Magnesium based surface metal matrix composites by friction stir processing

Sunil, B. Ratna; Reddy, G. Pradeep Kumar; Patle, Hemendra; Dumpala, Ravikumar

doi:10.1016/j.jma.2016.02.001

Cited by 149 publications

(51 citation statements)

References 50 publications

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“…Constitutive modeling of AZ31 alloy using FE approach [22]. The modified GTN model is used to predict the strength characteristics of AZ31 alloy by varying the P-B ratio (x 1 ), temperature (x 2 ) and strain rate (x 3 ). The range of tested input parameters tested are given in Table 2.…”

Section: Constitutive Modeling Of Voids In Az31 Under Corrosionmentioning

confidence: 99%

“…These extraordinary properties make Mg alloys particularly useful for applications requiring high performance and energy savings such as structural engineering, automotive and biomedical applications [1][2][3]. It should also be noted that the weak corrosion resistance of Mg alloys restricts their applications in several novel fields [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Finite Element Based Physical Chemical Modeling of Corrosion in Magnesium Alloys

Vijayaraghavan

Garg

Gao

et al. 2017

Metals

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Magnesium alloys have found widespread applications in diverse fields such as aerospace, automotive, bio-medical and electronics industries due to its relatively high strength-to-weight ratio. However, stress corrosion cracking of these alloys severely restricts their applications in several novel technologies. Hence, it will be useful to identify the corrosion mechanics of magnesium alloys under external stresses as it can provide further insights on design of these alloys for critical applications. In the present study, the corrosion mechanics of a commonly used magnesium alloy, AZ31, is studied using finite element simulation with a modified constitutive material damage model. The data obtained from the finite element modeling were further used to formulate a mathematical model using computational intelligence algorithm. Sensitivity and parametric analysis of the derived model further corroborated the mechanical response of the alloy in line with the corrosion physics. The proposed approach is anticipated to be useful for materials engineers for optimizing the design criteria for magnesium alloys catered for high temperature applications.

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Section: Constitutive Modeling Of Voids In Az31 Under Corrosionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Finite Element Based Physical Chemical Modeling of Corrosion in Magnesium Alloys

Vijayaraghavan

Garg

Gao

et al. 2017

Metals

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“…Several techniques were adopted to produce magnesium based surface metal matrix composites (SMMCs) [3][4][5]. Friction stir processing (FSP) is one of such successful methods used for the development of surface composites [6][7][8][9][10][11][12]. FSP is a severe plastic deformation technique that allows the processing of materials within the solid state itself.…”

Section: Introductionmentioning

confidence: 99%

Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing

Patle

Sunil²,

Dumpala

2020

Mater. Res. Express

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In the present study, the surface of AZ91 Mg alloy was modified by incorporating boron carbide (B 4 C) particles using friction stir processing (FSP). Sliding wear behavior of these developed AZ91/B 4 C surface composites was investigated against AISI 52100 steel ball using linear reciprocating tribometer. Hardness tests reveal that the hardness of the fabricated surface composite (∼137.47 HV) is significantly increased compared to the base metal (∼95.5 HV) due to the presence of B 4 C particles.Wear tests were conducted on the samples at two different sliding velocities; 0.06 m s −1 and 0.12 m s −1 . It was observed that at higher sliding velocity of 0.12 m s −1 , AZ91/B 4 C surface composite exhibited lower friction coefficient value in comparison to that of the base metal, whereas it is vice versa at the low sliding velocity of 0.06 m s −1 . However, surface composites exhibited superior wear resistance at both the sliding velocities, in comparison to that of the base metal. Scanning electron microscopy and energy-dispersive spectroscopy analysis of the wear tracks were carried out to understand the wear mechanisms. From the observations, a combination of abrasive, adhesive, and oxidative wear mechanisms were found to be prominent.

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“…At the earlier stage of this soften material, the combined role of tool rotation and transverse lead made the materials to move toward the back of the tool pin from the front of the tool pin [24]. In this way, the joint is fabricated in solid-state [25]. In FSW, tool rotation speed, tool transverse speed, welding direction, applied axial force, the material of tool, and tool design/geometry are key process parameters that affect the quality of the weld joint [26].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Mechanical Behaviour Evaluation of Mg-Al-Zn Alloy Friction Stir Welded Joint

Singh¹,

Singh²,

Singh³

2020

IJAME

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The weight reduction concept is most effective to reduce the emissions of greenhouse gases from vehicles, which also improves fuel efficiency. Amongst lightweight materials, magnesium alloys are attractive to the automotive sector as a structural material. Welding feasibility of magnesium alloys acts as an influential role in its usage for lightweight prospects. Friction stir welding (FSW) is an appropriate technique as compared to other welding techniques to join magnesium alloys. Field of friction stir welding is emerging in the current scenario. The friction stir welding technique has been selected to weld AZ91 magnesium alloys in the current research work. The microstructure and mechanical characteristics of the produced FSW butt joints have been investigated. Further, the influence of post welding heat treatment (at 260 °C for 1 h) on these properties has also been examined. Post welding heat treatment (PWHT) resulted in the improvement of the grain structure of weld zones which affected the mechanical performance of the joints. After heat treatment, the tensile strength and elongation of the joint increased by 12.6 % and 31.9 % respectively. It is proven that after PWHT, the microhardness of the stir zone reduced and a comparatively smoothened microhardness profile of the FSW joint obtained. No considerable variation in the location of the tensile fracture was witnessed after PWHT. The results show that the impact toughness of the weld joints further decreases after post welding heat treatment.

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Magnesium based surface metal matrix composites by friction stir processing

Cited by 149 publications

References 50 publications

Finite Element Based Physical Chemical Modeling of Corrosion in Magnesium Alloys

Finite Element Based Physical Chemical Modeling of Corrosion in Magnesium Alloys

Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing

Microstructural and Mechanical Behaviour Evaluation of Mg-Al-Zn Alloy Friction Stir Welded Joint

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Magnesium based surface metal matrix composites by friction stir processing

Cited by 149 publications

References 50 publications

Finite Element Based Physical Chemical Modeling of Corrosion in Magnesium Alloys

Finite Element Based Physical Chemical Modeling of Corrosion in Magnesium Alloys

Sliding wear behavior of AZ91/B4C surface composites produced by friction stir processing

Microstructural and Mechanical Behaviour Evaluation of Mg-Al-Zn Alloy Friction Stir Welded Joint

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Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing