Prediction and control of subgrain size in the hot extrusion of aluminum alloys

Abstract

Strength-improved Zr-based metallic glass/porous tungsten phase composite by hydrostatic extrusion Appl. Phys. Lett. 90, 081901 (2007); Abstract. It is widely recognized that subgrain size has significant influence on the strength and ductility of metals. Modelling of subgrain size evolution is essential for the detailed understanding and control of mechanical properties. In the present paper, the evolutions of subgrain size during hot extrusion of various aluminum alloys are first predicted. A nearly constant distribution of subgrain size is pursued by iso-subgrain extrusion processes. Substructural strengthening coupled with microstructural evolution is also studied in addition to the normal thermal-mechanical coupled analysis.

The Role of a General Purpose Code in Forming Simulations

“…In many cases these issues are handled in a robust way with the tools and capabilities offered by general purpose finite element codes. Subsequently, general purpose finite element codes have been used for diverse forming applications in recent years ranging from conventional to nano-scale modeling (some samples from multiple suppliers can easily be found in the previous NUMIFORM 2004 Conference [1][2][3][4][5][6]) and continue to have a presence alongside with special purpose codes in forming simulations. Some of the key technologies behind such forming simulations are discussed first in this paper.…”

Characterization of Precipitation in Al-Zn-Mg-Cuand Li Containing Al-Zn-Mg-Cu Alloys after Isothermal Aging

“…However, for the limitation of TEM field, the results are not very reliable. In recent years, small angle X-ray scattering (SAXS) has played an important role in studying the precipitates of Al-Li, Al-Li-Cu-Mg, Al-Zn-Mg(-Cu) alloys [1,3,4,[16][17][18][19][20][21].…”