Effect of Partial Substitution of Mn for Ni on Mechanical Properties of Friction Stir Processed Hypoeutectic Al-Ni Alloys

Yousefi, Fatemeh; Taghiabadi, R.; Baghshahi, Saeid

doi:10.1007/s11663-018-1422-5

Cited by 10 publications

(8 citation statements)

References 37 publications

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“…FSP also increases the density of dislocations in the SZ most of which have been annihilated during dynamic recrystallisation [34]. However, based on the previous findings, in addition to the dislocation networks along the sub-grain boundaries [34], considerable amounts of dislocations have remained in the SZ grains [35,36] whose interaction can improve the SZ strength through dislocation strengthening mechanism [28]. Increasing the number of FSP passes (i.e.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the refinement and more uniform distribution of these compounds in the matrix, similar to what is seen in Figure 3, can reduce the amplitude of the accumulated stress which in turn improve their resistance against fracture and/or de-bonding. In addition, the finely dispersed particles can more effectively impede the movement of dislocations, and their reduced interspacing significantly increases the stress required for dislocations motion [28,29]. Decreasing the grain size, and consequently, increasing the density of grain boundaries can also play a significant role in the overall mechanical properties improvement of coatings.…”

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

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Tribology of Si-rich TIG-deposited coatings on Zn–40Al–2Cu alloy

Rajabi

Taghiabadi

Shaeri

2020

Surface Engineering

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The effect of Zn-40Al-2Cu-xSi (x = 4 and 8 wt-%) tungsten inert gas (TIG) surfaced coatings and multi-pass friction stir processing (FSP) on the tribological properties of Zn-40Al-2Cu alloy was studied. The coatings had a well-modified microstructure comprising of finely dispersed primary Si particles (Si P ). These particles act as in-situ reinforcements, improving coating resistance against the friction-induced strains applied during sliding wear. The results of dry sliding wear showed that, at the applied pressures of 0.25, 0.5, and 0.75 MPa, the wear resistance of 4-pass FSPed coatings containing 4 wt-% Si is higher than that of the base alloy by 27, 47, and 57%, respectively. This can be attributed to the substrate strengthening and formation of compacted tribolayers on the surface of FSPed samples.

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Section: Resultsmentioning

confidence: 99%

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

Tribology of Si-rich TIG-deposited coatings on Zn–40Al–2Cu alloy

Rajabi

Taghiabadi

Shaeri

2020

Surface Engineering

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“…Nevertheless, it exhibits remarkable mechanical properties at elevated temperatures (up to 500 °C) owing to the existence of a thermally enduring intermetallic phase composed of Al 3 Ni (with a melting point of 854 °C) [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of heat treatment on microstructure of near-eutectic Al-Ni-Mn alloy, and determination of mechanical and thermoelectrical properties

Kaygısız

2024

Mater. Res. Express

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This study examined the impact of solution heat treatment on the microstructure, mechanical characteristics, thermophysical properties, and electrical resistivity of an Al-Ni-Mn near-eutectic alloy. The investigation focused on varying temperatures and holding periods. The composition of the Al-Ni-Mn near-eutectic alloy system was chosen as Al-5.3%Ni-1.0%Mn (wt). In the non-heat-treated sample, the matrix phase (-Al) is in equilibrium with the intermetallic Al9(Mn,Ni)2 and Al3Ni phases. The hardness value of the non-heat-treated sample (49.8 kg/mm2) increased to 70.1 kg/mm2 with 2 hours of solution heat treatment at 570oC and then 8 hours of artificial aging at 180oC. The hardness value increased by approximately 41%. TE: 651.81oC for the non-heat-treated sample and TE:648.79oC for the heat-treated sample. Fusion enthalpy (H) value was determined as 336.79 (J/g) for the non-heat-treated sample and 516.36 (J/g) for the heat-treated sample. Heat Capacity (Cpl) value was found to be 0.364 J/g.K for the non-heat-treated sample and 0.560 J/g.K for the heat-treated sample. The electrical resistivity value of the 2 hours’ solution heat-treated sample at 600oC reached its highest value.

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“…Al-Ni eutectic alloys exhibit excellent fluidity, excellent feedability, and low susceptibility to hot tearing [8]. However, it exhibits high mechanical properties at high temperatures thanks to its thermally stable Al3Ni intermetallic phase [9]- [11]. It is stated that in Al-Ni alloys, depending on sample processing and annealing conditions, the first phase to be formed will be Al3Ni [12]- [14], AlNi [15] or Al9Ni2 [11], [14], [16].…”

Section: Introductionmentioning

confidence: 99%

“…However, it exhibits high mechanical properties at high temperatures thanks to its thermally stable Al3Ni intermetallic phase [9]- [11]. It is stated that in Al-Ni alloys, depending on sample processing and annealing conditions, the first phase to be formed will be Al3Ni [12]- [14], AlNi [15] or Al9Ni2 [11], [14], [16]. Zuogui Zhang et al [2], in their study on the corrosion behavior of Al-5.4%Ni (wt) alloy, it was stated that preferential corrosion pits were formed in the Al phase area and that the more homogeneous and thinner Al/Al3Ni structure played a vital role in improving the corrosion resistance of the alloy.…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF HEAT TREATMENT ON CORROSION RESISTANCE OF Al-Ni-Mn EUTECTIC ALLOY IN 3.5% NaCl SOLUTION

KAYGISIZ

2023

KONJES

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In this study, the effects of solution heat treatment (SHT) on how the Al-Ni-Mn eutectic alloy reacts to corrosion were looked into. The composition of the Al-Ni-Mn eutectic alloy was chosen as Al–5.3%Ni–1.3%Mn (wt). In solution heat treatment, firstly, the samples were kept at 570oC and 600oC for 2 hours and quenched with water at room temperature. Then, artificial aging was carried out by keeping 0-2-4 and 8 hours at 180oC. The corrosion behavior of the alloy was investigated by immersion tests in a 3.5% NaCl solution and electrochemical methods such as Tafel polarization curves and Electrochemical Impedance Spectroscopy (EIS). According to the immersion test results, the heat treatment applied at 600oC took the alloy to the more noble side and further increased its corrosion resistance. The α-Al matrix phase in the Al-Ni-Mn alloy system preferentially dissolves in untreated and heat-treated samples, and SEM images reveal the presence of corrosion pits. The corrosion performance of the heat-treated sample at 570oC is the highest. Heat treatment reduced the corrosion current density, indicating a lower corrosion rate and higher corrosion resistance. Also, the open circuit potential of the Tafel polarization curves of heat-treated and unheat-treated samples at 570oC and 600oC was found to be -685 mV, -693 mV and -761 mV, respectively. Similarly, the corrosion resistance of heat-treated and untreated samples at 570oC and 600oC was found to be 58 kΩ, 433 kΩ and 408 kΩ, respectively.

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Effect of Partial Substitution of Mn for Ni on Mechanical Properties of Friction Stir Processed Hypoeutectic Al-Ni Alloys

Cited by 10 publications

References 37 publications

Tribology of Si-rich TIG-deposited coatings on Zn–40Al–2Cu alloy

Tribology of Si-rich TIG-deposited coatings on Zn–40Al–2Cu alloy

Effect of heat treatment on microstructure of near-eutectic Al-Ni-Mn alloy, and determination of mechanical and thermoelectrical properties

EFFECT OF HEAT TREATMENT ON CORROSION RESISTANCE OF Al-Ni-Mn EUTECTIC ALLOY IN 3.5% NaCl SOLUTION

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