Search

Your search keyword '"M.R. Xie"' showing total 2 results
Start Over Author "M.R. Xie"
2 results on '"M.R. Xie"'

1. Investigation of spectroscopic factors of deeply-bound nucleons in drip-line nuclei with the Gamow shell model

Author

M.R. Xie, J.G. Li, N. Michel, H.H. Li, S.T. Wang, H.J. Ong, and W. Zuo

Subjects
Spectroscopic factor, Continuum coupling, Gamow shell model, Overlap function, Deeply-bound nucleon, Physics, QC1-999
Abstract

Spectroscopic factors involving well bound nucleons in light nuclei are calculated with standard shell model, no-core shell model and Gamow shell model. Continuum coupling is included exactly in the Gamow shell model, due to the use of the Berggren basis, which contains bound, resonance and scattering states. Conversely, it is absent from standard and no-core shell models, where a basis of harmonic oscillator states is used. As the A−1 nuclei for which spectroscopic factors are calculated are either weakly bound or unbound, coupling to continuum is prominent, even though the A nuclei are well bound. It is then showed that Gamow shell model can properly reproduce experimental data and is a predictive tool for detailed nuclear structure at drip-line, contrary to standard and no-core shell model.

Published
2023
Full Text
View/download PDF

2. Microstructures and mechanical properties of Ti–24Al–17Nb (at.%) laser beam welding joints

Author

G.Q. Wang, Jialie Ren, Aiping Wu, Guisheng Zou, Hongjie Zhang, X. Liu, and M.R. Xie

Subjects
Heat-affected zone, Materials science, Mechanical Engineering, Alloy, Metallurgy, Metals and Alloys, Laser beam welding, General Chemistry, Welding, engineering.material, Microstructure, law.invention, Mechanics of Materials, law, Ultimate tensile strength, Materials Chemistry, engineering, Composite material, Ductility, Tensile testing
Abstract

Laser beam welding of Ti–24Al–17Nb (at.%) alloy was conducted to investigate the microstructures and the mechanical properties of its joints. The results indicated that the weld microstructure consisted primarily of retained ordered β phase (namely B2 phase) and was independent of the laser welding parameters, while the size and the orientation of the weld solidification structures and then the bend ductility of the joints were related to the welding conditions. The microstructures became coarser and the strains of inducing crack and fracturing decreased as the heat input increased. The fracture occurred in the base metal when the transverse tensile test of the joints was conducted. The tensile strength of the joints was equal to that of the base material and the tensile ductility could reach 12∼17%, which was near to that of the base material.

Published
2002

Catalog

Books, media, physical & digital resources
See catalog results