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相关概念视频

Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added together...
Castigliano's Theorem01:18

Castigliano's Theorem

Castigliano's theorem analyzes displacements and rotations in elastic structures. It relates the derivative of elastic strain energy to the applied forces or moments, allowing for the calculation of deformations. The theorem states that the partial derivative of the total strain energy of a system with respect to a specific load results in the displacement at the point where the load is applied. This principle applies to both forces and moments.

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Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications
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大量Ti和Ti-6Al-4V合金的多相数据集.

Connor S Allen1, Albert P Bartók2,3

  • 1Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom.

Scientific data
|December 5, 2025
PubMed
概括

这项研究为 (Ti) 和Ti-6Al-4V合金相位行为建模提供了必要的原子配置数据库. 这些数据库具有DFT计算的属性,可以为材料科学提供准确的机器学习原子间潜力 (MLIP).

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科学领域:

  • 材料科学 材料科学 材料科学
  • 计算材料科学科学 计算材料科学
  • 物理化学 物理化学

背景情况:

  • (Ti) 和其合金是具有复杂相位行为的关键工程材料.
  • 对Ti及其合金进行精确的原子尺度建模需要广泛的原子配置数据库.
  • 机器学习原子间潜力 (MLIP) 对于大规模,现实的模拟是必不可少的,但依赖于高质量的数据.

研究的目的:

  • 为Ti和Ti-6Al-4V合金的各个阶段生成全面的原子配置数据库.
  • 为了提供密度函数理论 (DFT),计算了这些配置的总能量,力和应力值.
  • 开发和验证用于开发和评估MLIP模型的基准协议.

主要方法:

  • 使用PBE功能计算DFT计算来评估Ti和Ti-6Al-4V配置的属性.
  • 采用了使用非对角超级电池的数据减少策略,用于Ti的振动特性.
  • 开发了用于快速开发和评估MLIP模型的基准协议.

主要成果:

  • 创建了代表Ti的α,β,ω和液态相以及Ti-6Al-4V合金的数据库.
  • 包括数据库内的DFT衍生总能量,力和应力值.
  • 通过使用GAP和ACE框架调整模型来证明数据库和协议的实用性.

结论:

  • 生成的数据库和验证工具有助于为Ti和Ti-6Al-4V开发准确的MLIP.
  • 这些MLIP可以在各种热力学条件下可靠地模拟Ti及其合金的相位行为.
  • 该研究为推进合金研究中的原子模拟提供了基础.