Influence of particle size and spatial distribution of B4C reinforcement on the microstructure and mechanical behavior of precipitation strengthened Al alloy matrix composites

Wu, Chuandong; Ma, Kun; Wu, Jialu; Fang, Pan; Luo, Guoqiang; Fei, Chen; Shen, Qiang; Zhang, Lianmeng; Schoenung, Julie M.; Lavernia, Enrique J.

doi:10.1016/j.msea.2016.08.062

Cited by 100 publications

(31 citation statements)

References 45 publications

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“…As evident in Fig. 1 , the B 4 C particles have an angular morphology characterized by straight and well defined interfaces with the matrix; this is consistent with the characteristics of the as-received B 4 C particles as reported in our previous research 33 . Details on the distribution and characteristics of the various precipitates in different regions (the matrix and MPZ) are described in this section.…”

Section: Resultssupporting

confidence: 91%

“…The sintering pressure applied was 20 MPa. Additional details related to the PAS experiments can be found in the literature 31 , 33 . Sequential heat treatments were performed at 466 °C for 2 h followed by a temperature increase up to 480 °C in 1 h, then quenched in water at room temperature and artificially aged at temperature of 120 °C for 24 hours 31 .…”

Section: Methodsmentioning

confidence: 99%

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Precipitation phenomena in Al-Zn-Mg alloy matrix composites reinforced with B4C particles

Zhang

et al. 2017

Sci Rep

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To provide insight into precipitation phenomena in age-hardening Al-Zn-Mg(-Cu) matrix composites, an Al 7075 alloy composite reinforced with B4C particles was selected as a model system. The bulk composites were fabricated via plasma activated sintering and followed by a peak aged (T6) heat treatment. Two types of Al matrix zones were identified in the composite: (1) the regions in the vicinity of the matrix/reinforcement interface, defined as “matrix plastic zone” (MPZ) hereafter, and (2) the regions away from the matrix/reinforcement interface, simply defined as matrix hereafter. The precipitation behavior in the MPZ was characterized and compared to that in the matrix. The MPZ contained a high density of dislocations. The number density of GP zones in the MPZ is lower than that in the matrix while the average size of the GP zones in MPZ is coarser. In addition, semi-coherent platelet η′ precipitates were observed but only in the MPZ. The dislocations and the Al/B4C interfaces provide more heterogeneous nucleation sites for the η′ precipitates in the MPZ. The growth and coarsening of the η′ precipitates caused rapid depletion of Mg and Zn solute atoms in the MPZ.

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Section: Resultssupporting

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Precipitation phenomena in Al-Zn-Mg alloy matrix composites reinforced with B4C particles

Zhang

et al. 2017

Sci Rep

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“…The parameter ∆σ d is the strength increment due to the CTE mismatch between the matrix and the reinforcement upon cooling. Considering the dislocation enhancement discussed above, the dislocation strengthening model is given by Equation (5) [34]:…”

Section: Resultsmentioning

confidence: 99%

Design and Synthesis of C-O Grain Boundary Strengthening of Al Composites

Zhang

Luo

et al. 2020

Nanomaterials

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This research presents an approach for C-O grain boundary strengthening of Al composites that used an in situ method to synthesize a C-O shell on Al powder particles in a vertical tube furnace. The C-O reinforced Al matrix composites (C-O/Al composites) were fabricated by a new powder metallurgy (PM) method associated with the hot pressing technique. The data indicates that Al4C3 was distributed within the Al matrix and an O-Al solution was distributed in the grain boundaries in the strengthened structure. The formation mechanism of this structure was explained by a combination of TEM observations and molecular dynamic simulation results. The yield strength and ultimate tensile strength of the C-O/Al composites, modified by 3 wt.% polyvinyl butyral, reached 232.2 MPa and 304.82 MPa, respectively; compared to the yield strength and ultimate tensile strength of the pure aluminum processed under the same conditions, there was an increase of 124% and 99.3%, respectively. These results indicate the excellent properties of the C-O/Al-strengthened structure. In addition, the strengthening mechanism was explained by the Hall–Petch strengthening, dislocation strengthening, and solid solution strengthening mechanisms, which represented contributions of nearly 44.9%, 15.9%, and 16.6% to the total increased strength, respectively. The remaining increment was attributed to the coupled strengthening of the C and O, which contributed 20.6% to the total increase.

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“…The dominant wear for AA5083 was adhesion while the composite was abrasive. Effect of reinforcement particle size on the microstructure evolution and mechanical behavior of AA7075/B4C composites studied by Wu et al [29]. Composites produced by plasma-activated Sintering using three sizes of B4C particles; 56.9 μm, 4.2 μm and 2.0 μm.…”

Section: Effect Of B4c Reinforcement In Mono Amcsmentioning

confidence: 99%

Boron Carbide (B4C) Reinforced Aluminum Matrix Composites (AMCs)

Sharma¹,

Sharma²,

Upadhyay³

2019

IJITEE

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Aluminum matrix composites (AMCs) demonstrating a good combination of properties that are hard to acquire by a monolithic aluminum material. Since the last few decades, investigators have shown their keen interest to advance these materials for complex applications. Homogeneous reinforcement distribution, defect-free microstructure, and improved resultant properties depends on the fabrication method along with matrix and reinforcement materials and size. Two-step melt stirring technique and K2TiF6 flux enhanced the wettability and improve the particle distribution of boron carbide (B4C) in AMCs. The mechanical properties of the AMCs were enriched by either extrusion process or thermal treatment. Hybrid composites exhibited better characteristics than mono composites. Surface composites manufactured by incorporation of reinforcement in the surface layer; offer good surface properties without losing toughness and ductility. The B4C-Al interfacial reactions produce different precipitates in AMCs and damaged the composite's age-hardening ability. B4C reinforced friction stir processed surface composites exhibits refined structure and better properties compared to the aluminum matrix. The strength, hardness, and wear resistance of AMCs increased with rising fraction and reducing the size of B4C up to a certain level. Wear rate increases with rising applied load, sliding time and speed. A review of effect of B4C reinforcement on different properties of mono and hybrid AMCs with summarized results attained and concluded by different investigators is presented in this paper to help researchers in the field. At the end of this paper a position given to conclusions and future directions.

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Influence of particle size and spatial distribution of B4C reinforcement on the microstructure and mechanical behavior of precipitation strengthened Al alloy matrix composites

Cited by 100 publications

References 45 publications

Precipitation phenomena in Al-Zn-Mg alloy matrix composites reinforced with B4C particles

Precipitation phenomena in Al-Zn-Mg alloy matrix composites reinforced with B4C particles

Design and Synthesis of C-O Grain Boundary Strengthening of Al Composites

Boron Carbide (B4C) Reinforced Aluminum Matrix Composites (AMCs)

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