High-Temperature Deformation and Texture Evolution in Wire-Arc Additively Manufactured 316L Stainless Steel
Faculty Mentor
Dr. Bishal Silwal
Location
Russell Union Ballroom
Type of Research
On-going
Session Format
Poster Presentation
College
Allen E. Paulson College of Engineering & Computing
Department
Mechanical Engineering
Abstract
Wire Arc Additive Manufacturing WAAM is increasingly used for producing large-scale stainless-steel components, yet its suitability for subsequent forging requires a clear understanding of its hot deformation behavior. This study investigates the low strain rate hot compression response of WAAM fabricated 316L stainless steel under industrially relevant conditions of 871 °C and strain rates of 0.01 to 0.1 s⁻¹. Flow stress analysis reveals recovery dominated deformation with no clear evidence of dynamic recrystallization DRX, as indicated by near zero strain hardening rates at higher strains. Non isothermal forging conditions, particularly die chilling from 300 °C platnes, generate steep thermal gradients and localized cooling near the die workpiece interface, which strongly suppress DRX activation. Finite element simulations confirm the presence of low strain dead metal zones that are unfavorable for recrystallization kinetics. Although lower strain rates promote more homogeneous plastic deformation and smoother hardness gradients, strain rate reduction alone is insufficient to trigger DRX under the imposed thermal conditions. EBSD analysis shows that the WAAM induced ⟨100⟩ fiber texture is largely retained after compression, indicating limited microstructural breakdown. Post deformation solution heat treatment is therefore essential to achieve homogenization through recovery and static recrystallization.
Program Description
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Start Date
4-23-2026 10:00 AM
End Date
4-23-2026 12:00 PM
Recommended Citation
Sayeed, Abdullah All, "High-Temperature Deformation and Texture Evolution in Wire-Arc Additively Manufactured 316L Stainless Steel" (2026). GS4 Student Scholars Symposium. 25.
https://digitalcommons.georgiasouthern.edu/research_symposium/2026/2026/25
High-Temperature Deformation and Texture Evolution in Wire-Arc Additively Manufactured 316L Stainless Steel
Russell Union Ballroom
Wire Arc Additive Manufacturing WAAM is increasingly used for producing large-scale stainless-steel components, yet its suitability for subsequent forging requires a clear understanding of its hot deformation behavior. This study investigates the low strain rate hot compression response of WAAM fabricated 316L stainless steel under industrially relevant conditions of 871 °C and strain rates of 0.01 to 0.1 s⁻¹. Flow stress analysis reveals recovery dominated deformation with no clear evidence of dynamic recrystallization DRX, as indicated by near zero strain hardening rates at higher strains. Non isothermal forging conditions, particularly die chilling from 300 °C platnes, generate steep thermal gradients and localized cooling near the die workpiece interface, which strongly suppress DRX activation. Finite element simulations confirm the presence of low strain dead metal zones that are unfavorable for recrystallization kinetics. Although lower strain rates promote more homogeneous plastic deformation and smoother hardness gradients, strain rate reduction alone is insufficient to trigger DRX under the imposed thermal conditions. EBSD analysis shows that the WAAM induced ⟨100⟩ fiber texture is largely retained after compression, indicating limited microstructural breakdown. Post deformation solution heat treatment is therefore essential to achieve homogenization through recovery and static recrystallization.
