Alternatives to the Al–Si Eutectic System in Aluminum Casting Alloys

Koutsoukis, Theodoros; Makhlouf, Makhlouf M.

doi:10.1007/s40962-016-0042-6

Cited by 42 publications

(22 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The hot tear susceptibility (HTS) was measured by using an N-Tec Hot tear test mold [42,43], which consists of five 'dog bone' sections with different lengths, constrained at each end with a hot spot along their length. The HTS test mold was coated with boron nitride and preheated to 250 0 C. HTS values were calculated using equation (1).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Ni on the microstructure, hot tear and mechanical properties of Al–Zn–Mg–Cu alloys under as-cast condition

Liu

Zhu

2020

Journal of Alloys and Compounds

View full text Add to dashboard Cite

The effects of Ni on the phases, microstructural evolution, hot tear susceptibility and mechanical properties of Ale6Zn-1.4Mg-1.2Cu alloys fabricated by gravity casting were investigated using X-ray diffraction (XRD), scanning electronic microscopy (SEM), optical microscopy, the N-Tec Hot tear and tensile test. The calculation of phase diagrams (CALPHAD) modelling was also conducted to understand the phase formation of the experimental alloys. The results showed that the secondary phases (including h-MgZn2,SeAl2CuMg and Al3Ni) are mainly distributed at grain boundary, while round SeAl2CuMg particles are also found in a-Al matrix. Ni only exists as Al3Ni with different morphologies and its number density ascends with the increase of Ni content in alloys, which also significantly improves the hot tear resistance. As a result, the increased Ni in the alloys remarkably improves the ultimate tensile and yield strength, while the elongation increases when Ni < 0.6 wt% followed by decreases when Ni > 0.6 wt%.

show abstract

Section: Methodsmentioning

confidence: 99%

“…Where Li is the length indexing of the dog bone where the crack appeared and Ci is the severity indexing of the crack, and their indexing values can be found in Refs. [42,43].…”

Section: Methodsmentioning

confidence: 99%

Effects of Ni on the microstructure, hot tear and mechanical properties of Al–Zn–Mg–Cu alloys under as-cast condition

Liu

Zhu

2020

Journal of Alloys and Compounds

View full text Add to dashboard Cite

show abstract

“…On the other hand, there is an increasing interest in Al-Fe alloys for applications demanding high electrical conductivity [5,6] and/or good thermal stability [7]. At room temperature and up to 2 wt.% Fe, the maximum decrease in conductivity is only of 8.1% [8], and even after 8 h at 500 °C of solubilization treatment, the stability of the plate-like Al3Fe phase is maintained, without significant changes in the morphology [9].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Refinement and Improvement of Microhardness of a Hypoeutectic Al–Fe Alloy Treated by Laser Surface Remelting

Oliveira

Kakitani

Cangerana

et al. 2020

2nd Coatings and Interfaces Web Conference (CIWC-2 2020)

View full text Add to dashboard Cite

In laser surface remelting (LSR) treatment, only a small region is affected by heat, surpassing the melting temperature, followed by rapid cooling at 103–108 K/s, thus producing an extremely refined microstructure. The treated region shows a more homogeneous microstructure and better mechanical properties as compared to the substrate. Iron is a common impurity found in Al-based alloys but in the 2618 commercial alloy, around 1 wt.% of Fe is intentionally added to improve the high temperature strength and the corrosion resistance. In this work, LSR experiments were performed, by using a CO2 laser operating in a continuous-wave mode, to investigate the influence of process parameters on the treated surface of an as-cast Al-1 wt.% Fe alloy. These parameters encompass work distance (z), laser beam speed (v) and laser average power (P), setting a total of 18 combinations. The configuration of z = 6 mm, v = 500 mm/s and P = 800 W resulted in a molten pool with 710 µm of width for 242 µm of length without major porosities, therefore being the largest stable pool amongst all parameter combinations. The resulting cellular microstructure is shown to have an average interphase spacing of 0.93 ± 0.17 µm, a decrease of about 14 times in relation to that of the substrate. The effects of LSR on microhardness were remarkable, with the remelted track presenting Vickers microhardness of 50.1 ± 2 HV, which corresponds to increase of about 43% as compared to that of the original substrate.

show abstract

“…[2][3][4] Al-Si-based alloys (typically A365) are commonly used in automotive cast components owing to their excellent castability and high mechanical strength (YS ≥ 175 MPa). However, these Al alloys present a low EC (≤40% IACS), [5] which renders them less suitable as conductor alloys. Al-Fe-based alloys exhibit excellent castability with high EC (%53% IACS), but at the expense of low mechanical strength.…”

mentioning

confidence: 99%

Enhanced Mechanical Strength and Electrical Conductivity of Al–Ni‐Based Conductor Cast Alloys Containing Mg and Si

Algendy,

Javidani,

Khangholi

et al. 2023

Adv Eng Mater

View full text Add to dashboard Cite

The electrical conductivity (EC), mechanical strength, hot tearing susceptibility (HTS), and related microstructure of Al–xNi–0.55Mg–0.55Si conductor alloys (x = 1–4 wt%) are investigated. Adding Mg and Si into Al–Ni‐based alloys, numerous β″/β′ precipitate after T5 and T6 treatments, thus significantly improving the EC and mechanical strength. The HTS of the alloys reduces significantly as the Ni content increases, mainly because of an increase in the eutectic Al–Al3Ni and a reduction in the grain size. Under T5 condition, the tensile strengths increase gradually with the Ni content and reach a medium strength level, with yield strength (YS) of 158–205 MPa and EC of 47.1–50.7% IACS. After applying T6, all alloys achieve a high strength, with YS of 246–287 MPa and EC of 47.7–51.1% IACS. However, the strength decreases with increasing Ni content. In general, the Al3Ni–0.55Mg–0.55Si alloy presents a better trade‐off among HTS, YS, and EC among the four alloys investigated. Due to its excellent properties (EC of 49.4% IACS and YS of 178 MPa in T5, and EC of 49.7% IACS and YS of 250 MPa in T6), the Al3Ni–0.55Mg–0.55Si alloy is a promising material for the fabrication of Al conductor cast alloys.

show abstract

Alternatives to the Al–Si Eutectic System in Aluminum Casting Alloys

Cited by 42 publications

References 9 publications

Effects of Ni on the microstructure, hot tear and mechanical properties of Al–Zn–Mg–Cu alloys under as-cast condition

Effects of Ni on the microstructure, hot tear and mechanical properties of Al–Zn–Mg–Cu alloys under as-cast condition

Microstructural Refinement and Improvement of Microhardness of a Hypoeutectic Al–Fe Alloy Treated by Laser Surface Remelting

Enhanced Mechanical Strength and Electrical Conductivity of Al–Ni‐Based Conductor Cast Alloys Containing Mg and Si

Contact Info

Product

Resources

About