Microstructures, tensile properties and work hardening behavior of SiCp/Mg-Zn-Ca composites

Li, Weijian; Deng, Kun-kun; Zhang, Xiao; Wang, Cuiju; Kang, Jin-wen; Nie, Kai-bo; Liang, Wei

doi:10.1016/j.jallcom.2016.11.070

Cited by 55 publications

(13 citation statements)

References 37 publications

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“…Figure 7 c shows the work hardening rate (

) versus net flow stress

of ECAPed Mg-9Al-1Si-1SiC composites without and with HT. It is clearly observed that there is no initially linear hardening behavior (stage II), only a dynamic recovery stage (stage III) and a large-strain work hardening stage (stage IV) appear in the

– (

) curves of the present alloys [ 21 , 30 , 31 ]. Generally, stage II is related to high dislocation density.…”

Section: Resultsmentioning

confidence: 98%

Microstructure and Tensile Properties of ECAPed Mg-9Al-1Si-1SiC Composites: The Influence of Initial Microstructures

Zhang

Wang

et al. 2018

Materials

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Mg-9Al-1Si-1SiC composites with various initial microstructures prior to equal channel angular pressing (ECAP) were obtained by different pre-treatments (without and with homogenization treatment), and the resultant grain size, second phase and tensile properties of ECAPed composites were reported. The ECAPed composite with homogenization treatment (HT) exhibited finer grain size, higher fraction of dynamically recrystallized (DRXed) grains, weaker texture intensity, as well as the presence of dynamic precipitated Mg17Al12 phase compared to that without HT. Besides, the morphology of pre-existing Mg2Si changed from massive-like to needle-like in the ECAPed composite with HT. Room-temperature tensile test results showed that ultimate tensile strength (UTS), yield strength (YS), and elongation (El) of ECAPed composites with HT were 16.1%, 23%, and 27.3% larger than that without HT, respectively.

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“…Figure 7 c shows the work hardening rate (

) versus net flow stress

– (

) curves of the present alloys [ 21 , 30 , 31 ]. Generally, stage II is related to high dislocation density.…”

Section: Resultsmentioning

confidence: 98%

Microstructure and Tensile Properties of ECAPed Mg-9Al-1Si-1SiC Composites: The Influence of Initial Microstructures

Zhang

Wang

et al. 2018

Materials

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“…Among the diverse methods to improve certain restrictions of Mg, such as powder metallurgy and spray deposition, synthesis of Mg-based metal matrix composites with reinforcement particles using stir casting technique is a simple and cost-effective method (Sun et al, 2017). In addition, among the ceramic reinforcements to fabricate metal matrix composites (MMCs), SiC and CNTs are more renowned due to their high hardness values, high elastic modulus, and low price, also, they do not react with Mg matrix ( Li et al, 2017;). Many investigations have been accomplished on the influence of SiC particles' integration with Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

Microstructural characterization, mechanical and tribological properties of ZC71 hybrid composite reinforced with SiC and MWCNT

Nafari

Ghandvar

Nekouee

2021

JART

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In the present study, the influences of different SiC addition, MWCNTs and various SiC particle sizes on the structural, mechanical and tribological properties of ZC71 alloys were studied. The results revealed that the proper amount/size of SiC particles with the addition of MWCNTs had a considerable effect on the microstructural alteration, and mechanical and tribological properties of the ZC71 alloy. The Vickers hardness values of the ZC71 alloy improved with the addition of MWCNT and SiC. The UTS (216 MPa) and El.% (6.95 %) were achieved in the ZC71-5%SiC(15µm)-0.5%MWCNT. The cast ZC71 alloy showed brittle fracture with some quasi-cleavage characterizations. However, by adding 5% SiC(15 µm) and 0.5% MWCNT, the fracture mode changed to ductile fracture. The wear results showed that the ZC71-5%SiC-0.5%MWCNT hybrid composite had the highest wear resistance with the lowest friction coefficient and wear rate. Examination on the worn surface of the ZC71-5%SiC-0.5%MWCNT hybrid composite showed mild abrasion as the governing wear mechanism.%2

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“…6,17,20 In the conventional Mg matrix composites, improving strength is associated with decreasing the fracture strain which can restrict their applications. 21 There are some reports about improving strength without significant reduction in fracture strain by addition of nano-sized reinforcements. [22][23][24] Carbonaceous nano reinforcement is considered as a favorable material due to its remarkably physical, chemical, anticorrosion and mechanical properties as well as interesting biocompatibility properties.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical characterizations of graphene nanoplatelets-reinforced Mg–Sr–Ca alloy as a novel composite in structural and biomedical applications

Ramezanzade

Ebrahimi

Parizi

et al. 2019

Journal of Composite Materials

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In this study, the novel composites were fabricated by the introduction of Mg-0.3Sr-0.3Ca alloy as the matrix and addition of different amounts of graphene nanoplatelets (0.1, 0.2, and 0.4 wt.%) as reinforcement using a stir casting technique followed by homogenization and extrusion in order to improve the mechanical properties of the base alloy. Optimum weight percent of adding graphene nanoplatelets was 0.2 wt.%. The addition of 0.2 wt.% graphene nanoplatelets in the extruded Mg–Sr–Ca alloy led to the grain refinement (∼36%), the decrease of anisotropy (∼14%) and the lowest twin formation. Moreover, the tensile and compressive yield strengths and tensile and compressive fracture strains of extruded Mg-0.3Sr-0.3Ca/0.2GNP composite were enhanced by 22.8%, 66.7%, 43.1% and 28%, respectively. The load transfer was significant strengthening mechanism. The uniform dispersion of graphene nanoplatelets followed by the increase of non-basal slip and grain refinement improved tensile fracture strain. In addition to maintained factors, the increase of compressive fracture strain in the extruded Mg-0.3Sr-0.3Ca/0.2GNP composite was affected by local stresses caused by twins which resulted non-basal slip and conserved basal slip due to presence of twins. Simultaneously, enhancement of the strengthening and elongation efficiencies in both tensile and compressive tests was achieved in Mg-0.3Ca-0.3Sr/0.2GNP. The biocorrosion behavior of extruded Mg-0.3Sr-0.3Ca/0.2GNP composite was promoted by 11% compared with Mg-0.3Sr-0.3Ca alloy. Comparative plots indicated that the fabricated materials can be introduced as a new class of composites for the purpose of structural as well as biomedical applications.

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Microstructures, tensile properties and work hardening behavior of SiCp/Mg-Zn-Ca composites

Cited by 55 publications

References 37 publications

Microstructure and Tensile Properties of ECAPed Mg-9Al-1Si-1SiC Composites: The Influence of Initial Microstructures

Microstructure and Tensile Properties of ECAPed Mg-9Al-1Si-1SiC Composites: The Influence of Initial Microstructures

Microstructural characterization, mechanical and tribological properties of ZC71 hybrid composite reinforced with SiC and MWCNT

Microstructure and mechanical characterizations of graphene nanoplatelets-reinforced Mg–Sr–Ca alloy as a novel composite in structural and biomedical applications

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