Achieving ultra-high strength in Be/Al composites by self-exhaust pressure infiltration and hot extrusion process

Kuang, Zeyang; Yang, Wenshu; Ju, Boyu; Xia, Yixiao; Wang, Zhijun; Gong, Dunwei; Fu, Linlin; Wu, Yiming; Sun, Dalin; Wu, Guanglei

doi:10.1016/j.msea.2022.144473

Cited by 12 publications

(3 citation statements)

References 42 publications

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“…The fabrication process of the composites was the same as that of the Be/Al composites reported previously by self-exhaust pressure infiltration [ 21 ]. The beryllium powder was loaded into a steel mold in a vacuum glove box, and then pressed to a specified volume fraction to make a preform.…”

Section: Methodsmentioning

confidence: 99%

“…Adding alloying elements to the aluminum matrix is an effective way to obtain a uniform and refined microstructure, while helping to improve the interfacial strength between beryllium and aluminum, such as adding Mg, Si, Ag, Ge, Ni, Sc, Zr, etc. [ 13 , 14 , 15 , 16 ] At the same time, our previous work shows that in addition to powder metallurgy, precision casting, laser melting, and other preparation methods [ 17 , 18 , 19 , 20 ], the self-exhaust pressure infiltration technique has been successfully verified as an effective method to prepare high-strength Be/Al composites with good interfacial bonding [ 21 ]. Therefore, we selected two kinds of beryllium powders with different morphologies produced by different processes as reinforcements to prepare qualified beryllium/aluminum composites by the pressure infiltration method.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Interfacial Strength on Mechanical Behavior of Be/2024Al Composites by Pressure Infiltration

et al. 2023

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In this paper, two kinds of Be/2024Al composites were prepared by the pressure infiltration method using two different beryllium powders as reinforcements and 2024Al as a matrix. The effect of interfacial strength on the mechanical behavior of Be/2024Al composites was studied. Firstly, the microstructure and mechanical properties of the two composites were characterized, and then the finite element analysis (FEA) simulation was used to further illustrate the influence of interfacial strength on the mechanical properties of the two Be/2024Al composites. The mechanical tensile test results show that the tensile strength and elongation of the beryllium/2024Al composite prepared by the blocky impact grinding beryllium powder (blocky-Be/2024Al composite) are 405 MPa and 1.58%, respectively, which is superior to that of the beryllium/2024Al composite prepared by the spherical atomization beryllium powder (spherical-Be/2024Al composite), as its strength and elongation are 331 MPa and 0.38%, respectively. Meanwhile, the fracture of the former shows brittle fracture of beryllium particles and ductile fracture of aluminum, while the latter shows interface debonding. Further FEA simulation illustrates that the interfacial strength of the blocky-Be/2024Al composite is 600 MPa, which is higher than that of the spherical-Be/2024Al composite (330 MPa). Therefore, it can be concluded that the better mechanical properties of the blocky-Be/2024Al composite contribute to its stronger beryllium/aluminum interfacial strength, and the better interfacial strength might be due to the rough surface and microcrack morphology of blocky beryllium particles. These research results provide effective experimental and simulation support for the selection of beryllium powder and the design and preparation of high-performance beryllium/aluminum composites.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Interfacial Strength on Mechanical Behavior of Be/2024Al Composites by Pressure Infiltration

et al. 2023

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“…%, while Al is virtually insoluble in Be, and the solubility between them is extremely limited. Therefore, in previous studies [4][5][6], it is considered that Be-Al alloy is a kind of composite material with discontinuous granular Be phase reinforcing Al matrix.…”

Section: Opinionmentioning

confidence: 99%