. Post-heat treatment to reduce residual stress in the as-synthesized sample is performed at different temperatures. From the results of a tensile test, as the heat-treatment temperature increases from 270 to 320oC, strength decreases while elongation significantly increases up to 13% at 320oC. The microstructures and tensile properties of the two heat-treated samples at 290 and 320oC, respectively, are characterized and compared to those of the as-synthesized samples. Interestingly, the Si-rich phases that network in the as-synthesized state are discontinuously separated, and the size of the particle-shaped Si phases becomes large and spherical as the heat-treatment temperature increases. Due to these morphological changes of Si-rich phases, the reduction in tensile strengths and increase in elongations, respectively, can be obtained by the post-heat treatment process. These results provide fundamental information for the practical applications of AlSi10Mg parts fabricated by SLM.

Abstract
1. 서 론
2. 실험방법
    2.1. 적층제조 및 열처리
    2.2. 분석방법
3. 결과 및 고찰
3. 결 론
References

• 남정우(한국재료연구원 3D프린팅재료연구실/경북대학교 신소재공학부) | Jung-woo Nam (Department for 3D Printing Materials, Korea Institute of Materials Science/Department of Metallurgical Engineering, Kyungpook National University)
• 엄영성(한국재료연구원 3D프린팅재료연구실/경북대학교 신소재공학부) | Yeong Seong Eom (Department for 3D Printing Materials, Korea Institute of Materials Science/Department of Metallurgical Engineering, Kyungpook National University)
• 김경태(한국재료연구원 3D프린팅재료연구실) | Kyung Tae Kim (Department for 3D Printing Materials, Korea Institute of Materials Science) Corresponding Author
• 손인준(경북대학교 신소재공학부) | Injoon Son (Department of Metallurgical Engineering, Kyungpook National University)