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Efects of Rare Earth on Austenite–Ferrite Phase Transformation in a Low‑Carbon Fe–C Alloy

Acta Metallurgica Sinica(English Letters) 2023年第1期36卷 141-146页

作者： Fei Guo Cheng‑Wu Zheng Pei Wang Dian‑Zhong Li Yi‑Y Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

The infuence of rare earth(RE)elements on austenite–ferrite phase transformation in Fe–0.14%C alloy has been investigated by in situ observing the nucleation,growth and morphology of ferrite using high temperature laser scanning confocal microscopy,and controlled atmosphere decarburization *** is found that under the low-oxygen condition in steel,trace RE addition can signifcantly infuence the nucleation,morphology and growth of ferrite in Fe–0.14%C alloy by the combined efects of RE slowing down the carbon difusion and decreasing grain boundary energy by segregating at grain *** research provides evidences of adjusting the phase transformation and improving the mechanical properties of steels by RE addition.

关键词： Steels difusion Austenite-ferrite transformation Kinetics Rare earth

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The β-relaxation in metallic glasses

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National Science Review 2014年第3期1卷 429-461页

作者： Hai Bin Yu Wei Hua Wang Hai Yang Bai Konrad Samwer I. Physikalisches Institut Universit?t G?ttingen Institute of Physics Chinese Academy of Sciences

Focusing on metallic glasses as model systems, we review the features and mechanisms of the β-relaxations,which are intrinsic and universal to supercooled liquids and glasses, and demonstrate their importance in understanding many crucial unresolved issues in glassy physics and materials science, including glass transition phenomena, mechanical properties, shear-banding dynamics and deformation mechanisms,difusion and the breakdown of the Stokes–Einstein relation as well as crystallization and stability of *** illustrate that it is an atractive prospect to incorporate these insights into the design of new glassy materials with extraordinary properties. We also outline important questions regarding the nature ofβ-relaxations and highlight some emerging research directions in this still-evolving ield.

关键词： metallic glass β-relaxation glass transition shear transformation zone shear band difusion stability ultrastable glass

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