Tribological Properties of Nanostructured Al/Al12(Fe,V)3Si Alloys

Ashrafi, H.; Emadi, Rahmatollah

doi:10.1007/s40195-014-0171-y

Cited by 10 publications

(4 citation statements)

References 28 publications

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“…For the IA sample (Figure a), the wear track is characterized by surface deformation in the form of longitudinal grooves parallel to the sliding direction, indicating that the surface was damaged by abrasive wear. Additionally, the wear track is covered with a dark layer in some areas (Figure b), suggesting the formation of an oxide layer on the wear track . Some microcracks and small oxide debris are present within the oxide layer which are evidences of oxidative wear.…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, the wear track is covered with a dark layer in some areas (Figure 7b), suggesting the formation of an oxide layer on the wear track. [42,43] Some microcracks and small oxide debris are present within the oxide layer which are evidences of oxidative wear. For SQ sample (Figure 7d and e), effects of both oxidation and delamination are observed on the wear track, suggesting the removal of material by oxidation and subsequent delamination of oxide layer.…”

Section: Wear Mechanismmentioning

confidence: 99%

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Influence of Heat Treatment Schedule on the Tensile Properties and Wear Behavior of Dual Phase Steels

Ashrafi

Sadeghzade

Emadi

et al. 2016

steel research int.

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The aim of present study is to investigate the influence of heat treatment schedule on the microstructure, tensile properties, and wear behavior of dual phase (DP) steels. In this regard, a cold‐rolled low carbon steel (0.18% C, 1.25% Mn) is subjected to intercritical annealing (IA), step quenching (SQ), and intermediate quenching (IQ) heat treatment cycles to produce DP steels with different microstructures. The results show that the tensile strength, strength‐elongation balance, and wear resistance of DP steels change in the order of SQ < IA < IQ. Variation of work hardening rate (θ = dσ/dϵ) with stress for the IA treated DP steel shows a one stage behavior corresponding to stage III, where θ linearly decreases with increasing flow stress. In contrast, for IQ and SQ treated specimens, a two stage behavior corresponding to an initial rapid decrease of θ with stress (transition stage) followed by stage III hardening are observed. The dominant wear mechanism for DP steels produced by IA and IQ treatments is a combination of abrasion and oxidation, while for the SQ treated specimen, a combination of oxidation and delamination is observed.

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Section: Resultsmentioning

confidence: 99%

Section: Wear Mechanismmentioning

confidence: 99%

Influence of Heat Treatment Schedule on the Tensile Properties and Wear Behavior of Dual Phase Steels

Ashrafi

Sadeghzade

Emadi

et al. 2016

steel research int.

Self Cite

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“…Therefore, local destruction and reduction of performance frequently occurs with the Al alloy during its service, which weakens the performance stability and life length significantly. The applications of 7075 Al alloy are greatly affected owing to the above shortcomings [6,7]. Based on the increasing demand for Al alloys in the above fields, it is essential to improve the tribological properties of Al alloy.…”

Section: Introductionmentioning

confidence: 99%

Research on the Improvement Effect and Mechanism of Micro-Scale Structures Treated by Laser Micro-Engraving on 7075 Al Alloy Tribological Properties

et al. 2019

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During various applications in aerospace, ships, autos, and aircraft, 7075 Al alloy will frequently contact other materials, and therefore suffer from slight abrasion. However, the poor tribological properties of 7075 Al alloy greatly affect its performance and life length, leading to limitations in its application. Preparing roughness structures on the surface is regarded as a promising method to improve the properties of materials. However, the tribological properties of 7075 Al alloy cannot be enhanced significantly by roughness structures in complex dynamic changeable environments, owing to the incomplete understanding of the effect of roughness structures. Given the above issues, in this paper, micro-scale structures (linear grooves, gridding grooves, and arc grooves) were designed and prepared on 7075 Al alloy surfaces by a surface treatment (laser micro-engraving), which provides excellent controllability of the morphology and dimensions of as-prepared roughness structures. The tribological properties of the as-prepared surfaces were investigated systemically. The effect of micro-scale structures on the tribological properties was studied. The wear mechanism and tribological properties improvement mechanism of the surfaces were clarified. Furthermore, the effect degree of the enhancement factors of the micro-scale structures on the tribological properties was explored under different conditions. The results indicate that the micro-scale structures play an important role in improving the tribological properties of Al alloy under different sliding speeds. The improvement mechanism can be summarized by four factors. However, the effect degrees of these factors on the tribological properties exhibit considerable differences. This study not only develops specific micro-scale structures that can dramatically improve the tribological properties of 7075 Al alloy under different conditions, but also offers guidance for the construction of appropriate roughness structures that can dramatically improve the tribological properties of Al alloy according to the friction conditions.

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“…Most of the research for automotive applications is based on Al [2][3][4]. Recently, Mg has attracted more attention in many industrial applications, primarily the automotive and aerospace industries, because it is about two-thirds as dense as Al [5,6].…”

Section: Introductionmentioning

confidence: 99%

In Situ Aluminum Alloy Coating on Magnesium by Hot Pressing

Yamanoğlu

2015

Acta Metall. Sin. (Engl. Lett.)

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In the present study, pure magnesium was in situ coated with pre-alloyed Al-Cu-Mg alloy through hot pressing. The produced samples were characterized by means of hardness, wear properties and microstructure characterization. A ball-on-disk test was used to determine the dry sliding wear characteristics of the compacts. The results showed that the hot pressing technique has been successfully applied for producing magnesium parts with compatible wear resistance and hardness to aluminum. The in situ coating of Al on Mg by hot pressing resulted in an increase in hardness of about 30% compared with the pure Mg substrate. The wear rate and friction coefficient of the samples decreased with Al coating and increased with an increase in the applied load during the wear tests, compared with the uncoated material.

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Tribological Properties of Nanostructured Al/Al12(Fe,V)3Si Alloys

Cited by 10 publications

References 28 publications

Influence of Heat Treatment Schedule on the Tensile Properties and Wear Behavior of Dual Phase Steels

Influence of Heat Treatment Schedule on the Tensile Properties and Wear Behavior of Dual Phase Steels

Research on the Improvement Effect and Mechanism of Micro-Scale Structures Treated by Laser Micro-Engraving on 7075 Al Alloy Tribological Properties

In Situ Aluminum Alloy Coating on Magnesium by Hot Pressing

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