Microstructural and Mechanical Characterization of Al-0.80Mg-0.85Si-0.3Zr Alloy

Kahrıman, Fulya; Zeren, Muzaffer

doi:10.1515/afe-2017-0133

Cited by 6 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These elongated dispersoids were identified as the DO22-(Al,Si)3Zr phase by TEM with energydispersive X-ray spectroscopy (EDS) and the corresponding SADP [36]. The DO22-(Al,Si)3Zr dispersoid possesses a tetragonal crystal structure and is mainly precipitated at high temperatures in 6xxx alloys [17,37,38]. The coarse DO22 dispersoids also appeared to align along <001> Al, suggesting that their appearance was closely related to the pre-existing L12 dispersoids (Fig.…”

Section: The Transformation Of L1 2 To Do 22mentioning

confidence: 99%

Nucleation and transformation of Zr-bearing dispersoids in Al–Mg–Si 6xxx alloys

Elasheri

Elgallad

Parson

et al. 2022

Journal of Materials Research

View full text Add to dashboard Cite

The nucleation and transformation of L12-Al3Zr and DO22-(Al,Si)3Zr dispersoids in Al-Mg-Si 6xxx alloys were studied using interrupted quenching and transmission electron microscopy. Spherical L12-Al3Zr dispersoids precipitated preferentially along <001>Al in early stages of nucleation, coinciding with the same sites and orientation of β' precipitates that dissolved during heating. Two nucleation mechanisms were suggested to explain this preferable precipitation. At a relatively low heat treatment temperature (400 °C), the L12-Al3Zr dispersoids were predominant, and no transformation occurred. With further increase in temperature to 550 °C, the L12-Al3Zr dispersoids started to transform into DO22-(Al,Si)3Zr. At high temperatures, elongated DO22-(Al,Si)3Zr dispersoids, which were formed through the transformation of pre-existing L12 dispersoids rather than the direct precipitation from the supersaturated aluminum solid solution, became the dominant phase.

show abstract

Section: The Transformation Of L1 2 To Do 22mentioning

confidence: 99%

Nucleation and transformation of Zr-bearing dispersoids in Al–Mg–Si 6xxx alloys

Elasheri

Elgallad

Parson

et al. 2022

Journal of Materials Research

View full text Add to dashboard Cite

show abstract

“…More specifically the number of needle-like Si is less because some portion move to form the primary Si. Due to ageing, different types of precipitation arise within the matrix, but these fine precipitates cannot be exposed via this type of photography [41]. The fracture surface of the base alloy with 0.2Si exhibits a huge number of voids which is randomly distributed in the matrix of the alloy as shown in Figure 7(a).…”

Section: Optical Microstructurementioning

confidence: 99%

Mechanical properties of hypoeutectic, eutectic, and hypereutectic Al-Si automotive alloys under ageing treatment

Ahammed,

Razin,

Khan

et al. 2024

Eng. rev. (Online)

View full text Add to dashboard Cite

The role of different levels of silicon on mechanical properties has been investigated through tensile and impact tests along with fractography of Al-Si automotive alloys. Cast alloys are given precipitation strengthening through T6 heat treatment. It has been experimentally determined that ageing these alloys leads to the enhancement of tensile properties, which is mainly caused by the precipitation of the intermetallics such as Al2Cu, Mg2Si, and Al2CuMg within the Al-matrix. The ductility of these alloys primarily exhibit a diminishing trend as the ageing temperature increased. This diminishing trend can be attributed to the formation of fine precipitates like GP zones and metastable phases. However, after reaching a certain temperature, the ductility started to increase again. This is caused by the coarsening of the precipitates. At higher strain rates, the tensile strength is found to be identical for higher Si-added alloys due to their brittleness. The microstructures of the alloys reveal that as Si content increases, eutectic phases become more apparent. Fractography of the base alloy exhibits a small dimple structure, and higher Si-added alloys initiate the crack propagation. Beyond eutectic composition, the mechanical properties of the alloys became distorted due to block-like primary Si into the Al-matrix.

show abstract

“…A high strength-to-weight ratio and the ability to withstand high temperatures are typical requirements for the manufacture of various mechanical structures. Aluminium alloys possess a number of these distinctive properties that make them suitable for a wide range of applications, including the automotive, aerospace, and military industries [1][2][3]. For example, engine blocks, piston heads, steering boxes, inlet manifolds, rocker covers, deferential casings, brackets, and wheels are among the many components made from aluminium casting in the automotive industry [4].…”

Section: Introductionmentioning

confidence: 99%

Archives of Foundry Engineering

Sirata,

Wacławiak,

Dyzia

2022

View full text Add to dashboard Cite

Aluminium alloys have low density and good mechanical properties, making them suitable for the manufacture of mechanical structures where low weight is critical. However, when these alloys are subjected to elevated temperatures, their mechanical properties deteriorate significantly. The aim of this study is to investigate the effect of temperature on the mechanical properties of aluminium alloy, EN AC-Al Si12CuNiMg. For this purpose, an experimental investigation was performed at ambient and elevated temperatures on aluminium alloy samples prepared by casting. Tensile and hardness tests were carried out to characterize the mechanical properties of this material. Additionally, an optical microscope was used to examine the microstructures of this alloy. Finally, a scanning electron microscope was used to analyze the fracture modes of this material. The results show that the mechanical properties such as tensile strength, yield strength, and Young's modulus of this alloy dramatically decrease when the temperature exceeds 250C. The microstructural investigation reveals several factors that are detrimental to the mechanical properties of this alloy. This includes coarse-grained structures, micro-pores, and several intermetallic compounds. Furthermore, fractography reveals a minor cleavage-like pattern and micro-cracks on the fracture surface of all failed samples under various temperatures, indicating semi-brittle fracture mode.

show abstract

Microstructural and Mechanical Characterization of Al-0.80Mg-0.85Si-0.3Zr Alloy

Cited by 6 publications

References 20 publications

Nucleation and transformation of Zr-bearing dispersoids in Al–Mg–Si 6xxx alloys

Nucleation and transformation of Zr-bearing dispersoids in Al–Mg–Si 6xxx alloys

Mechanical properties of hypoeutectic, eutectic, and hypereutectic Al-Si automotive alloys under ageing treatment

Archives of Foundry Engineering

Contact Info

Product

Resources

About