Ageing behaviour of 2024-Al alloy reinforced with Al2O3 particles

Abdel-Azim, A.N.; Shash, Ahmed Y.; Samadi, Mostafa; Younan, A. F.

doi:10.1016/0924-0136(95)01946-4

Cited by 16 publications

(11 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They explained this phenomenon by insufficient density of vacancies, dislocation and segregation of alloying elements on matrix-reinforcement interface. Similar observations regarding age-hardening kinetics were made by other authors [15][16][17]. Furthermore, there are reports in which no discrepancies, in the age-hardening kinetics, between reinforced and unreinforced alloys were noted [18].…”

Section: : α(Sst) → Mg/ Si Clusters → Gp Zones → β" → β' → β (Mg 2 Si)supporting

confidence: 75%

See 1 more Smart Citation

Aging Behaviour Of AA6061/SiCP Composites Produced By Direct Extrusion With A Reversibly Rotating Die Method

Woźniak¹,

Kostecki²,

Broniszewski³

et al. 2015

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

This paper discusses the influence of thermal treatment parameters on mechanical properties of AA6061+x% vol. SiCp (x = 0, 2.5, 5, 7.5, 10) composites. The composites were consolidated via powder metallurgy processing using the unconventional method of extrusion (the koBo method). In order to establish the optimum parameters of the heat treatment two different temperatures of supersaturation (530 and 558 o C) were applied. The aging curves were determined at various aging temperatures such as 140, 160, 180 and 200 o C. The effects of applied parameters were studied using the microstructure observations and hardness measurements. Obtained results show that the solution treatment at 530 o C is sufficient to complete dissolution of the precipitates. Higher temperature of the process resulted in accelerating the aged-hardening. The suitable age treating parameters for the AA6061-5 vol. % SiCp composites were 160 -180 o C for 12 -16 hours.

show abstract

Section: : α(Sst) → Mg/ Si Clusters → Gp Zones → β" → β' → β (Mg 2 Si)supporting

confidence: 75%

“…Another reason for slower aging kinetics of composites is presence of voids on matrixreinforcement interface. Coming back to aging kinetics, in other studies, different conclusions were reached [13][14][15][16][17][18]. The authors observed acceleration of aging kinetics with an increase of reinforcement volume fraction.…”

Section: Ageing Kineticsmentioning

confidence: 89%

Aging Behaviour Of AA6061/SiCP Composites Produced By Direct Extrusion With A Reversibly Rotating Die Method

Woźniak¹,

Kostecki²,

Broniszewski³

et al. 2015

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

show abstract

“…It was due to inadequate dislocation density, lower vacancy concentration, and extensive interfacial segregation of alloying elements. A similar report was made for Al alloys/ Al 2 O 3 composites [36,37]. The aging kinetics of alloys and composites depends on the type and proportion of reinforcements, heat treatment, alloy composition, and other process parameters [35].…”

Section: Introductionsupporting

confidence: 53%

The effect of solution treatment on aging behavior and mechanical properties of AA2024-TiB2 composite synthesized by semi-solid casting

Cheneke

Karunakar

2019

SN Appl. Sci.

View full text Add to dashboard Cite

AA2024 reinforced with varying amounts of titanium boride (TiB 2) was developed using stir rheocasting to study the effect of solution heat treatment on aging behavior and mechanical properties. The developed specimens were subjected to solution heat treatment at 490 °C for 1, 2.5, and 5 h, followed by artificial aging at 190 °C for an aging duration of 1-12 h. The metallurgical characterization was done by x-ray diffraction, optical microscopy, and field emission scanning electron microscope and mechanical characterization by Vickers hardness tester and universal testing machine. Microstructural observation showed the formation of globular grains and fairly uniform particle distribution. Up on peak aging, the AA2024/2 wt% TiB 2 composite has shown better improvement in yield strength (YS = 230 MPa), tensile strength (UTS = 342 MPa), and Vickers hardness (VH = 147) amongst other developed specimens. The improvement in mechanical properties of AA2024/2 wt% TiB 2 composite up on peak aging was nearly 83%, 77%, and 20%, respectively, over their as-cast states. However, the percent elongation has decreased by 51% for the AA2024/2 wt% TiB 2 composite against its as-cast state. The optimum solution heat treatment time was found to be 2.5 h that led to the fastest aging kinetics and peak hardness. Due to incomplete dissolution of precipitates at a solution treating time less than 2.5 h, the hardness decreased, and the aging kinetics decelerated. The aging kinetics further accelerated with increasing solution heat treating time beyond 2.5 h, but the hardness decreased due to grain growth of the matrix.

show abstract

“…Such age hardening behaviour was demonstrated with different combinations of matrices and reinforcements. While some studies show that the addition of reinforcement leads to an acceleration of the ageing kinetics [1][2][3][4], some others conclude a decrease or very little alteration in ageing kinetics of the base alloy with reinforcement addition [5][6][7][8]. In one of the studies on A356/SiC composites, the decrease in ageing kinetics was attributed to the depletion of Mg in the form of a spinel, MgAlO 4 [9].…”

Section: Introductionmentioning

confidence: 97%