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<p>This study explores the correlation between crystallographic texture evolution and functional properties in additively manufactured Inconel 625 alloy subjected to ultrasonic nanocrystal surface modification (UNSM) at different powers. The as-built alloy, produced by selective laser melting, exhibited a weak cube [001] orientation that became more pronounced after UNSM at 100 and 170 W, while a mixed cube-Goss texture developed at 420 W. Cross-sectional microstructures revealed a progressively thicker plastically deformed surface layer with increasing power, accompanied by surface hardness increases of approximately 63.3%, 72%, and 78%, corresponding to average surface hardness values of ~ 497 HV5, ~ 523 HV5, and ~ 541 HV5 for 100, 170, and 420 W, respectively, compared with the as-built condition (~304 HV5). These structural changes align with previously reported residual compressive stresses (−109, − 353, and − 549&#xa0;MPa). Although the overall texture intensity remained low, with maximum ODF values &lt; 2.8&#xa0;m.r.d., a slight correlation was observed between the evolution of cube and Goss components and the variations in hardness and surface strengthening. However, the improvements in wear and corrosion resistance are primarily attributed to microstructural refinement, strain accumulation, and compressive stress, indicating that texture plays only a secondary but contributory role.</p>

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Crystallographic Texture Evolution in Additively Manufactured Inconel 625 After Ultrasonic Nanocrystal Surface Modification

  • 期刊论文

  • 发表日期：

    2026年2月19日

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  • Morteza Hadi,
  • Vahid Fartashvand

摘要

This study explores the correlation between crystallographic texture evolution and functional properties in additively manufactured Inconel 625 alloy subjected to ultrasonic nanocrystal surface modification (UNSM) at different powers. The as-built alloy, produced by selective laser melting, exhibited a weak cube [001] orientation that became more pronounced after UNSM at 100 and 170 W, while a mixed cube-Goss texture developed at 420 W. Cross-sectional microstructures revealed a progressively thicker plastically deformed surface layer with increasing power, accompanied by surface hardness increases of approximately 63.3%, 72%, and 78%, corresponding to average surface hardness values of ~ 497 HV5, ~ 523 HV5, and ~ 541 HV5 for 100, 170, and 420 W, respectively, compared with the as-built condition (~304 HV5). These structural changes align with previously reported residual compressive stresses (−109, − 353, and − 549 MPa). Although the overall texture intensity remained low, with maximum ODF values < 2.8 m.r.d., a slight correlation was observed between the evolution of cube and Goss components and the variations in hardness and surface strengthening. However, the improvements in wear and corrosion resistance are primarily attributed to microstructural refinement, strain accumulation, and compressive stress, indicating that texture plays only a secondary but contributory role.