Effect Of The T6 Heat Treatment On Change Of Mechanical Properties Of The AlSi12CuNiMg Alloy Modified With Strontium

Pezda, J.

doi:10.1515/amm-2015-0183

Cited by 15 publications

(14 citation statements)

References 9 publications

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“…Measurement of the temperature was performed continuously with use of Ni-NiCr thermoelements of type K, with accuracy  5 o C directly in chamber of the furnace. After performed heat treatment, the test pieces to measurement of the tensile strength R m and elongation A 5 Determination of the impact strength of casting alloys was made basing on the simplified method [20], with use of the Charpy pendulum machine, with use of the test pieces having incised cylindrical notch. In such case, the impact strength denotes ratio of the work used to rupture of the test piece (in J) to surface area of cross section in place of the notch (in cm 2 ).…”

Section: Fig 1 Atd Diagram Of the Investigated Alloymentioning

confidence: 99%

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Effect of T6 Heat Treatment Parameters on Technological Quality of the AlSi7Mg Alloy

Pezda¹,

Jarco²

2016

Archives of Foundry Engineering

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Very well-known advantages of aluminum alloys, such as low mass, good mechanical properties, corrosion resistance, machining-ability, high recycling potential and low cost are considered as a driving force for their development, i.e. implementation in new applications as early as in stage of structural design, as well as in development of new technological solutions. Mechanical and technological properties of the castings made from the 3xx.x group of alloys depend mainly on correctly performed processes of melting and casting, design of a mould and cast element, and a possible heat treatment. The subject-matter of this paper is elaboration of a diagrams and dependencies between parameters of dispersion hardening (temperatures and times of solutioning and ageing treatments) and mechanical properties obtained after heat treatment of the 356.0 (EN AC AlSi7Mg) alloy, enabling full control of dispersion hardening process to programming and obtaining a certain technological quality of the alloy in terms of its mechanical properties after performed heat treatments. Obtained results of the investigations have enabled obtainment of a dependencies depicting effect of parameters of the solutioning and ageing treatments on the mechanical properties (R m , A 5 and KC impact strength) of the investigated alloy. Spatial diagrams elaborated on the basis of these dependencies enable us to determine tendencies of changes of the mechanical properties of the 356.0 alloy in complete analyzed range of temperature and duration of the solutioning and ageing operations.

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Section: Fig 1 Atd Diagram Of the Investigated Alloymentioning

confidence: 99%

“…Likewise, the author of this paper has conducted research work from this area [4][5][6]. Normally, the ASTM B917-01 standard, for the 356.0 alloy specifies solutioning time of 6-12 hours at temperature 540 o C, cooling in warm water, and next 2-5 hours at temperature 155 o C, for a castings from sand mould [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of T6 Heat Treatment Parameters on Technological Quality of the AlSi7Mg Alloy

Pezda¹,

Jarco²

2016

Archives of Foundry Engineering

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“…Age-hardenable Al-Si alloys can be used for this purpose; these alloys have good castability due to the presence of a eutectic constituent. Al-Si alloys can be alloyed with Cu and Mg to promote their structural hardening by thermal treatment, rendering their use more favourable in applications with high structural requirements [3]. The thermal treatment consists of three stages.…”

Section: Introductionmentioning

confidence: 99%

A Trade-Off between Mechanical Strength and Erosive Wear Resistance in AlSi12CuMgNi Alloy Used to Manufacture Fan Blades for Underground Mines

Álvarez-Antolín

Segurado-Frutos

González-Pociño

et al. 2019

Metals

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The axial fan blades used in underground mines are usually manufactured in AlSi12CuMgNi alloy (EN AC 48000). They must have a high mechanical strength to withstand the stresses resulting from the rotation speed of the rotor and a high resistance to erosive wear caused by suspended particles from underground mining and transport operations. The aim of this paper is to determine the most suitable thermal treatment to simultaneously improve their mechanical strength and erosive wear resistance. To this end, two solution treatments at 525 °C with cooling in water were analysed, as well as several ageing times at 170 °C. The crystalline phases present in the as-cast state were quantified by X-ray diffraction following quenching and different ageing processes. Furthermore, erosion wear resistance was measured by means of compressed air blasting with corundum particles according to ASTM G76 (2004). The highest wear resistance was obtained in the as-cast state using gravity die casting, with the presence of Al4Cu2Mg8Si7 and Al3CuNi. This wear resistance was higher than that obtained after the ageing treatment. However, a trade-off between mechanical strength and wear resistance was observed after 12 h ageing, where the hardness obtained exceeded 160 HV and the wear resistance became similar to that obtained in the as-cast state.

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“…The disadvantage of near-eutectic Al-Si alloys is an irregular acicular or lamellar form of eutectic silicon precipitations [9] which conduce to the propagation of cracks due to external stresses, this has an adverse effect on the mechanical properties, and above all on the plasticity and impact strength of alloy [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Soft Annealing Treatment on Impact Strength and Hardness of the EN AC-AlSi11 Alloy

Jarco¹

2017

Archives of Foundry Engineering

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The paper presents research on the effects of soft annealing parameters on a change of the impact strength KC and Brinell hardness (HB) of the EN AC-AlSi11 alloy. The research has been performed according to the trivalent testing plan for two input parameterstemperature in the range between 280°C and 370°C and time in the range between 2 and 8 hours. The application of such heat treatment improves the plasticity of the investigated alloy. The improvement of the impact strength KC by 71% and the decrease of the hardness HB by 20% was achieved for the soft annealing treatment conducted at a temperature 370°C for 8 hours, compared to the alloy without the heat treatment. A change of the form of eutectic silicon precipitations which underwent refinement, coagulation and partial rounding, had a direct effect on the hardness HB and impact strength KC. The results obtained were used to prepare space plots enabling the temperature and time for soft annealing treatment to be selected with reference to the obtained impact strength KC and hardness HB of the alloy with the heat treatment.

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Effect Of The T6 Heat Treatment On Change Of Mechanical Properties Of The AlSi12CuNiMg Alloy Modified With Strontium

Cited by 15 publications

References 9 publications

Effect of T6 Heat Treatment Parameters on Technological Quality of the AlSi7Mg Alloy

Effect of T6 Heat Treatment Parameters on Technological Quality of the AlSi7Mg Alloy

A Trade-Off between Mechanical Strength and Erosive Wear Resistance in AlSi12CuMgNi Alloy Used to Manufacture Fan Blades for Underground Mines

Effect of Soft Annealing Treatment on Impact Strength and Hardness of the EN AC-AlSi11 Alloy

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