Three Dimensional Methodology to Characterize Large Dendritic Equiaxed Grains in Industrial Steel Ingots

Gennesson, Marvin; Zollinger, Julien; Daloz, D.; Rouat, Bernard; Demurger, Joëlle; Combeau, Hervé

doi:10.3390/ma11061007

Cited by 10 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Upward directional solidifications of refined Al-20wt.%Cu alloys aboard parabolic flights have been performed by Abou-Khalil et al [10], who reported explosive grain nucleation in the constitutionally undercooled zone following a sudden increase of the gravity level. Few studies have reported systematic measurements of the evolution of the grain shape and morphology [11][12][13]. These are however crucial parameters needed as criteria in numerical simulations to determine the position of the Columnar-to-Equiaxed Transition in ingot casting [2,14].…”

Section: Introductionmentioning

confidence: 99%

Impact of growth velocity on grain structure formation during directional solidification of a refined Al-20 wt.%Cu alloy

Soltani

Reinhart

Benoudia³

et al. 2020

Journal of Crystal Growth

View full text Add to dashboard Cite

The paper presents detailed analyses of solidification experiments performed on a refined Al-20wt.%Cu alloy using the SFINX (Solidification Furnace with IN situ X-radiography) laboratory facility. Directional solidifications of a sheet-like sample were carried out in a horizontal configuration, with the main surface of the sample parallel to the ground. The sample was solidified for a wide range of cooling rates to obtain various grain structures, from columnar to elongated and equiaxed. The formation of the grain structure was observed in-situ and in real-time by X-radiography, which allows the dynamic of solidification phenomena to be thoroughly analyzed. Based on the radiographs, quantitative measurements were performed to

show abstract

Section: Introductionmentioning

confidence: 99%

Impact of growth velocity on grain structure formation during directional solidification of a refined Al-20 wt.%Cu alloy

Soltani

Reinhart

Benoudia³

et al. 2020

Journal of Crystal Growth

View full text Add to dashboard Cite

show abstract

“…The effects of the intensive plastic deformation on grain sizes of the components of the laminate were assessed, too. The grain sizes were evaluated using the maximum Feret diameter parameter, which is defined as the largest distance between two points defining an individual grain [ 36 ]. The average grain sizes for the components of the laminated rods were calculated from the overall numbers of grains present at the respective scanned regions.…”

Section: Resultsmentioning

confidence: 99%

Characterising Correlations between Electric Conductivity and Structural Features in Rotary Swaged Al/Cu Laminated Conductors

et al. 2022

View full text Add to dashboard Cite

This study aims to characterize the correlations between electric characteristics and selected structural features of newly designed Al/Cu laminated conductors manufactured via room temperature rotary swaging. After swaging, the laminates with diameters of 15 mm were subjected to two different post-process annealing treatments. Structure analyses performed to evaluate the effects of thermomechanical processing were performed via scanning and transmission electron microscopies. Electric conductivity and resistivity of the laminates were experimentally measured and numerically simulated using models designed according to the real conditions. The results showed that the electric resistivity was affected by the grain size, bimodal grains’ distribution (where observed), the presence of twins, and, last but not least, dislocation density. Among the influencing factors were the area fractions of Al and Cu at the cross-sections of the of the laminated conductors, too. The results revealed that fabrication of the laminate via the technology of rotary swaging introduced more advantageous combinations of electric and mechanical properties than fabrication by conventional manufacturing techniques. The lowest specific electric resistivity of 20.6 Ωm × 10−9 was measured for the laminated conductor subjected to the post-process annealing treatment at 350 °C, which imparted significant structure restoration (confirmed by the presence of fine, equiaxed, randomly oriented grains).

show abstract

“…The grain size parameter was evaluated via the maximum feret diameter value. This value can be defined as the largest distance between two points characterizing an individual grain [40]. The average grain size values for the individual components of the composites were calculated from the total numbers of grains occurring at the individual scanned regions.…”

Section: (Sub) Structure Developmentmentioning

confidence: 99%

Influence of (Sub) Structure Development within Rotary Swaged Al–Cu Clad Conductors on Skin Effect during Transfer of Alternating Current

et al. 2022

View full text Add to dashboard Cite

The nature of alternating current transfer via metallic materials is specific, since the current density tends to be inhomogeneous across the cross-section of the conductor and the skin effect tends to occur. However, the influence of this effect on the behaviour of the conductor can be optimized via the design and fabrication procedures. The study presents innovative design of an Al–Cu clad conductor, which is supposed to affect favourably the influence of the skin effect. The clad conductors of various diameters (20 mm, 15 mm, and 10 mm) were fabricated via rotary swaging at room temperature, and their electric characteristics were subsequently examined both experimentally and via numerical simulations. Structure analyses performed to document the effects of the swaging technology on the development of substructure and characteristic structural features were carried out by scanning electron microscopy (electron backscatter diffraction analyses), and transmission electron microscopy. The results showed that the design of the composite has a favourable effect on decreasing the power losses during alternating current transfer and that the substructure development affected favourably the electric resistance of the conductor. The highest electric resistance was measured for the composite conductor with the diameter of 20 mm (1.8% increase compared to electric resistance during transfer of direct current). This value then decreased to 0.6%, and 0.1% after swaging down to the diameters of 15 mm, and 10 mm; the 10 mm composite featured the finest grains, partially restored structure, and texture randomization compared to the 20 mm and 15 mm composites. Manufacturing of the clad composite via rotary swaging imparted advantageous combinations of both the electric and mechanical properties, as swaging also introduced increased microhardness.

show abstract

Three Dimensional Methodology to Characterize Large Dendritic Equiaxed Grains in Industrial Steel Ingots

Cited by 10 publications

References 25 publications

Impact of growth velocity on grain structure formation during directional solidification of a refined Al-20 wt.%Cu alloy

Impact of growth velocity on grain structure formation during directional solidification of a refined Al-20 wt.%Cu alloy

Characterising Correlations between Electric Conductivity and Structural Features in Rotary Swaged Al/Cu Laminated Conductors

Influence of (Sub) Structure Development within Rotary Swaged Al–Cu Clad Conductors on Skin Effect during Transfer of Alternating Current

Contact Info

Product

Resources

About