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<p>Stainless steel 316 L components are manufactured by using the laser powder bed fusion (LPBF) technique because it allows for customization and short production lead times. 316 L materials are used in the medical industry, specifically in the manufacturing of bone screws and bone plates. Because of alloying elements like nickel and chromium, this material is well known for being corrosion resistant and biocompatible. However, improving its fatigue resistance is crucial to guaranteeing its fitness for biomedical applications, particularly when subjected to body loading circumstances. A common mechanical surface treatment, shot peening, was used to improve fatigue performance in a variety of surface conditions, including the un-shot peened sample (AB) and shot peened samples treated for six, eight, and ten minutes (A, B, and C). Surface roughness was decreased by about 25–30% in all shot-peened specimens when compared to the untreated AB sample. Samples A, B, and C showed the highest surface hardness values, measuring 384.5 ± 1.3 Hv, 395.7 ± 5.8 Hv, and 382.1 ± 2.9 Hv, respectively, compared to the AB sample's 285.4 ± 3.5 Hv. The surfaces of shot-peened samples exhibited better fatigue resistance and compressive residual stresses in comparison to their untreated samples. Shot peening also increased microstrain and dislocation density while decreasing crystallite size. Tribological studies revealed that sample B showed an average coefficient of friction of 0.404 ± 0.019, while the AB sample resulted in a coefficient of friction of 0.471 ± 0.035.</p> Graphical Abstract <p></p>

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Shot Peening Effects on the Surface and Structural Characterization, Fatigue Performance and Tribological Behavior of Additive Manufactured Stainless Steel 316L Features

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • G. MariyaDas,
  • B. Vishnu Vardhana Naidu

摘要

Stainless steel 316 L components are manufactured by using the laser powder bed fusion (LPBF) technique because it allows for customization and short production lead times. 316 L materials are used in the medical industry, specifically in the manufacturing of bone screws and bone plates. Because of alloying elements like nickel and chromium, this material is well known for being corrosion resistant and biocompatible. However, improving its fatigue resistance is crucial to guaranteeing its fitness for biomedical applications, particularly when subjected to body loading circumstances. A common mechanical surface treatment, shot peening, was used to improve fatigue performance in a variety of surface conditions, including the un-shot peened sample (AB) and shot peened samples treated for six, eight, and ten minutes (A, B, and C). Surface roughness was decreased by about 25–30% in all shot-peened specimens when compared to the untreated AB sample. Samples A, B, and C showed the highest surface hardness values, measuring 384.5 ± 1.3 Hv, 395.7 ± 5.8 Hv, and 382.1 ± 2.9 Hv, respectively, compared to the AB sample's 285.4 ± 3.5 Hv. The surfaces of shot-peened samples exhibited better fatigue resistance and compressive residual stresses in comparison to their untreated samples. Shot peening also increased microstrain and dislocation density while decreasing crystallite size. Tribological studies revealed that sample B showed an average coefficient of friction of 0.404 ± 0.019, while the AB sample resulted in a coefficient of friction of 0.471 ± 0.035.

Graphical Abstract