Towards an improved understanding of plasticity, friction and wear mechanisms in precipitate containing AZ91 Mg alloy

Kumar, Deepak; Goel, Saurav; Gosvami, Nitya Nand; Jain, Jayant

doi:10.1016/j.mtla.2020.100640

Cited by 14 publications

(4 citation statements)

References 49 publications

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“…Therefore, it shows that the wear resistance of the UFG materials obtained by SPD is better than that of coarse-grained materials, and it also shows that multidirectional forging has more obvious advantages under dry sliding wear conditions, with the ability to make alloys significantly more resistant to sliding wear. The wear mechanism can be divided into adhesive wear, oxidation wear, abrasive wear, and so on [19,20]. Adhesive wear [21] is primarily caused by the contact between two solid surfaces.…”

Section: Friction and Wear Mechanismmentioning

confidence: 99%

Effect of Multidirectional Forging and Aging Treatment on Wear Properties of ZK61 Alloy

Zhang,

Xu,

et al. 2024

Materials

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This study investigated the effects of multidirectional forging (MDF) and aging treatments on the wear properties of ZK61 magnesium alloy. Dry sliding wear tests were performed on homogenized, MDF, and aged samples using a friction wear machine to analyze the surface morphology by scanning electron microscopy (SEM) and white light interferometry, as well as the hardness and tensile mechanical properties. The ZK61 magnesium alloy has higher sliding wear properties after MDF due to higher strength, hardness, and work hardening. Grain refinement affects the wear resistance of the material, but aging increases the hardness and tensile strength and decreases the wear resistance.

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Section: Friction and Wear Mechanismmentioning

confidence: 99%

Effect of Multidirectional Forging and Aging Treatment on Wear Properties of ZK61 Alloy

Zhang,

Xu,

et al. 2024

Materials

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Section: Friction Behaviormentioning

confidence: 99%

“…Therefore, the wear mechanisms of 4P and 12P samples are similar with the homogenized sample. As the precipitates are another important influencing factor during the friction testing[65]; SEM images in BSE are shown in Figure12b,d, f and h. The precipitates distributions of the homogenized sample and 1P sample are observably changed compared to that in Figure4. The clustered precipitates were broken and scattered during the friction testing for the two samples, as shown Figure12b,d; the precipitates are no longer distributed along the grain boundaries which are dispersed with a new distribution tendency along the sliding direction.…”

mentioning

confidence: 94%

The Effect of Rotary-Die Equal-Channel Angular Pressing Process on the Microstructure, the Mechanical and Friction Properties of GW103 Alloy

et al. 2022

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In this study, the effect of rotary-die equal-channel angular pressing (RD-ECAP) on the microstructure and texture evolution of GW103 alloy is studied. RD-ECAP processes were carried out for 1, 4 and 12 passes at 450 °C. The mechanical properties and friction behavior of RD-ECAP-processed Mg-10Gd-3Y (wt%) alloy (GW103) are discussed. The results reveal that the size of dynamic recrystallized grains and second-phase particles are significantly refined to about 1.3 μm and 1 μm, respectively. The texture evolution of the processed samples is studied by X-ray diffraction and electron backscattered diffraction techniques. The multiple texture components formed are not observed after the conventional ECAP process. Moreover, different dynamic recrystallization (DRX) mechanisms are systemically analyzed and discussed in view of the texture evolution of ECAP processed samples. The final textures obtained after 12 passes are identified as two types: The C-texture type induced by continuous and discontinuous DRX, and the random texture components induced by reorientation of the initial <101¯0> fiber. Based on the grain refinement, precipitate strengthening and texture weakening mechanisms, a high-performance ternary alloy of Mg-Gd-Y was firstly obtained through 12 passes RD-ECAP processing, with a combination of high yield strength of 312 MPa and a high ductility of 22%. In addition, the friction behaviors are also studied. The multi-pass-processed samples exhibit a relatively lower friction coefficient under a load of 10 N at room temperature.

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“…The proposal of the "Hard Ball" model and the successful development of multi-body Embedded-Atom Method (EAM) [14][15][16] ake molecular dynamics become a signi cant method to study the properties of metal materials at the nanoscale level [17]. Various researchers analyzed the fretting on the surface of metal Zr and alloy AZ91, while others have studied the tribological properties of coated materials such as MoS 2 based on molecular dynamics method [18][19][20][21][22][23]. Their results show that the surface treatment can reduce wear by changing the fretting area.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Numerical and Experimental Analysis of Fretting Wear Mechanism of Variable Gauge Bogie

Yanping

2022

Preprint

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Under the "One belt, One road" strategy, the trade in goods is more frequent in diverse countries. The difference in train gauge between countries often leads to low efficiency of freight transportation. In several schemes, the variable gauge bogie can efficiently solve this problem. The fretting wear between the axles and wheels of train gauge changeable bogies may cause the connection relaxation and failure in the actual working process, resulting in potential safety hazards. Diverse experimental researches show that surface treatment technology can effectively reduce the friction and wear between axles and wheels. However, its micro wear reduction mechanism is not clear, to date. Therefore, the three-dimensional fretting wear model of bogie axle and wheel is established by molecular dynamics method in this paper. The wear reduction mechanism of surface treatment technology is then clarified from the micro point of view, and also verified by experiments. The results show that there is micro convex contact between the two surfaces under the contact stress. The micro convex is extruded and deformed, hence forming an adhesion. Whereas, the convex adhesion is desorbed by the shear force during separation, resulting in fretting wear. Since the wear reduction is caused by the reduction of transverse force, good lubrication and wear reduction effect can be achieved by MoS2 coating and nitriding. The surface treatment of MoS2 coating also reduces the friction coefficient between axles and wheels along with improving load bearing. Whereas, the friction coefficient can be decreased by increasing the nitriding amount.

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Towards an improved understanding of plasticity, friction and wear mechanisms in precipitate containing AZ91 Mg alloy

Cited by 14 publications

References 49 publications

Effect of Multidirectional Forging and Aging Treatment on Wear Properties of ZK61 Alloy

Effect of Multidirectional Forging and Aging Treatment on Wear Properties of ZK61 Alloy

The Effect of Rotary-Die Equal-Channel Angular Pressing Process on the Microstructure, the Mechanical and Friction Properties of GW103 Alloy

Molecular Dynamics Numerical and Experimental Analysis of Fretting Wear Mechanism of Variable Gauge Bogie

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