The Influence of Sample Thickness on the Bending Fatigue Performance of PBF-Lb 316L Material

Key Engineering Materials Pub Date : 2024-07-03 DOI:10.4028/p-336eCO

T. Rautio, Eloïse Roux, M. Jaskari, Aappo Mustakangas, M. Keskitalo, M. Hietala, A. Järvenpää

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Abstract

Additive manufacturing, specifically Laser Powder Bed Fusion (PBF-LB), has gained prominence for its capability to produce complex near-net-shaped components. While PBF-LB offers advantages such as lightweight construction and cost-effectiveness, post-processing remains crucial to meet specific design requirements. This study investigates the post-processing technique of severe shot peening (SSP) on PBF-LB-manufactured 316L stainless steel, a material widely used for its favorable mechanical properties and corrosion resistance. The research focuses on the enhancement of bending fatigue properties through SSP treatment, examining the influence of material thickness on fatigue behavior. Comparative analysis reveals the effectiveness of SSP in significantly improving fatigue strength irrespective of variations in material thickness. Mechanical properties are explored for different thicknesses subjected to SSP treatment. Electron Backscatter Diffraction (EBSD) is employed to scrutinize the surface properties of the samples, providing knowledge on the microstructural changes induced by SSP. The study contributes to the understanding of the role of material thickness in the context of SSP treatment, offering a comprehensive exploration of the mechanical and fatigue characteristics of PBF-LB-manufactured 316L stainless steel.

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试样厚度对 PBF-Lb 316L 材料弯曲疲劳性能的影响

快速成型技术，特别是激光粉末床熔融技术（PBF-LB），因其能够生产复杂的近网状部件而备受瞩目。虽然 PBF-LB 具有轻质结构和成本效益等优势，但要满足特定的设计要求，后处理仍然至关重要。本研究探讨了对 PBF-LB 制造的 316L 不锈钢进行严重喷丸强化 (SSP) 的后处理技术，这种材料因其良好的机械性能和耐腐蚀性能而被广泛使用。研究重点是通过 SSP 处理提高弯曲疲劳性能，并考察材料厚度对疲劳行为的影响。对比分析表明，无论材料厚度如何变化，SSP 都能有效地显著提高疲劳强度。研究还探讨了经 SSP 处理的不同厚度材料的机械性能。电子反向散射衍射 (EBSD) 被用来仔细检查样品的表面特性，提供有关 SSP 引起的微观结构变化的知识。该研究有助于理解材料厚度在 SSP 处理中的作用，并对 PBF-LB 制造的 316L 不锈钢的机械和疲劳特性进行了全面探讨。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Key Engineering Materials

CiteScore

1.00

自引率

0.00%

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