Sliding Wear Characteristics of AZ91D Alloy at Ambient Temperatures of 25–200 °C

Wang, S. Q.; Yang, Zebin; Zhao, Yutao; Wei, M. X.

doi:10.1007/s11249-009-9569-5

Cited by 63 publications

(14 citation statements)

References 11 publications

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“…More recently, the mild sliding wear of non-ferrous alloys, such as Al [14][15][16], Ti [17,18], Cu [19,20] and Mg alloys [21,22], has also been investigated. A comprehensive study on the mild wear of an Al alloy (a wrought 6061 Al alloy) was conducted by Zhang and Alpas [14].…”

Section: Introductionmentioning

confidence: 99%

Mild Sliding Wear of Fe–0.2%C, Ti–6%Al–4%V and Al-7072: A Comparative Study

Straffelini

Molinari

2010

Tribol Lett

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The mild sliding wear of Fe-0.2%C, Ti-6%Al-4%V and Al-7072 was investigated by means of pin-ondisc sliding tests. The applied pressure was 1 MPa and the sliding velocity was varied between 0.2 and 1 m/s. The sliding behaviour was followed by continuous measurements of the friction coefficient, pin wear and pin temperature. For the Fe alloy, wear was mixed (delamination and oxidation), and friction and wear coefficients were found to decrease with sliding velocity. The Al and Ti alloys displayed a different behaviour, characterised by the occurrence of sliding distance transitions at 0.8 and 1 m/s for the Al alloy, and at 0.4 up to 1 m/s for the Ti alloy. Before the transition, the wear coefficient of the Al alloy was very low, because of the presence of a compacted tribolayer on the sliding surface. After the transition wear was by delamination: the wear rate increased but the friction coefficient decreased. For the Ti alloy, wear occurred by oxidation and was quite high before the transition. After the transition, both the wear rate and the friction coefficient decreased, although the wear process became unstable with repeated oscillations in the friction coefficient. The results allowed us to highlight the role of flash temperature in determining the wear mechanisms of the alloys under study and the necessity of properly considering the sliding distance transitions to make reliable comparisons and obtain guidelines for safe operations.

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Section: Introductionmentioning

confidence: 99%

Mild Sliding Wear of Fe–0.2%C, Ti–6%Al–4%V and Al-7072: A Comparative Study

Straffelini

Molinari

2010

Tribol Lett

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“…The main problems affecting these materials are represented by the low corrosion resistance, caused by the high chemical reactivity of magnesium [9,10], and low wear resistance [11,12,13]. In particular, sliding motion has been proved to be a serious problem for magnesium alloys [14]. Furthermore, the chemical reactivity represents a limit also for the realization of treatment aimed at the improvement of its features.…”

Section: Introductionmentioning

confidence: 99%

Heat Treatment of AZ91 Magnesium Alloy Coated with an Al2O3 Thin Film with Fluidized Bed Technology

2019

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Fluidized bed technology is a methodology widely known in the manufacturing environment for surface treatment of metals. Within the field of surface coating, it has already been exploited for the coating of a magnesium alloy creating a compact layer of Al2O3. The result was an improvement in mechanical and tribological properties, along with improved corrosion resistance. In this context, the work proposed is addressed towards the evaluation of the effects of thermal post-treatment on the alumina coating produced by means of the fluidized-bed technology. To analyse the effects of heat treatments the morphology, composition and hardness of the samples were investigated along with adhesion and wear resistance of the alumina film. The results obtained show how the temperature affects the surface morphology and promotes the diffusion of magnesium towards the alumina superficial layer. The mechanisms triggered by heat treatments increase the adhesion of the surface film obtained in the deposition process, improving its mechanical and tribological properties.

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“…It should be pointed out that the superior elevated-temperature mechanical properties make Mg97Zn1Y2 alloy have potential in elevated-temperature tribological applications. Even though there have been a few investigations into the elevated-temperature wear behavior of magnesium alloys including AZ91D, AZ91 + 3 wt.% RE alloys and Mg/SiC composites [ 17 , 18 , 19 , 20 ], the elevated-temperature wear mechanisms and mild–severe wear transition mechanism for magnesium alloys have not yet been well clarified, especially for those magnesium alloys with high thermal stability. So far the elevated-temperature wear behavior of Mg97Zn1Y2 alloy has not been investigated systematically, mainly because the wear process at elevated temperatures is very complicated.…”

Section: Introductionmentioning

confidence: 99%

Dry Sliding Wear Behavior and Mild–Severe Wear Transition of Mg97Zn1Y2 Alloy at Elevated Temperatures

2018

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Dry sliding wear behavior of Mg97Zn1Y2 alloy was investigated at test temperatures of 50–200 °C under three sliding speeds of 0.8 m/s, 3.0 m/s and 4.0 m/s. The wear mechanisms in mild and severe wear regimes were identified by examination of morphologies and compositions of worn surfaces using scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDS), and from which wear transition maps under different sliding speeds were constructed on rectangular coordinate systems with applied load versus test temperature axes. It is found that under each sliding speed condition, mild–severe transition load decreases almost linearly within the test temperature range of 50 °C to 200 °C. Microstructure observation and hardness measurement in subsurfaces identify that the softening effect generating form dynamic crystallization (DRX) is the dominant mechanism for the mild–severe wear transition at elevated temperatures. The mild–severe wear transition at 50–200 °C follows the contact surface DRX temperature criterion, and the transition loads can be well evaluated using the criterion.

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Sliding Wear Characteristics of AZ91D Alloy at Ambient Temperatures of 25–200 °C

Cited by 63 publications

References 11 publications

Mild Sliding Wear of Fe–0.2%C, Ti–6%Al–4%V and Al-7072: A Comparative Study

Mild Sliding Wear of Fe–0.2%C, Ti–6%Al–4%V and Al-7072: A Comparative Study

Heat Treatment of AZ91 Magnesium Alloy Coated with an Al2O3 Thin Film with Fluidized Bed Technology

Dry Sliding Wear Behavior and Mild–Severe Wear Transition of Mg97Zn1Y2 Alloy at Elevated Temperatures

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