Effect of Shortened Heat Treatment on the Hardness and Microstructure of 320.0 Aluminium Alloy

Pezda, J.

doi:10.2478/afe-2014-0031

Cited by 8 publications

(6 citation statements)

References 10 publications

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“…Smaller phase size led to enhance the strength of the material, based on the literature. [56][57][58] However, the density of Al-Cu phase increased in the nanocomposite.…”

Section: Heat Treatmentmentioning

confidence: 99%

Fabrication of heat-treated nano-clay-composite for improving high-cycle fatigue properties of AlSiCu aluminum alloy under stress-controlled fully-reversed bending loads

Sharifi

Azadi

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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In the present article, a heat-treated nano-clay-composite was fabricated by stir-casting to improve high-cycle bending fatigue properties of AlSiCu aluminum alloys, which have been widely used in engine cylinder-heads. For such an objective, after ball milling of nano-clay-particles with micro-copper-particles, these coated particles were added to the aluminum melt and cylindrical specimens were stir-casted. Then, fully-reversed stress-controlled fatigue testing was performed on standard samples. In addition, the fracture surface was examined by the field-emission scanning electron microscopy to find failure mechanisms. Obtained results showed that reinforcements, including nano-clay-particles and the heat treatment increased the fatigue lifetime, at least 9%. Such an improvement in the fatigue lifetime was 125% under low values of the stress level. Due to have a proper distribution of nano-particles in the aluminum matrix, the scatter-band for the fatigue lifetime was narrower in the heat-treated nano-composite. The endurance fatigue limit was also improved 30% at 106 cycles, for the heat-treated nano-composite, comparing to the base material. The brittle fracture was observed due to have cleavage and quasi-cleavage marks on the fracture surface for both materials. Micro-cracks were initiated and propagated from Si and intermetallics phases.

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“…Smaller phase size led to enhance the strength of the material, based on the literature. [56][57][58] However, the density of Al-Cu phase increased in the nanocomposite.…”

Section: Heat Treatmentmentioning

confidence: 99%

Fabrication of heat-treated nano-clay-composite for improving high-cycle fatigue properties of AlSiCu aluminum alloy under stress-controlled fully-reversed bending loads

Sharifi

Azadi

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Chemical composition of the 320.0 alloy [17] Chemical composition / mass % Analysis of the chemical composition was performed using an optical emission spectrometry method, with inductively coupled plasma on the PerkinElmer optical emission spectrometer, Optima 4300 Dv model, in the Bosmal R&D Institute in Bielsko-Biala. Investigated alloy was melted in electric resistance furnace and was subjected to treatment of refining (Rafal 1 -0,4%).…”

Section: Methodology Of the Researchmentioning

confidence: 99%

Effect of Shortened Heat Treatment on Change of the Rm Tensile Strength of the 320.0 Aluminum Alloy

Pezda¹

2015

Archives of Foundry Engineering

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Mechanical and technological properties of castings made from 3xx.x alloys depend mainly on properly performed process of melting and casting, structure of a casting and mould, as well as possible heat treatment. Precipitation processes occurring during the heat treatment of the silumins containing additives of Cu and/or Mg have effect on improvement of mechanical properties of the material, while choice of parameters of solutioning and ageing treatments belongs to objectives of research work performed by a number of authors. Shortened heat treatment, which is presented in the paper assures suitable mechanical properties (Rm), and simultaneously doesn’t cause any increase of production costs of a given component due to long lasting operations of the solutioning and ageing. Results of the research concern effects of the solutioning and ageing parameters on the Rm tensile strength presented in form of the second degree polynomial and illustrated in spatial diagrams. Performed shortened heat treatment results in considerable increase of the Rm tensile strength of the 320.0 alloy as early as after 1 hour of the solutioning and 2 hours of the ageing performed in suitable.

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“…The cost and time of such a type of treatment are of fundamental importance, and the reduction of parameters of the T6 heat treatment process has a beneficial effect on manufacturing costs and productivity [ 4 , 27 , 28 , 29 ]. Many authors have carried out studies aimed to determine the effects of parameters of solutioning and aging treatments on mechanical properties and the microstructure of cast AlSi7Mg alloy [ 30 , 31 , 32 ].…”

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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Effect of Shortened Heat Treatment on the Hardness and Microstructure of 320.0 Aluminium Alloy

Cited by 8 publications

References 10 publications

Fabrication of heat-treated nano-clay-composite for improving high-cycle fatigue properties of AlSiCu aluminum alloy under stress-controlled fully-reversed bending loads

Fabrication of heat-treated nano-clay-composite for improving high-cycle fatigue properties of AlSiCu aluminum alloy under stress-controlled fully-reversed bending loads

Effect of Shortened Heat Treatment on Change of the Rm Tensile Strength of the 320.0 Aluminum Alloy

Optimization of Heat Treatment Parameters of AlSi7Mg Alloy

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