Effect of chemically accelerated vibratory finishing on the corrosion behavior of Laser Powder Bed Fusion 316L stainless steel
Effect of chemically accelerated vibratory finishing on the corrosion behavior of Laser Powder Bed Fusion 316L stainless steel
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DOI：
10.1016/j.jmatprotec.2022.117596
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发表时间：
2022-07
影响因子：
6.3
通讯作者：
Stephanie Prochaska;O. Hildreth
中科院分区：
文献类型：
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作者：
Stephanie Prochaska;O. Hildreth
增材制造 (AM) 金属零件的竣工表面形态和纹理会降低其机械和腐蚀性能。一种化学加速振动精加工 (CAVF) 技术采用基于化学的逐步过程来逐渐消除表面粗糙度，而不需要大量的手动操作。虽然此过程可以有效地产生光滑表面，但所得表面的腐蚀反应尚不清楚。本研究评估了这种表面处理技术对使用激光粉末床熔融 (L-PBF) AM 技术制造的 316L 不锈钢的腐蚀响应和机理的影响。结果表明，CAVF 工艺不会明显改变微观结构，但会在表面施加残余压应力，与其他评估的样品相比，这会提高击穿潜力。此外，该工艺去除了热处理过程中形成的表面Cr3C2析出物。 CAVF 可改善表面光洁度和机械性能，并具有增强加工零件的腐蚀响应的额外优势。
As-built surface morphology and texture of Additively Manufactured (AM) metal parts reduce their mechanical and corrosion properties. One chemically accelerated vibratory finishing (CAVF) technique employs a chemically-based stepwise process to gradually remove surface roughness without the need for significant manual manipulation. While this procedure is effective at producing smooth surfaces, the corrosion response of the resulting surface is unknown. This study evaluates the effect of this surface finishing technique on the corrosion response and mechanisms of 316L stainless steel fabricated using Laser Powder Bed Fusion (L-PBF) AM techniques. The results show that the CAVF process does not obviously change the microstructure but imparts residual compressive stresses on the surface which improve the breakdown potential compared to other specimens evaluated. Further, the process removed surface Cr3C2precipitates formed during heat treatment. CAVF improves surface finish and mechanical properties with an added benefit of enhancing the corrosion response of processed parts.