Segregation Behaviour of Third Generation Advanced High-Strength Mn-Al Steels

Grajcar, A.

doi:10.2478/v10266-012-0049-2

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…This phenomenon is confirmed by its high reduction in the case of sample 400C, which indicates that the areas less enriched in chemical elements undergo the transformation as firstduring initial martensitic transformation. Previous tests of analyzed steel at the casting and forging stage confirmed the presence of microsegregation [44,45], which has been significantly limited by soaking and thermomechanical processing (forging and hot rolling). However, the current results confirm that it has not been completely eliminated.…”

Section: Transformation Kinetics and Microsegregationmentioning

confidence: 94%

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Bainite plate thickness reduction and microstructure tailoring by double austempering of Al-rich 3Mn steel

Skowronek

Cordova-Tapia

Tobajas-Balsera

et al. 2022

Materials Science and Engineering: A

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Section: Transformation Kinetics and Microsegregationmentioning

confidence: 94%

“…Despite the increased addition of manganese in steel, which significantly delays the bainitic transformation [35,45,46], in all cases it is completed below 10 min. This is due to the large addition of Al in the steel (1.6 wt%).…”

Section: Transformation Kinetics and Microsegregationmentioning

confidence: 94%

Bainite plate thickness reduction and microstructure tailoring by double austempering of Al-rich 3Mn steel

Skowronek

Cordova-Tapia

Tobajas-Balsera

et al. 2022

Materials Science and Engineering: A

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“…Additionally, it may be pointed out that at high temperatures, deformation proceeds easily with no critical obstacles. A very important feature in these kinds of steels is the alloying elements enrichment because of austenite stabilization, resulting in some problems such as segregation/microsegregation and localized deformation [74]. Precipitation of the second-phase particles at grain boundaries may result when temperature variations occur and the concentration of segregated solute at grain boundaries becomes supersatured.…”

Section: Fracture Surface Analysis On Hot Ductilitymentioning

confidence: 99%

Effect of Ti and B microadditions on the hot ductility behavior of a High-Mn austenitic Fe–23Mn–1.5Al–1.3Si–0.5C TWIP steel

Mejı́a

Salas-Reyes

Calvo

et al. 2015

Materials Science and Engineering: A

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a b s t r a c tThis research work studies the effect of combined Ti and B microadditions and the solidification route on the hot ductility behavior of a high-Mn austenitic Twinning Induced Plasticity (TWIP) steel. For this purpose, uniaxial hot tensile tests were carried out at different temperatures between 700 and 1100°C under a constant strain rate of 10. The hot ductility was determined by measuring the reduction of transverse area (%RA) after specimen rupture. Characterization was performed by SEM-EBSD and TEM techniques in order to identify the relationship between microstructural features and cracking phenomena. Results indicate that the early occurrence of dynamic recrystallization (DRX) at the intermediate temperature range (800-900°C) is the favorable mechanism that enhances the ductility, achieving RA values up to 82%. These high RA values are discussed in terms of the boron effect on the improvement of the grain-boundaries cohesion through non-equilibrium segregation, and Ti(C,N) precipitation, which reduces the formation of harmful precipitates such as BN and AlN. Additionally, the Fe 23 (B,C) 6 and B 4 C compounds were identified, which are less detrimental to hot ductility than boron-nitride compounds. Finally, the fracture surfaces of the present TWIP steels in the temperature range of the highest ductility indicate that the failure mode is of the ductile type as evidenced by the presence of many dimples.

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“…Thus, materials that tend to macrosegregate can be fabricated more easily. One material class that tends to macrosegregate [ 14 , 15 ] but offers a unique opportunity for the development of cost-effective and light-weight parts with enhanced crashworthiness [ 16 ] are advanced high strength steels [ 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Adjustment of Mechanical Properties of Medium Manganese Steel Produced by Laser Powder Bed Fusion with a Subsequent Heat Treatment

et al. 2021

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Medium manganese steels can exhibit both high strength and ductility due to transformation-induced plasticity (TRIP), caused by metastable retained austenite, which in turn can be adjusted by intercritical annealing. This study addresses the laser additive processability and mechanical properties of the third-generation advanced high strength steels (AHSS) on the basis of medium manganese steel using Laser Powder Bed Fusion (LPBF). For the investigations, an alloy with a manganese concentration of 5 wt.% was gas atomized and processed by LPBF. Intercritical annealing was subsequently performed at different temperatures (630 and 770 °C) and three annealing times (3, 10 and 60 min) to adjust the stability of the retained austenite. Higher annealing temperatures lead to lower yield strength but an increase in tensile strength due to a stronger work-hardening. The maximum elongation at fracture was approximately in the middle of the examined temperature field. The microstructure and properties of the alloy were further investigated by scanning electron microscopy (SEM), hardness measurements, X-ray diffraction (XRD), electron backscatter diffraction (EBSD) and element mapping.

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Segregation Behaviour of Third Generation Advanced High-Strength Mn-Al Steels

Cited by 4 publications

References 7 publications

Bainite plate thickness reduction and microstructure tailoring by double austempering of Al-rich 3Mn steel

Bainite plate thickness reduction and microstructure tailoring by double austempering of Al-rich 3Mn steel

Effect of Ti and B microadditions on the hot ductility behavior of a High-Mn austenitic Fe–23Mn–1.5Al–1.3Si–0.5C TWIP steel

Adjustment of Mechanical Properties of Medium Manganese Steel Produced by Laser Powder Bed Fusion with a Subsequent Heat Treatment

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