Scholarlink

<p>Powder bed fusion–laser beam (PBF-LB) is a reliable additive manufacturing (AM) process for fabricating layered, stepwise, functionally graded material (FGM). However, limited studies have explored compositionally graded FGMs specifically designed to tailor flexural performance for orthopedic load-bearing applications. In this study, flexural specimens with a compositionally graded layered structure made up of a 17-4 precipitate hardened (PH) stainless steel (SS) bottom layer, a Ni-625 middle layer, and a&#xa0;Ti-6Al-4&#xa0;V top layer, with individual layer thickness of 1.33&#xa0;mm, were fabricated using PBF-LB to investigate the maximum/ultimate flexural load (F). This work combines multi-material compositional grading and lattice-based infill strategies to optimize flexural performance for biomedical load-bearing applications. Using Taguchi analysis, the study examined the effects of three factors: linear energy density (LED), hatch distance (HD), and infill strategy. The results reveal that LED is the only statistically significant parameter (95% confidence level) governing the flexural performance of the graded structures. According to the selected PBF-LB process parameters, the Weaire–Phelan-based FGM flexural specimen exhibited a flexural load of 1120&#xa0;N, consistent with the reported ultimate load of String of Pearls (SOP) plates (939 ± 191&#xa0;N) for canine ilial fracture models. The result suggests that the fabricated prototype can closely mimic flexural loading conditions and effectively replicate the mechanical behavior of the canine ilial bone under lateral bending, making it applicable to orthopedic load-bearing conditions. The findings are validated by thermokinetic simulations and morphological characterization, including SEM/EDS, porosity analysis, and grain size measurement.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

On Tailored Flexural Response of Powder Bed Fusion–Laser Beam Fabricated Layered Composition-Gradient-Based Functionally Graded Materials for Biomedical Applications

  • 期刊论文

  • 发表日期：

    2026年5月23日

查看全文
  • Bharat Kalia,
  • Rupinder Singh,
  • B. S. Pabla

摘要

Powder bed fusion–laser beam (PBF-LB) is a reliable additive manufacturing (AM) process for fabricating layered, stepwise, functionally graded material (FGM). However, limited studies have explored compositionally graded FGMs specifically designed to tailor flexural performance for orthopedic load-bearing applications. In this study, flexural specimens with a compositionally graded layered structure made up of a 17-4 precipitate hardened (PH) stainless steel (SS) bottom layer, a Ni-625 middle layer, and a Ti-6Al-4 V top layer, with individual layer thickness of 1.33 mm, were fabricated using PBF-LB to investigate the maximum/ultimate flexural load (F). This work combines multi-material compositional grading and lattice-based infill strategies to optimize flexural performance for biomedical load-bearing applications. Using Taguchi analysis, the study examined the effects of three factors: linear energy density (LED), hatch distance (HD), and infill strategy. The results reveal that LED is the only statistically significant parameter (95% confidence level) governing the flexural performance of the graded structures. According to the selected PBF-LB process parameters, the Weaire–Phelan-based FGM flexural specimen exhibited a flexural load of 1120 N, consistent with the reported ultimate load of String of Pearls (SOP) plates (939 ± 191 N) for canine ilial fracture models. The result suggests that the fabricated prototype can closely mimic flexural loading conditions and effectively replicate the mechanical behavior of the canine ilial bone under lateral bending, making it applicable to orthopedic load-bearing conditions. The findings are validated by thermokinetic simulations and morphological characterization, including SEM/EDS, porosity analysis, and grain size measurement.