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Full-Text Articles in Metallurgy
Local Dynamics And Atomic-Level Structures In Metallic Liquids And Glasses, Zengquan Wang
Local Dynamics And Atomic-Level Structures In Metallic Liquids And Glasses, Zengquan Wang
Doctoral Dissertations
Structure and dynamics at the atomic level in metallic glasses and liquids are poorly understood when compared to the crystalline solids. For instance, even though viscosity is the basic property of liquids, its atomistic origin is not well elucidated. Also, the physics of the fragility of liquids and the crossover phenomenon is far from full understanding. Earlier, through molecular dynamics (MD) simulations a direct connection was found between the timescale describing the macroscopic viscous behavior, the Maxwell relaxation time (tM = h/G∞, h is the shear viscosity and G∞ is the high-frequency shear modulus) and …
Molecular Dynamics Simulation Of Irradiation Damage In Multicomponent Alloys, Wei Guo
Molecular Dynamics Simulation Of Irradiation Damage In Multicomponent Alloys, Wei Guo
Doctoral Dissertations
The development of the generation IV reactors calls for radiation resistant materials. This thesis proposes that the newly developed single phase solid solution of high-entropy alloys (HEAs) can be such candidates. HEAs can undergo the crystalline to amorphous to crystalline (C-A-C) transitions under radiation. The radiation induced amorphous structure is a highly radiation resistant medium as shown by previous studies, and it further transforms to crystalline phases without much structural defects. In this thesis, by reviewing the formation rules of solid solutions and amorphous metallic glasses, it is suggested that the atomic size plays a key role affecting the C-A-C …