Microstructure and enhanced mechanical properties of ZrC/Zr composites added by in-situ Y2O3 reinforced particles

Zhang, Xinjiang; Chen, Ziqing; Liu, Zhaohui; He, Min; Yang, Zhiliang; Wang, Jiahui

doi:10.1016/j.vacuum.2022.111277

Cited by 3 publications

(1 citation statement)

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“…This kind of micron and submicron second phase particles always reduce the ductility in the meantime. The deterioration of ductility by high concentration of ceramic-type strengthening particles is particularly obvious [17][18][19][20][21][22][23][24]. According to the Orowan-Ashb model, the refinement of the second phase is conducive to the simultaneous improvement of the strength and ductility of materials [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

In-Situ Fabrication, Microstructure and Mechanical Performance of Nano Iron-Rich Precipitate Reinforced Cu and Cu Alloys

Chen

et al. 2022

Metals

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In this paper, the research progress on the strengthening of copper and copper alloy is reviewed. The research shows that traditional strengthening methods are often accompanied by the decrease of plasticity, and there are limitations in size, cost, and other aspects in the process. The in-situ nanoparticle strengthening and plasticizing technology proposed in recent years can avoid the above problems. In this paper, the idea of in-situ nanoparticle strengthening is introduced to realize the simultaneous enhancement of strength and ductility of as-cast pure copper and tin bronze alloys. The effects of in-situ precipitation of iron-rich nanoparticles on the microstructure, and mechanical properties of different copper alloy systems, are systematically elucidated based on the former characterization and mechanical testing results. The results show that the in-situ introduction of iron-rich nanoparticles in the copper systems induces the formation of a nano precipitate-fine grain (NPFG) structure, which greatly improves the strength and ductility of copper alloys. The evolution of size, distribution, number density, morphology evolution in iron-rich nanoparticles, and the formation mechanism of NPFG structure, as well as the mechanism of NPFG strengthening and toughening, are summarized. An industrial-applicable casting process is proposed to prepare bulk NPFG structured copper alloys with complex shape, high strength, and high ductility.

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