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Storozheva, L. M.

doi:10.1023/a:1013632315470

Cited by 2 publications

(6 citation statements)

References 5 publications

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“…The mechanism of the BH effect has been discussed in several research papers, after which BH steel must contain a certain minimum amount of solute C that is responsible for the strength increment as a result of interstitial atom segregation to dislocations [1,14,24]. The lower level of solute C, the less BH strength is gained.…”

Section: Fig 5 Sem Micrograph Of the Steel Pre-strained To 6 % And mentioning

confidence: 99%

“…Steels that harden during drying are very promising materials that make it possible to combine low yield strength with substantial hardening after forging and drying of the lacquer coating of the finished car [1]. The steel sheets used for the car's inner and outer panels (door, hood, and roof) should have high strength and good formability.…”

Section: Introductionmentioning

confidence: 99%

“…Interstitial free steel is considered suitable for a BH grade because of its good formability processing and easier control of the solute C to the desired level [7]. According to Storotreva et al, the BH effect was based on the ability of free C atoms to fix mobile dislocations in ferrite at elevate temperatures, so this makes it possible to harden stamped parts in the process of drying the paint [1]. Some research has been conducted to clarify the BH effect of IF steels [4,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Some research has been conducted to clarify the BH effect of IF steels [4,[7][8][9]. Several mechanisms have been proposed for the strain-aging phenomenon of steels that contain solute C and N; however, the major mechanism currently accepted is dislocation pinning by solute C or N atoms and precipitation hardening [1,4].…”

Section: Introductionmentioning

confidence: 99%

“…BH phenomenon of high strength IF steel has been studied by earlier research works [1,[6][7][8][9][10][11]. As far as the IF steels are concerned, most research has been concerned with the formability improvement but keeping high strength because this confers a high dent resistance for the steel.…”

Section: Introductionmentioning

confidence: 99%

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Bake hardening effect of the low strength interstitial free steel

Bui

Nguyen

2020

Metall Mater Eng

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This paper investigates the influence of pre-strain and temperature on the bake hardening (BH) effect of the low strength interstitial free (IF) steel with the yield strength of 137 MPa. The tensile specimens were pre-strained to 2-4-6 % at room temperature followed by baking at temperatures of 150-200-250 oC for 20 minutes. The BH strength was determined by a standard procedure based on the difference between the lower yield strength of the baked specimen and the flow stress of the initial one. The microstructure of the IF steels was characterized by optical microscopy and scanning electron microscopy for the purpose of explaining the BH effect. All the initial and baked steels show a microstructure that includes the ferrite phase, of an average grains size of 45 µm. This observation was consistent with the mechanical properties of the initial steel. The BH strengths have been achieved from 12 to 35 MPa, in which the maximum value was found for the specimen that pre-strained to 6 % and baked at 200 oC. The BH strengths increased with increasing the pre-strain, but slightly decreased when the baking temperature was 250 oC. This mechanism is attributed to pinning of dislocation by carbon solute atoms during the baking process, and the BH strength was correlated with grain boundary segregation.

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Section: Fig 5 Sem Micrograph Of the Steel Pre-strained To 6 % And mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bake hardening effect of the low strength interstitial free steel

Bui

Nguyen

2020

Metall Mater Eng

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Effect of Strain Localization on the Mechanical Properties from Nonuniform Grain Size Distribution of Ultralow Carbon Steel

Kang

Yoon

2022

steel research int.

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The effect of the bimodal grain size distribution in the range of several tens of micrometers is studied to investigate the mechanical properties of metallic materials with single‐phase ferritic microstructure. The previous studies on the bimodal distribution of grain size have been performed on materials with nanocrystalline, ultrafine, or multiphase microstructures, and have generally reported that the mixed structure of fine and coarse grains improves the ductility of the material, because the coarser grains preferentially accommodate deformation. However, herein, the coarse grains do not accept the deformation well during plastic deformation and cause nonuniform deformation, which lowers the work hardening coefficient and accelerates necking of sheet. The influence of the bimodal grain size distribution on the mechanical properties is evaluated using tensile and various formability tests. Microstructural changes before and after deformation are tracked by electron backscatter diffraction.

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Untitled

Cited by 2 publications

References 5 publications

Bake hardening effect of the low strength interstitial free steel

Bake hardening effect of the low strength interstitial free steel

Effect of Strain Localization on the Mechanical Properties from Nonuniform Grain Size Distribution of Ultralow Carbon Steel

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