Effect of strain rate on microstructural evolution and thermal stability of 1050 commercial pure aluminum

The synthesis of nanocrystalline Fe, Fe–4 wt% Al, and Fe–10 wt% Al solid solutions by SPEX ball milling has been studied. The microstructural evolution during ball milling, as well as subsequent heat treatment, has been characterized. The results demonstrate that ball milling promotes the formation of αFe–4 wt% Al and αFe–10 wt% Al solid solutions by reducing the activation energy of these alloys and generating thermal energy during this process. For Fe–10 wt% Al powders milled for various time intervals up to approximately 20 min, the FeAl intermetallic compound is formed. For alloys annealed at temperatures ranging from 600 to 1000 °C, the addition of 10 wt% Al to Fe significantly enhances the thermal stability of the nanocrystalline Fe–Al alloys. Interestingly, the addition of Al within the range of 4–10 wt% seems to have little effect on the thermal stability of these alloys annealed under the same conditions. Also, the thermal stability improves for alloys milled in air as opposed to those processed using Ar.

Download Full-text

Microstructural evolution and thermal stability of AlCr(Si)N hard coatings revealed by in-situ high-temperature high-energy grazing incidence transmission X-ray diffraction

Acta Materialia ◽

10.1016/j.actamat.2020.01.026 ◽

2020 ◽

Vol 186 ◽

pp. 545-554 ◽

Cited By ~ 6

Author(s):

N. Jäger ◽

M. Meindlhumer ◽

S. Spor ◽

H. Hruby ◽

J. Julin ◽

...

Keyword(s):

Thermal Stability ◽

High Temperature ◽

Microstructural Evolution ◽

Grazing Incidence ◽

High Energy ◽

Hard Coatings ◽

X Ray Diffraction ◽

X Ray ◽

Thermal Stability Of

Download Full-text

Effects of Mn and Zr Addition in 6000 Series Aluminum Alloys on the Formation of Stabilized Substructures during Hot Deformation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.877.281 ◽

2016 ◽

Vol 877 ◽

pp. 281-289 ◽

Cited By ~ 2

Author(s):

Hiroki Tanaka ◽

Yasunori Nagai

Keyword(s):

Heat Treatment ◽

Thermal Stability ◽

Aluminum Alloys ◽

Strain Rate ◽

Hot Deformation ◽

Fibrous Structure ◽

Deformation Parameters ◽

Zr Addition ◽

Plane Strain Compression Test ◽

Thermal Stability Of

Thermal stability of substructures in 6000 series aluminum alloys containing Mn and Zr elements was investigated using plane-strain compression test. In order to form thermally stabilized substructures, the deformation parameters should be selected so as to correlate with kinetic precipitation during the deformation. For substructures of the alloys containing Mn and Zr elements, the substructures were stable during the heat treatment at 540 ̊C when the alloys were deformed at a temperature above 350 ̊C. The sheets rolled above 350 ̊C at a strain rate of under 3 s-1 per pass showed the fibrous structure and well developed β-fiber textures after the heat treatment at 540 ̊C. The sheets with the fibrous structure had an average Lankford value larger than one.

Download Full-text