Kang Cheol, Kim Gun-Hee, Kim Won Rae, Lee Taeg Woo, Kang Hyun Soo, Ham Min Ji, Choi Seon-Jin, Choi Hye Yoon, Kim Ki-Seung, Kim Hyo Tae, Kim Hyung Giun
Functional Materials and Components R&D Group, Korea Institute of Industrial Technology, Gangeung, 25440, Republic of Korea.
Division of Materials Science and Engineering, Hanyang University, Seoul, 04763, Republic of Korea.
Heliyon. 2024 Oct 18;10(20):e39522. doi: 10.1016/j.heliyon.2024.e39522. eCollection 2024 Oct 30.
The correlation between surface roughness and energy density in the down surface area of AlSi10Mg alloy manufactured by selective laser melting was analyzed. This study investigated the relationship between the contour melt pool shape and surface roughness in the down surface area across an energy density range of 10-150 J/mm³. As the energy density increased, the contour melt pool in the down surface area became more stable, which significantly influenced surface roughness. Low energy density resulted in the unstable formation of the contour melt pool, leading to a deterioration in surface quality, whereas high energy density promoted the stable formation of the melt pool. Sufficient energy density is essential for the complete formation of the contour melt pool on the down surface, which plays a crucial role in reducing surface roughness. However, within the energy density range where the contour melt pool is fully formed, keyhole defects may occur, and it can be anticipated that these defects may worsen at energy densities exceeding the critical threshold.
分析了选择性激光熔化制造的AlSi10Mg合金下表面区域的表面粗糙度与能量密度之间的相关性。本研究在10-150 J/mm³的能量密度范围内，研究了下表面区域轮廓熔池形状与表面粗糙度之间的关系。随着能量密度的增加，下表面区域的轮廓熔池变得更加稳定，这对表面粗糙度有显著影响。低能量密度导致轮廓熔池形成不稳定，导致表面质量恶化，而高能量密度促进熔池的稳定形成。足够的能量密度对于下表面轮廓熔池的完全形成至关重要，这对降低表面粗糙度起着关键作用。然而，在轮廓熔池完全形成的能量密度范围内，可能会出现匙孔缺陷，可以预期这些缺陷在超过临界阈值的能量密度下可能会恶化。
