Microstructure and fracture characteristic of Mg–Al–Zn–Si3N4 composites

Wang, S.R.; Geng, Haoran; Wang, Y.Z.; Zhang, J.C.

doi:10.1016/j.tafmec.2006.05.005

Cited by 18 publications

(6 citation statements)

References 20 publications

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“…The error between the SIF values as obtained experimentally and by FEM method is maximum at 5 wt.% SiC for 3 mm crack length. Wang et al 37 discussed the effect of volume fraction of reinforcement on fracture toughness and found that when the volume fraction was <6%, the composite had improved fracture toughness but with the increasing volume fraction of reinforcement (>6%), the fracture toughness decreased slowly at the initial stages and then decreased rapidly towards the end.…”

Section: Effect Of Sic Content On Impact Strength Of A356 Alloy Compositesmentioning

confidence: 99%

Experimental and finite element analysis of mechanical and fracture behavior of SiC particulate filled A356 alloy composites: Part I

Kukshal

Gangwar

Patnaik

2013

Proceedings of the Institution of Mechanical Engineers, Part L:

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In the present study, silicon carbide (SiC) filled cast aluminum (A356) alloy composites were fabricated using stir casting technique by varying SiC weight percentages from 0 wt.% to 25 wt.% at a range of 5 wt.%, respectively. The spherical shaped SiC particles of 60 mm size were uniformly mixed with the semi-solid alloy by mechanical stirrer. The physical and mechanical properties along with the fracture toughness of SiC filled A356 alloy composite were evaluated experimentally and compared with finite element analysis results for the validation purpose. It was found that the void content of A356 alloy composites varied from 1.01% to 2.69% and hardness from 21.25 HRB to 33 HRB with the increased SiC wt.% from 0% to 25%. The maximum experimental value of Young's modulus and flexural strength at 25 wt.% SiC filled A356 alloy composite was found to be 150.55 MPa and 315.94 MPa, respectively. Impact energy of the SiC filled A356 alloy composite also increased from 3.92 J at 0 wt.% to 7.82 J at 25 wt.% SiC. It was established that the stress intensity factor for unfilled and SiC filled A356 alloy composites increases with the increased crack length for 0-25 wt.% SiC content. The tensile and flexural behavior of the composite is simulated by three-dimensional (3D) unit cell model using appropriate boundary condition in ANSYS. Finally, stress intensity factor for the crack propagation is determined using 2D simulation of single side edge cracked specimen in compact tension. The maximum percentage error for tensile strength and fracture toughness as calculated experimentally and by finite element method was found to be 5.74% and 7.69%, respectively, which is within the acceptable range.

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Section: Effect Of Sic Content On Impact Strength Of A356 Alloy Compositesmentioning

confidence: 99%

Experimental and finite element analysis of mechanical and fracture behavior of SiC particulate filled A356 alloy composites: Part I

Kukshal

Gangwar

Patnaik

2013

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Designers are changing over to ceramic reinforced materials for improvement in wear resistance, corrosion resistance and high thermal strength [7,8]. The wear resistance of Al7075/SiC, Al6061/Al 2 O 3 and Al7075 matrix MMCs was increased with the increase in filler content [9]. In the similar work, the mechanical and wear properties of the stir cast alumina particulate reinforced AlSi18CuNi alloy composite were greatly improved [10].…”

Section: Introductionmentioning

confidence: 90%

Comparative analysis of wear behavior of garnet and fly ash reinforced Al7075 hybrid composite

Mishra

Patnaik

Kumar

2019

Materialwissenschaft Werkst

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Al7075 hybrid composites reinforced with varying weight percentage (0 wt.%, 5 wt.%, 10 wt.%, 15 wt.%) of each of garnet and fly ash were fabricated and characterized for their comparative wear assessment. The sliding wear test was conducted on a reciprocating tribometer in dry medium under the working conditions of applied normal load (2 N, 4 N, 6 N, 8 N), sliding velocities (0.04 m/s, 0.08 m/s, 0.12 m/s, 0.16 m/s), sliding distance (20 m, 40 m, 60 m, 80 m) and working temperature (25 °C, 50 °C, 75 °C, 100 °C). The experiments were performed as per steady‐state condition and Taguchi (L25) orthogonal array design to evaluate specific wear rate of the Al7075 hybrid composites. The finding of results indicated that the wear rate was decreased with the increase in the filler content in both the case of garnet and fly ash reinforced Al7075 hybrid composites. The results from Taguchi experiments suggested that the filler content and load were the most significant factors affecting wear behavior of composites while temperature and sliding distance are the least significant factors. Also, the garnet reinforced Al7075 hybrid composite indicated less specific wear rate as compared to that of fly ash reinforced Al7075 hybrid composite.

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“…Silicon nitride is a potential candidate as a reinforcement for the manufacture of light composite materials by mixing it with magnesium alloys [3,4]. However, it has been shown that there is not a good a nity between silicon nitride and magnesium showing low wettability and promoting the formation of fragile phases such as MgAl 2 O 4 when magnesium interacts with the nitrogen in the system [5,6]. Few related systems have been achieved based on the use of techniques such as stir casting leading to magnesium matrix composite materials with low reinforcement content, in addition to exhaustive mixing control and the possibility of poor reinforcement distribution [7].…”

Section: Introductionmentioning

confidence: 99%

Kinetics Evaluation of Passive Oxidation at High Temperature of Silicon Nitride Used in the Fabrication of Lightweight Metal Matrix Composites

López-López

Contreras

Morales-Estrella

et al. 2022

Silicon

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In the present work, the passive oxidation kinetics of silicon nitride α-Si 3 N 4 and (α+β)-Si 3 N 4 powders at different temperatures from 1000 to 1200 °C were evaluated. Oxidation of these powders was carried out to improve wettability and pressureless in ltration of AZ91E Mg-alloy. The oxidation kinetic constant (k p ) values and oxide layer depth were calculated. The oxidation kinetic constants k p , were 9.11e -16 and 6.35e -16 kg 2 /m 4 s and the oxidation depth were 4.25 nm and 3.69 nm, for α-Si 3 N 4 and (α+β)-Si 3 N 4 , respectively. Furthermore, passive surface oxidation of silicon nitride was performed in order to achieve a nity between silicon nitride and AZ91E magnesium alloy. Therefore, the manufacture of AZ91E/Si 3 N 4 magnesium matrix composite materials was successfully achieved by spontaneous in ltration process at a temperature of 800 °C. HighlightsChanges in passive oxidation kinetics of silicon nitride were identify by the β-Si 3 N 4 presence in the Si 3 N 4 powders.The SiO 2 amorphous coating produced by passive oxidation on the silicon nitride surface reduce the contact angle between Si 3 N 4 and AZ91E magnesium alloy.Passive oxidation of silicon nitride improves the wettability between Si 3 N 4 and AZ91E magnesium alloy.

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Microstructure and fracture characteristic of Mg–Al–Zn–Si3N4 composites

Cited by 18 publications

References 20 publications

Experimental and finite element analysis of mechanical and fracture behavior of SiC particulate filled A356 alloy composites: Part I

Experimental and finite element analysis of mechanical and fracture behavior of SiC particulate filled A356 alloy composites: Part I

Comparative analysis of wear behavior of garnet and fly ash reinforced Al7075 hybrid composite

Kinetics Evaluation of Passive Oxidation at High Temperature of Silicon Nitride Used in the Fabrication of Lightweight Metal Matrix Composites

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