Effect of Heat Treatment Process and Optimization of Its Parameters on Mechanical Properties and Microstructure of the AlSi11(Fe) Alloy

Jarco, A.; Pezda, J.

doi:10.3390/ma14092391

Cited by 5 publications

(4 citation statements)

References 71 publications

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“…Based on the literature [13][14][15][16][17][18][19][20][21][22][23][24][25] and the author's own experiences, four variants of heat treatments were applied. Cooling after solution heat treatment was always applied in ambient temperature water.…”

Section: Methodsmentioning

confidence: 99%

“…It was confirmed in [14] that short-lived (1-6 min) annealing in ultra-high temperature ranges has a positive effect on spheroidization of eutectic silicon and other intermetallic phases, causing significant and desirable changes of mechanical properties. Works [15][16][17][18][19][20][21][22][23][24][25] also include interesting tests results concerning the impact of heat treatment on the properties of silumins.…”

Section: Introductionmentioning

confidence: 99%

“…In work [20] it was found that for a combustion engine cylinder head made of AlSi7Cu3Mg alloy, the optimal process of heat treatment, involves solutioning at a temperature of 500°C for 1 h, and then aging for 2 h at 175°C. The effects of T6 heat treatment (precipitation hardening) of the EN AC-AlSi11(Fe) alloy were presented in [21]. Correct selection of the artificial ageing and solution treatment parameters allows obtaining several dozen percent increases in hardness, elongation, tensile strength, and impact strength compared to the raw alloy.…”

Section: Introductionmentioning

confidence: 99%

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Archives of Foundry Engineering

Trepczyńska-Łent,

Műller

2021

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The study presents methods to be used for improving the performance parameters of car engine pistons made of EN AC-AlSi12CuNiMg alloy according to the PN-EN 1706: 2011. Pistons of slow sucking and turbocharged engines were researched. A solution heat and ageing treatments were applied according to four variants. Temperatures of the solution heat treatment were: 550 ±5°C; 510°C ±5°C; and alternate: 276 ±5°C/510 ±5°C. The solution time ranged from 6 min to 4 h. Temperatures of the ageing heat treatment were 20°C and 250°C, while the ageing time ranged from 1,5 to 3h. Natural ageing was performed in 5 days. Measurements of hardness HRB and the piston diameters were performed. An improvement in the performance parameters of combustion engines was observed. Three solution heat treatment and ageing variants, allowed to obtain the pistons with hardness equal/higher than pistons of the turbocharged engines. The test results confirmed the possibility of providing a piston with properties exceeding the high load parameters specified by the manufacturer. Further studies will make it possible to improve the effects of the proposed solutions.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Archives of Foundry Engineering

Trepczyńska-Łent,

Műller

2021

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“…The duration and temperature of solutioning, suitable cooling, and artificial aging [ 4 , 21 , 22 , 23 ] have a direct impact on the improvement of mechanical properties in terms of heat treatment. The ASTM B917-01 standard provides the saturation time of 6–12 h at 540 °C for 356.0 alloys, cooling in warm water, and then 2–5 h of aging at 155 °C, for sand mold castings [ 24 ], while in case of metal molds it provides 4–12 h of saturation at 540 °C and 2–5 h of aging at 15 °C [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Heat Treatment Parameters of AlSi7Mg Alloy

Pezda

2022

Materials

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Constantly growing requirements concerning the quality of poured machinery components give rise to the need to find new solutions to improve their mechanical and technological properties, considering economic and ecological aspects resulting from energy consumption of the casting and heat treatment processes. This study presents the investigation of the effect of heat treatment on mechanical properties (tensile strength Rm, elongation A5, hardness HBW) of the AlSi7Mg alloy without modification and modified with strontium. Obtained results allowed us to determine T6 heat treatment parameters associated with the improvement of mechanical properties of the alloy with simultaneous limitation of duration of solutioning and aging treatments. The maximum increase in Rm was 67%, and 55% in the case of HBW, with a slight decrease in elongation (approx. 10%) in relation to an alloy not subjected to heat treatment in the adopted scope of tests for the total time of heat treatment of 4–6 h. The increase in elongation of up to 250% requires aging at a temperature exceeding 300 °C, which also causes a decrease in durability and hardness by 20%. Modification of the alloy using strontium before heat treatment facilitates the process of fragmentation and balling of silicone precipitates.

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Improving density and strength-to-ductility ratio of a 3D-printed Al–Si alloy by high-pressure torsion

Muñoz,

Komissarov,

Avalos

et al. 2024

J Mater Sci

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Good combination of strength and ductility in metallic materials is always desired. To this end, this study assesses the combination of two modern manufacturing processes, namely additive manufacturing (AM) and severe plastic deformation, for an AlSi11Cu alloy. Laser powder bed fusion (L-PBF) produced an alloy with spherical pores with an average size of 42 μm, representing a volume fraction lower than 0.15%. At the mesoscale, the alloy showed a cellular microstructure made up of Al cells and Si-rich boundaries with an average size of 0.69 µm, which were broken down by the high-pressure torsion (HPT) process into ultrafine particles smaller than 0.41 µm. The HPT process transformed the columnar grains of the as-built material into ultrafine-grained grains around the disk edges, while the central zone conserved the as-built characteristics for a number of HPT turns smaller than ¼. HPT processing at room and warm temperatures gave rise to strength–ductility improvements with yield strengths and elongations larger than 400 MPa and 10%, respectively. The good strength–ductility trade-off was related to the porosity decrease, the breakdown of the interconnected network into particles of ultrafine size, the grain size reduction due to the dislocation density increase, and the formation of precipitates and Si-rich particles of different sizes. Thus, AM and HPT improved the grain boundary and precipitation strengthening, giving rise to an Al–Si alloy with superior mechanical properties. Graphical abstract

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Effect of Heat Treatment Process and Optimization of Its Parameters on Mechanical Properties and Microstructure of the AlSi11(Fe) Alloy

Cited by 5 publications

References 71 publications

Archives of Foundry Engineering

Archives of Foundry Engineering

Optimization of Heat Treatment Parameters of AlSi7Mg Alloy

Improving density and strength-to-ductility ratio of a 3D-printed Al–Si alloy by high-pressure torsion

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