Nitrogen-induced yield point phenomenon in an austenitic steel

Shin, Jong‐Ho; Jeong, Jae Seok; Lee, J.; Kim, S.-D.; Jang, Jae Hoon; Moon, Joonoh; Ha, Heung Yong; Lee, T.-H.

doi:10.1016/j.msea.2019.138897

Cited by 8 publications

(1 citation statement)

References 21 publications

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“…Interestingly, the cold-rolled specimen subjected to an annealing temperature range from 300 to 500 • C exhibited higher hardness and ultimate tensile strength compared to the as-cold-rolled specimen. The increase in mechanical properties was attributed to the significant interaction between partial dislocation and nitrogen in samples annealed below 500 • C [33].…”

Section: Recrystallization Effects On Mechanical Propertiesmentioning

confidence: 99%

Effects of Annealing Temperature on Microstructural Evolution and Mechanical Properties in Cold-Rolled High-Nitrogen Austenitic Steel

Shin,

Song,

2024

Metals

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High-nitrogen austenitic steel (HNS) cold-rolled with a reduction rate of 25% was subjected to an investigation of the effect of annealing temperature on microstructural evolution, tensile properties and the variation in fracture surface morphology. In cold-rolled HNS, matrix recovery occurred at an annealing temperature of 600 °C, and recrystallization was locally initiated at an annealing temperature of 800 °C. The 0.2% offset yield strength (0.2% YS) and ultimate tensile strength (UTS) were almost constant up to an annealing temperature of 500 °C, and these values gradually decreased above the annealing temperature of 600 °C, while a sharp reduction in the percentage reduction in area (RA) occurred at the annealing temperatures of 600 and 700 °C due to Cr2N precipitation along the grain and twin boundaries. The ratio of 0.2% offset yield strength to ultimate tensile strength (0.2% YS/UTS) remained constant until matrix recovery took place; however, once recrystallization occurred, the ratio decreased significantly. Furthermore, the variation in the morphology of Cr2N along the grain boundaries in the annealing temperature range from 600 to 800 °C influenced the intergranular fracture morphology, resulting in a transition from dimple to ledge and back to dimple.

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Section: Recrystallization Effects On Mechanical Propertiesmentioning

confidence: 99%

Effects of Annealing Temperature on Microstructural Evolution and Mechanical Properties in Cold-Rolled High-Nitrogen Austenitic Steel

Shin,

Song,

2024

Metals

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Insights into the Impact Behavior and Deformation Substructure Evolution of the N‐Bearing QN1803 and 304 Stainless Steels

Zhao

Wei

Zheng³

et al. 2022

steel research int.

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The impact behaviors of N‐bearing QN1803 and 304 stainless steels are studied using instrumented Charpy impact test in the range of −192–100 °C. The fracture and deformation substructures are systematically investigated by scanning electron microscopy and transmission electron microscopy. The results show that QN1803 presents ductile–brittle transition temperature (DBTT) and 304 shows ductile fracture. With increasing temperature, the stacking fault energy (SFE) of QN1803 and 304 increases, but the former is always lower than the latter. QN1803 presents low impact toughness with low‐density dislocation at −192 °C. At high temperature, QN1803 and 304 show good impact toughness and the deformation substructures are dominated by high‐density dislocations and deformation twinning.

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Simultaneous improvement of strength and plasticity: Nano-twin construction for a novel high-nitrogen TWIP steel

Lu,

Wang,

Yao

et al. 2024

International Journal of Plasticity

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Nitrogen-induced yield point phenomenon in an austenitic steel

Cited by 8 publications

References 21 publications

Effects of Annealing Temperature on Microstructural Evolution and Mechanical Properties in Cold-Rolled High-Nitrogen Austenitic Steel

Effects of Annealing Temperature on Microstructural Evolution and Mechanical Properties in Cold-Rolled High-Nitrogen Austenitic Steel

Insights into the Impact Behavior and Deformation Substructure Evolution of the N‐Bearing QN1803 and 304 Stainless Steels

Simultaneous improvement of strength and plasticity: Nano-twin construction for a novel high-nitrogen TWIP steel

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