Effect of extrusion ratio on the wear behaviour of Al–Si and Al–Mg alloys

Demirci, Halil İbrahim; Evlen, Hatice

doi:10.1016/j.jallcom.2011.08.074

Cited by 13 publications

(4 citation statements)

References 39 publications

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“…When the applied load is increased, the surface area in contact would also be increased because of this friction between two sliding surfaces would increase. Due to friction and more surface area in contact with the harder material, it will grind the softer material at higher rate [27][28][29][30]. In this present work, it has been reported that the wear rate is increased with increasing load and decreased with the increasing Mg content in the alloy.…”

Section: Figmentioning

confidence: 53%

FABRICATION OF CAST ALUMINIUM-SILICON (Al-Si) AND ALUMINIUM-MAGNESIUM (Al-Mg) ALLOYS AND THEIR PROPERTIES

Akkera¹,

Reddy²,

Poloju³

et al. 2016

Acta Metall Slovaca

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In the present investigation, three distinct aluminium-silicon (Al-Si) containing 7 wt.%, 12 wt.%, 14 wt.% of silicon and two different aluminium-magnesium (Al-Mg) alloys containing 2.5 wt.%, 4.5 wt.% of magnesium were prepared by casting route method. The prepared Al-Si and Al-Mg alloys have homogeneous distribution of the second rich phase throughout the cast. The microstructural analysis was done by using both optical and scanning electron microscope. Hardness values were measured with a Vickers hardness tester and tensile properties were determined by using Instron universal testing machine. Further, the wear properties were studied by using a ball-on-plate wear tester. The obtaining results highlight the hardness, tensile properties and wear resistance are increases with increasing percentage of second rich phase in aluminium. The worn surfaces of these alloys revealed that the surfaces have cracks, grooves, scoring marks and debris.

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Section: Figmentioning

confidence: 53%

FABRICATION OF CAST ALUMINIUM-SILICON (Al-Si) AND ALUMINIUM-MAGNESIUM (Al-Mg) ALLOYS AND THEIR PROPERTIES

Akkera¹,

Reddy²,

Poloju³

et al. 2016

Acta Metall Slovaca

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“…Using dry sliding tests, Srinivasan et al [6] evaluated the wear behaviors of AZ31B alloy and nano-composite, which were manufactured by hybrid casting process and hot extruded at 350℃, at room temperature using the standard pin-on-disc wear test equipment Wear behaviors of hot extruded Al-Si and Al-Mg alloys under dry conditions, and ZE41A magnesium alloy have been studied by Demirci et al. [8] and Anbuselvan et al [9] . Magnesium alloys with high strength and toughness have been obtained by Segal et al [10] and Matsuyama et al [11] and using equal channel angular extrusion (ECAE) which usually includes more than 2 steps.…”

mentioning

confidence: 99%

Wear behaviors and wear mechanisms of wrought magnesium alloy AZ31 fabricated by extrusion-shear

Sun

et al. 2017

Engineering Failure Analysis

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Extrusion-Shear (ES) process for magnesium alloy is a newly developed plastic deformation technique which combines direct extrusion (DE) with ECAP(equal-channel angular pressing). Grains of ES-processed magnesium alloys can be refined effectively and mechanical properties can be improved, but the tribological properties have not been studied. In this study, the wear behaviors and wear mechanisms of AZ31 magnesium alloy samples produced by direct extrusion (DE) and extrusion-shear (ES) technologies, respectively, have been evaluated by fiction coefficient and wear frequencies obtained from the dry sliding tests conducted at different loads and frequencies by using a high speed dry sliding test machine. SEM and EDS analyses technologies also have been used to analyze the wear surfaces and wear debris in different fiction conditions. Based on the results, the ES-processed samples show a better wear resistance than those prepared by DE process as the ES-process samples show a lower friction coefficient comparing to those fabricated by DE process at the same conditions of loads and wear frequencies. With the increase of normal loads and reciprocating frequencies, the wear mechanism change from mild wear (adhesion, abrasion and oxidation) to severe wear (delamination, plastic deformation and melting). Therefore, the extrusion ways have significant influences on the wear behaviors of the samples and that the wear resistance of AZ31 magnesium alloy can be improved by extrusion-shear.

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“…Large extrusion ratio means higher extrusion pressures and more inhomogeneous material ow, which are two major causes of extrudate surface or internal defects and die damages [20,21]. Nevertheless, large extrusion ratio also has some advantages such as re ning dynamic recrystallization (DRX) grains [22], enhancing mechanical properties [23,24], and increasing wear resistance [25]. Furthermore, according to reports [26,27], the secondary extrusion process can also improve mechanical properties of materials and form some new texture components.…”

Section: Introductionmentioning

confidence: 99%

Micro-extrusion process and microstructure evolution of miniature heat pipe in 6063 aluminum alloy

Liu

Zhang

et al. 2022

Int J Adv Manuf Technol

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Micro-extrusion process of miniature heat pipe with axial micro grooves is particularly di cult due to ultra-large extrusion ratio and complex cross-sectional shape. In this study, the shape control of a miniature heat pipe in 6063 aluminum alloy with boundary dimension of 5×4 mm has been successfully realized during micro-extrusion. Micro-extrusion process and microstructure evolution of the miniature heat pipe were investigated by the combination of nite element (FE) analysis with experiments. The results show that material ow deformation behavior during micro-extrusion is highly affected by size effect, and lower ram speed is conductive to forming integrity, dimension accuracy and surface quality of the heat pipe pro le. The primary mechanism for micro-extrusion failure of micro-grooves is severely more uneven material ow between the micro rib and base region at higher ram speed, which is caused by size effect and results in shear deformation and even fractures of micro rib. Further research shows that, compared to the extrusion using as-cast billets, much coarser grains were obtained after microextrusion using as-extruded billets at an ultra-large extrusion ratio of 205. Besides that, the entirely different texture components after extrusion were obtained instead of the typical < 100 > //ED or < 111 > //ED ber texture components. These atypical texture components can be regarded as texture deviating from ideal texture by a certain angle (15° or 20°) along φ axis or φ 1 axis. from ideal texture by a certain angle (15° or 20°) along φ axis or φ 1 axis.

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Effect of extrusion ratio on the wear behaviour of Al–Si and Al–Mg alloys

Cited by 13 publications

References 39 publications

FABRICATION OF CAST ALUMINIUM-SILICON (Al-Si) AND ALUMINIUM-MAGNESIUM (Al-Mg) ALLOYS AND THEIR PROPERTIES

FABRICATION OF CAST ALUMINIUM-SILICON (Al-Si) AND ALUMINIUM-MAGNESIUM (Al-Mg) ALLOYS AND THEIR PROPERTIES

Wear behaviors and wear mechanisms of wrought magnesium alloy AZ31 fabricated by extrusion-shear

Micro-extrusion process and microstructure evolution of miniature heat pipe in 6063 aluminum alloy

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