Wear properties of thixoformed AlSiCuFe alloys

Birol, Yücel; Birol, Feriha

doi:10.1007/s12289-008-0222-x

Cited by 27 publications

(38 citation statements)

References 15 publications

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“…The relatively high temperatures (in the range of 713 K and 853 K (440°Cand 580°C)) applied in the multi-step homogenization treatment caused the dissolution of the fine cubic a-Al 15 (FeMn) 3 Si 2 dispersoids [22] and the subsequent formation of Al 3 Fe particles. [23] The large population of grain boundaries within the near-surface layer was likely to promote the mobility of alloying atoms and, therefore, the a-Al 15 (FeMn) 3 Si 2 phase dissolution kinetics. The dissolved Fe atoms within the near-surface region diffused toward the newly formed Al 3 Fe particles, resulting in the coarsening of the particles in the near-surface region of the homogenized strip.…”

Section: B Homogenized Stripmentioning

confidence: 99%

“…[21] The influence of the local population densities of the oxide/lubricant particles on the thermal stability of the near-surface layer has not been reported. Although elemental redistribution and intermetallic phase transformation in the bulk of continuously cast AlFeMnSi alloys during high temperature annealing has been reported previously, [22,23] the response of intermetallic precipitates in the near-surface layers of TRC aluminum alloys to the homogenization treatment has yet to be investigated. The subsequent influence on the evolution of the near-surface layers during homogenization is unknown.…”

Section: Introductionmentioning

confidence: 97%

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Microstructure Evolution in the Near-Surface Region During Homogenization of a Twin-Roll Cast AlFeMnSi Alloy

Wang

Zhou

Thompson

et al. 2016

Metall Mater Trans A

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A near-surface deformed layer, comprising ultrafine grains of 50-500 nm diameters with the grain boundaries being decorated by a high population density of fine cubic a-Al 15 (FeMn) 3 Si 2 dispersoids and oxide/lubricant particles, was generated in a foil stock AlFeMnSi alloy during twin-roll casting due to severe shear deformation within the near-surface region. During a subsequent multi-step homogenization treatment at temperatures in the range of 713 K and 853 K (440°C and 580°C), the fine cubic a-Al 15 (FeMn) 3 Si 2 dispersoids within the near-surface layer were dissolved, while sparse, large lath-shaped Al 3 Fe particles formed in the same region. Significant grain growth took place within the near-surface layer due to the loss of grain boundary pinning by the dispersoids, leading to the removal of the ultrafine-grained microstructure within the near-surface region. However, at local regions where the population density of oxide particles was sufficiently high to provide grain boundary pinning, the ultrafine-grained microstructure was preserved within the near-surface layer.

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Section: B Homogenized Stripmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Microstructure Evolution in the Near-Surface Region During Homogenization of a Twin-Roll Cast AlFeMnSi Alloy

Wang

Zhou

Thompson

et al. 2016

Metall Mater Trans A

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“…Bobzin et al [58] Laser glazing of tool steels has been investigated [60] but the beneficial surface layer did not persist at the temperatures involved for thixoforming steels. Birol [61,62] has investigated the performance of nickel-based IN617 and of a CrNiCo alloy as die materials but with limited success. He also showed that an increase in the die bulk temperature from 450C to 550˚C gives a very favourable effect from a thermal fatigue point of view [63].…”

Section: Tools and Forming Diesmentioning

confidence: 99%

“…Birol [61,62] has investigated the performance of nickel-based IN617 and of a CrNiCo alloy as die materials but with limited success. He also showed that an increase in the die bulk temperature from 450C to 550˚C gives a very favourable effect from a thermal fatigue point of view [63].…”

Section: Tools and Forming Diesmentioning

confidence: 99%

A review on steel thixoforming

Rassili

Atkinson

2010

Transactions of Nonferrous Metals Society of China

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Abstract：Steel is a particularly challenging material to semi-solid process because of the high temperatures involved and the potential for surface oxidation. Here the experience of semi-solid processing will be reviewed and the current situation in relation to commercial application assessed. The review will include discussion of the range of potential steel materials which are amenable to thixoformingn and identification of suitable steels; modelling of die fill and rheological properties of semi solid steel; technology considerations for industrialisation; die development and the properties of thixoformed products.

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“…9,10) Specially prepared semi-solid slurry having near spherical primary solid particles plays a pivotal role towards the success story of SSM. [11][12][13] There are several variants of semisolid forming processes, reported in archived literature such as thixocasting, rheocasting, rheomoulding, and thixomoulding. All the above methods require prior semisolid slurry preparation.…”

Section: Introductionmentioning

confidence: 99%

Phase Field Simulation of Equiaxed Microstructure Formation during Semi-solid Processing of A380 Al Alloy

et al. 2014

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A phase field modelling approach is implemented in the present study towards simulation of microstructure evolution during cooling slope semi solid slurry generation process of A380 Aluminium alloy. First, experiments are performed to evaluate the number of seeds required within the simulation domain to simulate near spherical microstructure formation, occurs during cooling slope processing of the melt. Subsequently, microstructure evolution is studied employing a phase field method. Simulations are performed to understand the effect of cooling rate on the slurry microstructure. Encouraging results are obtained from the simulation studies which are validated by experimental observations. The results obtained from mesoscopic phase field simulations are grain size, grain density, degree of sphericity of the evolving primary Al phase and the amount of solid fraction present within the slurry at different time frames. Effect of grain refinement also has been studied with an aim of improving the slurry microstructure further. Insight into the process has been obtained from the numerical findings, which are found to be useful for process control.

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Wear properties of thixoformed AlSiCuFe alloys

Cited by 27 publications

References 15 publications

Microstructure Evolution in the Near-Surface Region During Homogenization of a Twin-Roll Cast AlFeMnSi Alloy

Microstructure Evolution in the Near-Surface Region During Homogenization of a Twin-Roll Cast AlFeMnSi Alloy

A review on steel thixoforming

Phase Field Simulation of Equiaxed Microstructure Formation during Semi-solid Processing of A380 Al Alloy

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