Search results

Sort By:

Limit search:

On the core width and Peierls stress of bubble rafts dislocations within the framework of modified Peierls-Nabarro model

100%

Wu X., Liu L., Wang R., Ji N.

Open Physics

2011

vol. 9

issue 4

1090-1095

Using Foreman’s method, the core structure and Peierls stress of dislocations in bubble rafts have been investigated within the framework of the modified Peierls-Nabarro (P-N) model in which the discrete lattice effect is taken into account. The core width obtained from the modified P-N model is much wider than that from the P-N model owing to the discrete lattice effect. It is found that the core width of dislocation increases with a decrease of the bubble radius. The elastic strain energy associated with the discrete effect is considered while calculating the Peierls stress. The new expression of the Peierls stress obtained in this paper is not explicitly dependent on the particular form of the restoring force law, which is only related to the core structure parameter and can be used expediently to predict the Peierls stress of dislocations. The Peierls stress decreases rapidly with the decrease of the bubble radius.

High temperature and pressure effects on the elastic properties of B2 intermetallics AgRE

88%

Liu L., Wu X., Li W., Wang R., Liu Q.

Open Physics

2015

vol. 13

issue 1

The high temperature and pressure effects on the elastic properties of the AgRE (RE=Sc, Tm, Er, Dy, Tb) intermetallic compounds with B2 structure have been performed from first principle calculations. For the temperature range 0-1000 K, the second order elastic constants for all the AgRE intermetallic compounds follow a normal behavior: they decrease with increasing temperature. The pressure dependence of the second order elastic constants has been investigated on the basis of the third order elastic constants. Temperature and pressure dependent elastic anisotropic parameters A have been calculated based on the temperature and pressure dependent elastic constants.

Refine search results

2 Open Physics

1 2015

1 2011

2 Liu L.

2 Wang R.

2 Wu X.

1 Ji N.

1 Li W.

1 Liu Q.

Search results

On the core width and Peierls stress of bubble rafts dislocations within the framework of modified Peierls-Nabarro model

High temperature and pressure effects on the elastic properties of B2 intermetallics AgRE