Tribological behavior of AZ91D magnesium alloy at elevated temperatures

Zafari, Ahmad; Ghasemi, H.M.; Mahmudi, R.

doi:10.1016/j.wear.2012.06.002

Cited by 81 publications

(36 citation statements)

References 24 publications

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“…It can be said that the behavior of CNTs during wear is almost similar to that of fibers. In fibers reinforced metal matrix composites, due to an increase in applied load, fibers experience fracture leading to stress concentration [25]. Therefore, according to SEM micrograph of worn surfaces (Fig.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Creep behavior and wear resistance of Al 5083 based hybrid composites reinforced with carbon nanotubes (CNTs) and boron carbide (B4C)

Alizadeh

Abdollahi

Biukani

2015

Journal of Alloys and Compounds

103

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Section: Accepted Manuscriptmentioning

confidence: 99%

Creep behavior and wear resistance of Al 5083 based hybrid composites reinforced with carbon nanotubes (CNTs) and boron carbide (B4C)

Alizadeh

Abdollahi

Biukani

2015

Journal of Alloys and Compounds

103

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“…[1][2][3][4] The factors limiting the use of Mg alloys are their low melting points, hcp structure (which inhibits the ductility and toughness), low corrosion resistance, and their cost. [1,3,5] Magnesium alloys can be mainly divided into two categories based on the presence and absence of aluminum. In the widely used aluminum-containing Mg alloys like AZ or AM series, the intermetallic phase (Mg 17 Al 12 ) has low melting point which cannot hinder the creep deformation at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…In the widely used aluminum-containing Mg alloys like AZ or AM series, the intermetallic phase (Mg 17 Al 12 ) has low melting point which cannot hinder the creep deformation at high temperatures. [1,[6][7][8][9][10][11] So the prime importance is to develop high creep resistant Mg alloys by different elemental additions (like Si, Sr, Ca, Mn, rare earth elements, or a combination of these). [2,6,7,12,13] At elevated temperature and stress, the supersaturated Mg matrix in creep resistant Mg alloys lead to the formation of precipitates (high melting point and thermally stable intermetallics like Al-Mn, Mg 2 Si, Mg 2 Sn, Mn 2 Sc, Al 2 Ca, Al 11 RE 3 , (Mg,Al) 2 Ca, Al 2 Ca, Mg-Al-Sr, Al-CeMg-Ca, Mg 12 Ce, Mg 14 Nd 2 Y, etc.)…”

Section: Introductionmentioning

confidence: 99%

A Review of Different Creep Mechanisms in Mg Alloys Based on Stress Exponent and Activation Energy

et al. 2015

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Magnesium being the lightest structural material, is being increasingly used in automotive industry but at elevated temperatures, alloys like AZ91D, AM60B, AM50A etc. exhibit poor creep resistance which hinders the powertrain applications. This article summarizes the various creep deformation mechanisms prevailing in magnesium alloys at elevated temperatures by the influence of elemental additions. The main creep mechanisms are found to be dislocation climb, diffusion creep, and grain boundary sliding. The variation of creep mechanisms for different Mg alloys with respect to the activation energy (Q), stress exponent (n) for different stresses and temperatures are reported.

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“…6(e) and (f)). This morphology is associated with thermal softening and melting of alloy caused by frictional heating at the sliding interface [29]. Nevertheless, it is worth noting that magnesium is easy to be oxidized to magnesium oxide during friction between pin and counter steel disc.…”

Section: Methodsmentioning

confidence: 99%

Dry sliding wear behavior of an extruded Mg–Dy–Zn alloy with long period stacking ordered phase

Huang

et al. 2015

Journal of Magnesium and Alloys

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The dry sliding wear behavior of extruded Mg-2Dy-0.5Zn alloy (at.%) was investigated using a pin-on-disk configuration. The friction coefficient and wear rate were measured within a load range 20e760 N at a sliding velocity of 0.785 m/s. Microstructure and wear surface of alloy were examined using scanning electron microscopy. The mechanical properties of alloy were tested at room and elevated temperatures. Five wear mechanisms, namely abrasion, oxidation, delamination, thermal softening and melting dominated the whole wear behavior with increasing applied load. The extruded Mg-2Dy-0.5Zn alloy exhibited the better wear resistance as compared with as-cast Mg 97 Zn 1 Y 2 alloy under the given conditions through contact surface temperature analysis. The improved wear resistance was mainly related to fine grain size, good thermal stability of long period stacking order (LPSO) phase and excellent higher-temperature mechanical properties.

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Tribological behavior of AZ91D magnesium alloy at elevated temperatures

Cited by 81 publications

References 24 publications

Creep behavior and wear resistance of Al 5083 based hybrid composites reinforced with carbon nanotubes (CNTs) and boron carbide (B4C)

Creep behavior and wear resistance of Al 5083 based hybrid composites reinforced with carbon nanotubes (CNTs) and boron carbide (B4C)

A Review of Different Creep Mechanisms in Mg Alloys Based on Stress Exponent and Activation Energy

Dry sliding wear behavior of an extruded Mg–Dy–Zn alloy with long period stacking ordered phase

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