Influence of hydrostatic extrusion process on the microstructure and texture of polycrystalline nickel

Majda, Tomasz; Moszczyńska, Dorota; Zdunek, Joanna; Kulczyk, Mariusz; Mizera, J.; Kurzydłowski, Krzysztof J.

doi:10.1080/02670836.2017.1343263

Cited by 7 publications

(4 citation statements)

References 29 publications

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“…In order to determine the influence of initial texture on the formation of the deformation texture, it was necessary to analyse the texture of the polycrystalline aluminium before the HE process. Other studies on polycrystalline alloys after HE revealed the formation of double fibre texture [23,31,32] with different volume fractions of the 111 and 001 components. In order to perform a more detailed analysis, quantitative calculations of texture components were conducted (figure 6).…”

Section: Texturementioning

confidence: 92%

Microstructure and texture development in a polycrystal and different aluminium single crystals subjected to hydrostatic extrusion

et al. 2019

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A hydrostatic extrusion (HE) process was applied to commercial pure polycrystalline aluminium (99.9%) and two aluminium single crystals 111 and 110. On comparison, the results obtained from single crystals and polycrystalline aggregates are unique. Microstructure and crystallographic texture investigations were performed by transmission electron microscopy, electron backscatter diffraction and X-ray diffraction (XRD). Significant differences in grain refinement and texture formation were noticed depending on the starting orientation. The deformed single crystal with 110 starting orientation features an average grain size value of 150% higher than the second investigated single crystal (0.5 μm for the 111 single crystal and 1.3 μm for the second crystal). In turn, the average grain size obtained for polycrystalline aluminium is 0.9 μm. The deformation process causes a difference in the grain sizes, while a fraction of the high angle grain boundaries have a comparable volume percentage in all the deformed microstructures-reached about 35%. The qualitative and quantitative XRD texture results proved that the HE process leads to the formation of a characteristic fibrous texture.

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Section: Texturementioning

confidence: 92%

Microstructure and texture development in a polycrystal and different aluminium single crystals subjected to hydrostatic extrusion

et al. 2019

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“…{111} < 110 > and {111} < 112 > ) and α-fiber texture (i.e. {111} < 110 > , {112} < 110 > and {001} < 110 > ) [21][22][23][24][25]. The difference is mainly due to the deformation condition, namely the large torque with super high hydrostatic pressure.…”

Section: Microstructure Evolutionmentioning

confidence: 99%

“…But the relationship between the texture structure and elastic modulus under HPT deformation is unclear. Recently, the texture evolution of Mo and other metals in previous literature is mainly based on hot rolling, uniaxial compression, extrusion process and heat treatment [21][22][23][24][25]. There are obvious differences between the microstructure formed by HPT deformation and by the conventional plastic deformation process, which is due to severe continuous shear deformation under extremely high hydrostatic pressure.…”

Section: Introductionmentioning

confidence: 99%

Nano-indentation nanohardness and elastic modulus evolution of molybdenum processed by high-pressure torsion

Ke-min

Wang

et al. 2021

Materials Science and Technology

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In this paper, high-pressure torsion (HPT) was conducted on pure molybdenum (Mo) (99.9 wt.%) under the 6 GPa pressure at room temperature with an angular velocity of 1 rev min−1. The samples processed by 1, 2, 5 turns of HPT were obtained. After 5 revolutions of HPT, the grains were significantly refined to 0.77 ± 0.17 µm and the main textures are {012}<121> and {001}<110>. The dislocation density of the sample after 2 turns of HPT deformation reaches to the maximum value. The elastic modulus of pure molybdenum after 5 turns of HPT has a great decrease. It is found that texture structures, dislocations and non-equilibrium grain boundaries can influence the elastic modulus evolution, and the latter two are the main factors.

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“…Hydrostatic extrusion is optimal for fabricating products experiencing a high strain and possessing a complex shape. This is because the process conditions enable the exertion of a uniform pressure on the product, accompanied by a low friction between the product and the container with the help of a surrounding fluidlike grease [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of strains on textural evolution of hydrostatically extruded niobium tubes

Lee

Park

Jeong

2020

Materials Science and Technology

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The influence of tube strains on tube deformation ratios and textural evolution during the deformation of pure Nb tubes subjected to hydrostatic extrusion was investigated. The tube deformation ratios increased with increasing tube strains. A very strong <111> fibre texture at a lower strain transformed to a dual strong <100> and weak <111> fibre texture at a higher strain. The texture evolution led to an increase in the Taylor factor at the drawing tensor.

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Influence of hydrostatic extrusion process on the microstructure and texture of polycrystalline nickel

Cited by 7 publications

References 29 publications

Microstructure and texture development in a polycrystal and different aluminium single crystals subjected to hydrostatic extrusion

Microstructure and texture development in a polycrystal and different aluminium single crystals subjected to hydrostatic extrusion

Nano-indentation nanohardness and elastic modulus evolution of molybdenum processed by high-pressure torsion

Effect of strains on textural evolution of hydrostatically extruded niobium tubes

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