| 1. |
- Pan, Shiwei, et al.
(författare)
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In-Situ Nanoparticles : A New Strengthening Method for Metallic Structural Material
- 2018
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Ingår i: Applied Sciences. - : MDPI. - 2076-3417. ; 8:12
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Forskningsöversikt (refereegranskat)abstract
- Over the past several years, coherent interface strengthening was proposed and has since drawn much attention. Unfortunately, many fabrication techniques are restricted to very small size. Recently, a brand new method of in-situ nanoparticle strengthening was systematically investigated, which was proved to be an efficacious way to optimize microstructure and improve mechanical property by utilizing uniformly dispersed nanoparticles. In this review, we summarized recent related advances in investigated steels and Cu alloys, including details of preparation technique and characterization of in-situ nanoparticles. In-situ nanoparticles formed in the melt possess a coherent/semi-coherent relationship with the matrix, which has a similar effect of coherent interface strengthening. In this case, bulk metallic structural materials with dispersed nanoparticles in the matrix can be fabricated through conventional casting process. The effects of in-situ nanoparticles on grain refinement, inhibiting segregation, optimizing inclusions and strengthening are also deeply discussed, which is beneficial for obtaining comprehensive mechanical response. Consequently, it is expected that in-situ nanoparticle strengthening method will become a potential future direction in industrial mass production.
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| 2. |
- Yao, Fanjin, et al.
(författare)
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Fabrication, microstructure, and thermal conductivity of multilayered Cu mesh/AZ31 Mg foil composites
- 2021
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Ingår i: Journal of Materials Research and Technology. - : Elsevier BV. - 2238-7854. ; 14, s. 1539-1550
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Tidskriftsartikel (refereegranskat)abstract
- In this study, multilayered Cu mesh/AZ31 Mg foil composites were designed and fabricated by diffusion bonding in a closed graphite mold at 400–445 °C. The effects of temperature on the microstructure of the joints formed and the thermal conductivity of the composite was evaluated. The mechanism responsible for the observed improvement in thermal conductivity was analyzed. After diffusion bonding, the thermal conductivity of the multilayered composite was as high as 122.3 W/m·K at room temperature (25 °C), which is 109.4% higher than that of the AZ31 Mg alloy (58.4 W/m·K) fabricated using the same process. Moreover, the fabricated Mg matrix composites had a maximum density of 2.21 g/cm3, indicating that they were lightweight. A continuous film-like structure composed of intermetallic compounds and α-Mg region with good contribution to heat conduction has been found, which has a reference for the design and fabrication of high-thermal-conductivity Mg matrix composites.
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