March 1, 2024Journal of Materials Research and TechnologyOpen Access

Synchrotron based investigation of anisotropy and microstructure of wire arc additive manufactured Grade 91 steel

View Full Paper

Ask AI

Bookmark

Authors

IRIshtiaque RobinPacific Northwest National Laboratory DSDavid SprousterStony Brook University NSNiyanth SridharanLincoln Electric (United States)

Discussion

Member takes

Implication

Experimental analysis reveals microstructural recovery with persistent anisotropy in additive manufactured Grade 91 steel, indicating that heat treatment fails to eliminate directional effects.

Key Points

Post-build heat treatment eliminated low-carbon martensite in additive manufacturing of Grade 91 steel, yet structural anisotropy persisted across orientations.
Thermal processing achieved an ~82.5% reduction in microstrain and increased grain size by 61.5%, restoring hardness comparable to conventionally processed steel.
Computational thermodynamics and synchrotron X-ray diffraction quantified the evolving microstructure alongside microhardness across different build directions.
Highlights that post-build heat treatments alone cannot eliminate mechanical anisotropy, requiring optimized additive manufacturing build strategies.

Cite This Study

Robin et al. (2024) studied this question.

synapsesocial.com/papers/68e761c9b6db6435876d7d32 https://doi.org/10.1016/j.jmrt.2024.02.230

View Full Paper

Ask AI

Bookmark

Implication

Experimental analysis reveals microstructural recovery with persistent anisotropy in additive manufactured Grade 91 steel, indicating that heat treatment fails to eliminate directional effects.

Synchrotron based investigation of anisotropy and microstructure of wire arc additive manufactured Grade 91 steel

Discussion

Member takes

Implication

Key Points

Cite This Study

Synchrotron based investigation of anisotropy and microstructure of wire arc additive manufactured Grade 91 steel

Discussion

Member takes

Implication

Key Points

Cite This Study

Also Consider

Also Consider