Yunhuan Nie

Achieving superior mechanical property and large adjustability in a metalloid-free FeCrNi alloy

Zhicheng Miao, Dongmei Zhang, Beibei Jiang, Zhaowen Huang et autres

Advanced structural alloys with high performance and large property adjustability are desired for engineering applications. However, traditional multi-micro-alloying metallurgy depends on the specific manufacturing technique, leading to the narrow processing window, poor welding ability and structural stability. In this proof-of-concept study, a …

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Mechanisms of superior mechanical property and large adjustability in FeCrNi alloy without metalloid alloying

Zhicheng Miao, Dongmei Zhang, Beibei Jiang, Zhaowen Huang et autres

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Low-frequency non-phononic vibrations of amorphous solids

Lijin Wang, Ding Xu, Shiyun Zhang, Yunhuan Nie et autres

The inherent disorder imparts amorphous solids with a range of anomalous yet universally observed mechanical and thermodynamic properties at low temperatures, which distinguish them from their crystalline counterparts. A comprehensive understanding of these low-temperature anomalies is imperative from all perspectives but still …

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Unifying dynamics of glass-forming liquids by crystallization temperature

Yunhuan Nie, Lijin Wang, Huiming Cao, Pengfei Guan et autres

A crucial question pertaining to the understanding of the elusive glass transition concerns the existence of a universal framework that can describe the dynamics of various glass-forming liquids. Here, we report our achievement of a comprehensive unification of dynamics via the utilization …

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Understanding the glassy dynamics from melting temperatures in binary glass-forming liquids

Yunhuan Nie, Lijin Wang, Pengfei Guan, Ning Xu

It is natural to expect that small particles in binary mixtures move faster than large ones. However, in binary glass-forming liquids with soft-core particle interactions, we observe the counterintuitive dynamic reversal between large and small particles along with the increase of pressure …

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Density of states below the first sound mode in 3D glasses

Lijin Wang, Licun Fu, Yunhuan Nie

Glasses feature universally low-frequency excess vibrational modes beyond Debye prediction, which could help rationalize, e.g., the glasses’ unusual temperature dependence of thermal properties compared to crystalline solids. The way the density of states of these low-frequency excess modes D(ω) depends on the …

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Unifying fluctuation-dissipation temperatures of slow-evolving nonequilibrium systems from the perspective of inherent structures

Jianhua Zhang, Wen Zheng, Shiyun Zhang, Ding Xu et autres

Effective temperatures of slow-evolving nonequilibrium systems measure characteristic temperatures of equilibrium systems.

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Signatures of continuous hexatic–liquid transition in two-dimensional melting

Jialing Guo, Yunhuan Nie, Ning Xu

Recent studies have shown that the melting of two-dimensional crystals can be either continuous or discontinuous, relying on multiple parameters such as particle stiffness, density, and particle size dispersity. However, what determines the continuity or discontinuity of the two-dimensional melting remains elusive. …

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Role of disorder in determining the vibrational properties of mass-spring networks

Yunhuan Nie, Hua Tong, Jun Liu, Mengjie Zu et autres

By introducing four fundamental types of disorders into a two-dimensional triangular lattice separately, we determine the role of each type of disorder in the vibration of the resulting mass-spring networks. We are concerned mainly with the origin of the boson peak and …

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Connecting glass-forming ability of binary mixtures of soft particles to equilibrium melting temperatures

Yunhuan Nie, Jùn Líu, Jialing Guo, Ning Xu

Abstract The glass-forming ability is an important material property for manufacturing glasses and understanding the long-standing glass transition problem. Because of the nonequilibrium nature, it is difficult to develop the theory for it. Here we report that the glass-forming ability of binary …

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