What does this research mean for the field?

During pulsed GTA welding of porous sintered 316L stainless steel, δ-ferrite forms in the heat-affected zone (HAZ), with its fraction increasing at higher heat inputs and subsequently affecting the mechanical strength of the HAZ. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To investigate the phase transformation and mechanical strength in pulsed gas tungsten arc welded joints between porous sintered and hot-rolled 316L stainless steels across different heat input levels.

September 2, 2026Journal of Welding and JoiningOpen Access

Investigation of the Welding Characteristics of Porous Sintered 316L Stainless Steel

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Authors

GLGeonhee Lee JMJoonoh Moon SKSeheon Kim

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Overview

Experimental study demonstrates heat-dependent delta-ferrite formation in porous sintered 316L stainless steel welds, highlighting key microstructural controls for semiconductor gas filters.

Key Points

To investigate the phase transformation and mechanical strength in pulsed gas tungsten arc welded joints between porous sintered and hot-rolled 316L stainless steels across different heat input levels.
Welded porous sintered 316L stainless steel to hot-rolled 316L stainless steel using pulsed gas tungsten arc (GTA) welding under three heat input conditions.
Characterized weld microstructures and phase evolution using optical microscopy, scanning electron microscopy, and electron backscattered diffraction (EBSD).
Evaluated mechanical properties and local strength variations across the weld joints using Vickers microhardness testing.
Observed the formation of δ-ferrite in the heat-affected zone (HAZ) of the porous sintered 316L stainless steel.
Demonstrated that the fraction of δ-ferrite in the HAZ increased with higher welding heat input, directly altering HAZ mechanical strength.
Established a direct correlation between local phase transformations and Vickers hardness variations throughout the welded joints.

Cite This Study

Lee et al. (2026) studied this question.

synapsesocial.com/papers/6a97e2b1c562ede874ec6e54 https://doi.org/10.5781/jwj.2026.44.4.8

View Full Paper

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September 2, 2026Journal of Welding and JoiningOpen Access

Investigation of the Welding Characteristics of Porous Sintered 316L Stainless Steel

View Full Paper

Ask AI

Bookmark

Authors

GLGeonhee Lee JMJoonoh Moon SKSeheon Kim

Discussion

Member takes

Overview

Experimental study demonstrates heat-dependent delta-ferrite formation in porous sintered 316L stainless steel welds, highlighting key microstructural controls for semiconductor gas filters.

Key Points

To investigate the phase transformation and mechanical strength in pulsed gas tungsten arc welded joints between porous sintered and hot-rolled 316L stainless steels across different heat input levels.
Welded porous sintered 316L stainless steel to hot-rolled 316L stainless steel using pulsed gas tungsten arc (GTA) welding under three heat input conditions.
Characterized weld microstructures and phase evolution using optical microscopy, scanning electron microscopy, and electron backscattered diffraction (EBSD).
Evaluated mechanical properties and local strength variations across the weld joints using Vickers microhardness testing.
Observed the formation of δ-ferrite in the heat-affected zone (HAZ) of the porous sintered 316L stainless steel.
Demonstrated that the fraction of δ-ferrite in the HAZ increased with higher welding heat input, directly altering HAZ mechanical strength.
Established a direct correlation between local phase transformations and Vickers hardness variations throughout the welded joints.

Cite This Study

Lee et al. (2026) studied this question.

synapsesocial.com/papers/6a97e2b1c562ede874ec6e54 https://doi.org/10.5781/jwj.2026.44.4.8

View Full Paper

Ask AI

Bookmark