Microstructural evolution and mechanical properties on an ARB processed IF steel studied by X-ray diffraction and EBSD

Cruz-Gandarilla, F.; Salcedo-Garrido, Ana María; Bolmaro, R.E.; Baudin, Thierry; Vincentis, N.S. De; Ávalos, Martina; Cabañas-Moreno, J. Gerardo; Mendoza-Leon, Héctor

doi:10.1016/j.matchar.2016.05.025

Cited by 36 publications

(13 citation statements)

References 29 publications

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“…For that reason, while the GND values increase with deformation, the dislocations calculated by the X-ray decrease after the second ECAP pass. The values of GNDs reported in other studies such as accumulative roll bonding (ARB) [38] ECAP [39] and HPT [40] presented higher magnitudes than the values reported in this study. Those differences can be related to different factors like the higher amount of deformation introduced, the processing conditions (room temperature) and the hydrostatic pressures involved in these processes, especially in HPT.…”

Section: Geometrically Necessary Dislocations (Gnds) Evolutioncontrasting

confidence: 86%

Microstructure and Mechanical Properties of AA6082-T6 by ECAP Under Warm Processing

Khelfa

Muñoz-Bolaños

et al. 2019

Met. Mater. Int.

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An AA6082 alloy deformed by equal channel angular pressing (ECAP) was studied. The evolution of microstructure as a function of the strain imparted was evaluated by optical microscopy (OM), scanning electron microscopy (SEM) coupled with an electron backscattered diffraction (EBSD) detector, X-ray diffraction (XRD) and Differential Scanning Calorimetry (DSC). XRD showed that MgSi2 precipitates developed in the ECAPed specimens. Texture analysis showed the apparition of two types of textures, one associated with shearing deformation and the second due to the recrystallization phenomena. Mechanical strength properties measured by tensile tests increased in the first ECAP pass, and then progressively diminished. This phenomenon was associated to the activation of continuous softening phenomena. Calorimetric analysis indicated a slightly rise in the recrystallization temperature of the deformed specimens. Also, the stored energy increased with rising ECAP passes due to the production of new dislocations. The average geometrically necessary dislocation (GND) density, measured by EBSD, increased with increasing ECAP passes. However, the rate of increase slows down with the progress of ECAP passes.

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Section: Geometrically Necessary Dislocations (Gnds) Evolutioncontrasting

confidence: 86%

Microstructure and Mechanical Properties of AA6082-T6 by ECAP Under Warm Processing

Khelfa

Muñoz-Bolaños

et al. 2019

Met. Mater. Int.

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“…Typically, the grain size of materials processed by SPD is in the sub-micrometer or nanometer area. Some SPD processes are reported in the previous researches, such as the equal-channel angular pressing (ECAP) [ 3 , 4 ], high-pressure torsion (HPT) [ 5 , 6 ], and accumulative roll-bonding (ARB) [ 7 , 8 , 9 ]. Among them, HPT processing is particularly attractive due to the fact that processed grains are remarkably smaller than other techniques by experimental results [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution and Mechanical Properties in Superlight Mg-Li Alloy Processed by High-Pressure Torsion

et al. 2018

Materials

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Microstructural evolution and mechanical properties of LZ91 Mg-Li alloy processed by high-pressure torsion (HPT) at an ambient temperature were researched in this paper. The microstructure analysis demonstrated that significant grain refinement was achieved after HPT processing with an average grain size reducing from 30 μm (the as-received condition) to approximately 230 nm through 10 turns. X-ray diffraction analysis revealed LZ91 alloy was consisted of α phase (hexagonal close-packed structure, hcp) and β phase (body-centered cubic structure, bcc) before and after HPT processing. The mean value of microhardness increased with the increasing number of HPT turns. This significantly increased hardness of specimens can be explained by Hall-Petch strengthening. Simultaneously, the distribution of microhardness along the specimens was different from other materials after HPT processing due to the different mechanical properties of two different phases. The mechanical properties of LZ91 alloy processed by HPT were assessed by the micro-tensile testing at 298, 373, 423, and 473 K. The results demonstrate that the ultra-fine grain LZ91 Mg-Li alloy exhibits excellent mechanical properties: tensile elongation is approximately 400% at 473 K with an initial strain rate of 1 × 10−2 s−1.

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“…In addition, the strain to rupture is retained at a high level with approx. 20% of elongation in comparison to roll-bonded sheets of pure LC steel [33] or IF steel [38], which is caused by the TWIP effect. Furthermore, Figure 11 shows that the bi-material laminate composite reveals even higher yield strength and tensile strength at concurrently high ductility compared to the mono-material roll-bonded steel 9Ni-0.04C sheets due to the additional TRIP effect from the 7Ni-0.07C sheet, which resulted in a content of deformation-induced martensite of approximately 15 wt% (Table 3).…”

Section: Tensile Propertiesmentioning

confidence: 93%

“…Only few papers are concerned with steel laminated composites. When processing laminated steels, mostly interstitial-free (IF) steels, and low-carbon (LC) steels [10,[32][33][34][35][36][37][38][39] or ferritic and stainless steels [40][41][42] are used. The ferritic/stainless steel composites have the advantage of good corrosion resistance using stainless steel as outer layer materials in addition to the high weld-ability and high strength of ferritic steel [40].…”

Section: Introductionmentioning

confidence: 99%

Laminated TRIP/TWIP Steel Composites Produced by Roll Bonding

Qiu

Kaden

Schmidtchen

et al. 2019

Metals

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In order to investigate the roll bonding of high-alloy transformation induced plasticity (TRIP) and twinning induced plasticity (TWIP) steel, roll-bonded sheets of the TRIP and TWIP steel were manufactured starting from hot rolling, followed by brushing and cold rolling. Both, the microstructure and mechanical properties of the roll-bonded sheets were characterized by metallographic investigations, and tensile and T-peel tests. Preliminary results, such as an occurrence of an adhesive bonding between two TWIP steel sheets and between TRIP and TWIP steel sheet after a thickness reduction of approximately 50% were obtained. Moreover, the formation of deformation-induced martensite leads to outstanding mechanical properties of the roll-bonded composite sheet. An ultra-fine grained microstructure was observed in the bonding zone after only one roll-bonding process. The obtained promising results demonstrate the possibility of the development of an accumulative roll-bonding process for TRIP/TWIP steel composites.

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Microstructural evolution and mechanical properties on an ARB processed IF steel studied by X-ray diffraction and EBSD

Cited by 36 publications

References 29 publications

Microstructure and Mechanical Properties of AA6082-T6 by ECAP Under Warm Processing

Microstructure and Mechanical Properties of AA6082-T6 by ECAP Under Warm Processing

Microstructural Evolution and Mechanical Properties in Superlight Mg-Li Alloy Processed by High-Pressure Torsion

Laminated TRIP/TWIP Steel Composites Produced by Roll Bonding

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