Evolution of Annealing Twins in a Hot Deformed Nickel-Based Superalloy.

The hot deformation characteristics of a GH4169 superalloy are investigated at the temperature and strain rate ranges of 1193-1313 K and 0.01-1 s, respectively, through Gleeble-3500 simulator. The hot deformed microstructures are analyzed by optical microscopy (OM), transmission electron microscopy (TEM), and electron backscattered diffraction (EBSD) technology.

[Manipulative reduction and lateral percutaneous K-wire fixation for treatment of supracondylar humerus fractures in 128 children].

Objective: To explore the clinical effect of manipulative reduction and lateral percutaneous K-wire fixation on supracondylar humerus fractures.

Methods: From Feb. 2004 to Jun.