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<p>This study investigates the potential of wire arc additive manufacturing for producing high-performance stainless steel 316L components used in aerospace, automotive, and biomedical applications. Crack toughness was evaluated using single edge notch bend testing, revealing that the additively manufactured specimen exhibited a toughness of 134.42&#xa0;MPa<i>√m</i>, which is 7.7 percent higher than its wrought counterpart. Microstructural analysis showed a mixed dendritic structure of columnar and equiaxed grains, contributing to enhanced crack resistance. Fractographic examination confirmed ductile failure dominated by microvoid coalescence. Numerical simulations using a globally enriched finite element method accurately predicted crack behavior, with less than two percent deviation from experimental results. The findings confirm that wire arc additive manufacturing improves fracture performance and that the simulation approach is a reliable tool for fracture analysis in additively manufactured structures.</p>

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Microstructural Correlation and Experimental and Numerical Fracture Analysis on Additively Fabricated Single Edge Notch Bend Test Specimen

  • 期刊论文

  • 发表日期：

    2025年9月11日

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  • Dhinakaran Veeman,
  • Kanishkaa Jeevaraj,
  • Mohith Mohan Das,
  • Pechimuthu Arumugaperumal,
  • Bhavankumar Padmanaban,
  • Micheal Agnelo Browne,
  • Mohan Kumar Subramaniyan

摘要

This study investigates the potential of wire arc additive manufacturing for producing high-performance stainless steel 316L components used in aerospace, automotive, and biomedical applications. Crack toughness was evaluated using single edge notch bend testing, revealing that the additively manufactured specimen exhibited a toughness of 134.42 MPa√m, which is 7.7 percent higher than its wrought counterpart. Microstructural analysis showed a mixed dendritic structure of columnar and equiaxed grains, contributing to enhanced crack resistance. Fractographic examination confirmed ductile failure dominated by microvoid coalescence. Numerical simulations using a globally enriched finite element method accurately predicted crack behavior, with less than two percent deviation from experimental results. The findings confirm that wire arc additive manufacturing improves fracture performance and that the simulation approach is a reliable tool for fracture analysis in additively manufactured structures.