Effect of heat treatment on microstructure and tensile properties of A356 alloys

Peng, Jihua; Tang, Xiaolong; He, Jim; Xu, Dapeng

doi:10.1016/s1003-6326(11)60955-2

Cited by 79 publications

(26 citation statements)

References 17 publications

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“…Comparing with standard process of the solutioning for 6 hours, 30 minutes of the solutioning at temperature 540 and 550 °C is sufficient to reach more than 90 % of the R 0,2 and not more than 95 % of the R m . Similar mechanical properties were obtained by Peng [17], however after solutioning at 550 o C for 2 hours and ageing at 170 o C also for 2 hours. On the basis of the above results it can be ascertained that there exist a pretty big discrepancies concerning ranges of the temperature and duration of the solutioning and ageing operations, however, shortening of these durations is possible without any considerable effect on obtained mechanical properties of the 356.0 aluminum alloy.…”

Section: Introductionsupporting

confidence: 70%

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: Introductionsupporting

confidence: 70%

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

Pezda¹,

Jarco²

2016

Archives of Foundry Engineering

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“…The amount of Mg element in as‐cast A356.2 alloy is about 0.356 wt% and it mainly exists in the form of Mg 2 Si phase. As a strengthening phase, Mg 2 Si will dissolve during solution treatment and the diffusion of Mg into α ‐Al dendrite will improve the mechanical properties of A356 alloys …”

Section: Discussionmentioning

confidence: 99%

“…However, even though alloys are treated by refiners and modifiers, distribution of elements is still heterogeneous and morphology of eutectic silicon needs further improvement . For these reasons, T6 heat treatment is comprehensively applied to optimize the morphology of eutectic silicon and improve the UTS, YS, and EL of the alloys . Meanwhile, short T6 heat treatment could minimize grain growth of α ‐Al in A356 alloy and decrease dimension of eutectic silicon, which is beneficial to the enhancement of mechanical properties …”

Section: Introductionmentioning

confidence: 99%

Effect of Solution Treatment on Microstructure and Mechanical Properties of A356.2 Aluminum Alloy Treated With Al–Sr–La Master Alloy

Ding

Miao

et al. 2018

Adv Eng Mater

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Morphology and mechanical performances of A356.2 aluminum alloy under solution treatment are important for its application, specifically for alloys treated with newly-developed combined refiner-modifier. In this work, effect of solution temperature, solution time, and quenching medium temperature on the microstructure and mechanical properties of A356.2 aluminum alloy treated with Al-6Sr-7La master alloy are investigated. Results show that eutectic silicon undergo disintegration, spheroidization, and coarsening stages with solution temperature increasing. Volume fraction of eutectic silicon decreases gradually with solution temperature increasing from 495 to 550 C, while secondary dendritic arm spacing (SDAS) increases gradually during this process. At the solution temperature of 540 C, aspect ratio of eutectic silicon approached to about 1.3 and eutectic silicon undergo spheroidization and coarsening stages with extension of solution time. Moreover, SDAS increases with increasing of quenching medium temperature, which affects the ultimate tensile strength (UTS), yield strength (YS), and elongation (EL) of the alloy, especially for tensile strength and elongation. Optimal solution parameters for A356.2 aluminum alloy treated with Al-6Sr-7La are obtained and the reasons are discussed.

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“…There have been few studies on the influence of heat treatment on the microstructure and properties of this alloy. Most of them have been based on the solid solution treatment, which controls the grain size of the alloy and improves its mechanical properties [2][3][4][5]. For example, Gong et al [6] considered that the solution temperature has a significant effect on the mechanical properties of the alloy at room temperature and its grain size, the effect of holding time is not obvious, and the increase in temperature mainly affects its plasticity.…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Heat Treatment on the Microstructure and Properties of Alloy 800H

Zhang

Jiang

et al. 2019

Metals

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The effects of laser heat treatment on the microstructure and properties of alloy 800H were investigated. The fracture morphology, elemental changes, and phase composition of the specimens were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffractometry (XRD). The results show that the long-lasting life of the specimen after laser heat treatment increased by 28.6%, and the elongation after fracture increased by 20.7%. The macroscopic morphology of the fracture specimen exhibited obvious ductile fracture morphology, and the changes in the elemental content and grain size significantly affected the ductility and toughness of the alloy. This study has certain guiding significance for the optimization of the heat treatment process of this type of alloy.

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Effect of heat treatment on microstructure and tensile properties of A356 alloys

Cited by 79 publications

References 17 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

Effect of Solution Treatment on Microstructure and Mechanical Properties of A356.2 Aluminum Alloy Treated With Al–Sr–La Master Alloy

Effect of Laser Heat Treatment on the Microstructure and Properties of Alloy 800H

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