Tribological behaviour of AZ31 magnesium alloy reinforced by bimodal size B4C after precipitation hardening

Moheimani, Seyed Kiomars; Keshtgar, Azadeh; Khademzadeh, Saeed; Tayebi, Morteza; Rajaee, Ali; Saboori, Abdollah

doi:10.1016/j.jma.2021.05.016

Cited by 41 publications

(24 citation statements)

References 56 publications

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“…As can be seen, the AZ31 alloy consists of coaxial grains with an average grain size of 100 μm. The spherical coarse and discrete residual phases in the microstructure of as-cast AZ31 alloy is especially evident in the grain boundaries, which is the Mg 17 Al 12 phase, according to the previous study 1 . The Mg 17 Al 12 phase is formed during solidification due to segregation and the phase characteristic of a low melting point.…”

Section: Resultssupporting

confidence: 58%

“…CO 2 + SF 6 gas was used as a protection to prevent oxidation of the melt. The detail of sample preparation is described in 1 .…”

Section: Methodsmentioning

confidence: 99%

“…Over the recent years, magnesium alloys have received a great deal of attention in aerospace, aircraft, and automotive industries on account of lightweight 1 – 4 . Considering lower density than other alloys, namely about two-thirds that of aluminum, one-fourth that of zinc, and one-fifth that of steel, among conventional engineering alloys, magnesium alloys offer very high strength.…”

Section: Introductionmentioning

confidence: 99%

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Thermal cycles behavior and microstructure of AZ31/SiC composite prepared by stir casting

Mousavi

Sharifi

Tayebi

et al. 2022

Sci Rep

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In the present work, the effect of thermal cycles on the physical and thermal properties of AZ31 alloy and AZ31/5wt%SiC and AZ31/10wt%SiC composites was investigated. Samples were prepared using the stir casting method and then subjected to precipitation hardening. Thermal cycles were done for as-cast and aged samples with V-shaped notch under 300, 600, and 900 heating and cooling cycles at 150 and 350 °C. The crack length (CL) was evaluated using optical microscope (OM), scanning electron microscope (SEM), and energy-dispersive scanning electron (EDS) analysis. Also, density, porosity, thermal expansion coefficient of the samples were evaluated. X-ray diffraction (XRD) analysis was employed to assess the phases present in the material. The results demonstrated that by increasing the number of thermal cycles up to 600 at 150 °C and 350 °C, the porosity and density of the as-cast and aged AZ31 alloy decreased and increased, respectively; however, the density and open porosity were remained constant for the composite samples. The crack's length enlarged with increasing the thermal cycles from 300 to 600 µm at 150 °C and 300 to 900 µm at 350 °C. It was found that the reinforcement and precipitates prevented the rapid growth of the crack in the magnesium matrix. All in All, composite and the aged samples demonstrated better thermal fatigue resistance compared with that of the unreinforced alloy and as-cast samples, respectively.

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Section: Resultssupporting

confidence: 58%

“…CO 2 + SF 6 gas was used as a protection to prevent oxidation of the melt. The detail of sample preparation is described in 1 .…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal cycles behavior and microstructure of AZ31/SiC composite prepared by stir casting

Mousavi

Sharifi

Tayebi

et al. 2022

Sci Rep

Self Cite

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“…Similar trend is also reported in literature. 16,30,39 Friction behavior Effect of process parameters (load and sliding speed) on COF of AZ31 and composites are depicted in Figure 11. Fig.…”

Section: Wear Behaviormentioning

confidence: 99%

“…Similar observations are reported in literature. 16,[39][40][41][42][43][44][45] Effect of sliding distance on COF is shown in Figure 12. AZ31 alloy shows highest COF value compared to all composites.…”

Section: Wear Behaviormentioning

confidence: 99%

Dry sliding tribological behavior of ultrasonic stir cast AZ31-B₄C composites

Titarmare

Banerjee

Sahoo

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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The current study deals with the tribological characterization of AZ31-B4C composites synthesized through ultrasonic vibration associated stir casting route. B4C particles with varying weight percentage (0.5–2.0 wt. %) are reinforced in magnesium alloy to produce the composites. Optical microscope (OM), scanning electron microscope (SEM) and energy dispersive x-ray analysis (EDX) are utilized to characterize AZ31 alloy and composites so fabricated. Characterization illustrates the presence of boron carbide (B4C) and its effect on the grain refinement of composites. Micro hardness of composites is measured through Vickers's micro hardness tester. AZ31-B4C composites exhibit better hardness compared to AZ31 magnesium alloy. Micro hardness of AZ31- 2B4C composite is increased by about 49% compared to AZ31 alloy. Dry sliding tribological behavior is investigated using a pin-on-disc tribo-tester. Wear behavior of AZ31 alloy and AZ31-B4C composites is investigated under applied load of 10–40N and sliding speed of 0.1 to 0.4 m/s. The composites show better wear and friction behavior. Wear resistance of AZ31-2B4C composite is improved around 30% compared to base alloy when tested at 0.2 m/s sliding speed and 40N load. SEM and EDX analysis of worn-out surfaces reveal the wear mechanisms based on different sliding parameters. The wear morphology of pin samples reveals the presence of abrasion, oxidation, adhesion and delamination mechanism either occurring individually or in mixed mode on the pin surface.

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Microstructure and Sliding Wear Characteristics of As-Cast and SiC Reinforced ZK60 Magnesium Alloy

Abdi

Ardestani

Tamizifar

et al. 2023

JOM

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Tribological behaviour of AZ31 magnesium alloy reinforced by bimodal size B4C after precipitation hardening

Cited by 41 publications

References 56 publications

Thermal cycles behavior and microstructure of AZ31/SiC composite prepared by stir casting

Thermal cycles behavior and microstructure of AZ31/SiC composite prepared by stir casting

Dry sliding tribological behavior of ultrasonic stir cast AZ31-B₄C composites

Microstructure and Sliding Wear Characteristics of As-Cast and SiC Reinforced ZK60 Magnesium Alloy

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Tribological behaviour of AZ31 magnesium alloy reinforced by bimodal size B4C after precipitation hardening

Cited by 41 publications

References 56 publications

Thermal cycles behavior and microstructure of AZ31/SiC composite prepared by stir casting

Thermal cycles behavior and microstructure of AZ31/SiC composite prepared by stir casting

Dry sliding tribological behavior of ultrasonic stir cast AZ31-B4C composites

Microstructure and Sliding Wear Characteristics of As-Cast and SiC Reinforced ZK60 Magnesium Alloy

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Product

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Dry sliding tribological behavior of ultrasonic stir cast AZ31-B₄C composites