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Open AccessReview

In-Situ Nanoparticles: A New Strengthening Method for Metallic Structural Material

1
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
2
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
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Department of Materials Science and Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2018, 8(12), 2479; https://doi.org/10.3390/app8122479
Received: 29 October 2018 / Revised: 23 November 2018 / Accepted: 23 November 2018 / Published: 3 December 2018
(This article belongs to the Section Nanotechnology and Applied Nanosciences)
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. View Full-Text
Keywords: casting; strengthening method; in-situ nanoparticles; coherent interface; grain refinement; mechanical properties casting; strengthening method; in-situ nanoparticles; coherent interface; grain refinement; mechanical properties
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MDPI and ACS Style

Pan, S.; Zhou, X.; Chen, K.; Yang, M.; Cao, Y.; Chen, X.; Wang, Z. In-Situ Nanoparticles: A New Strengthening Method for Metallic Structural Material. Appl. Sci. 2018, 8, 2479.

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