Effect of Mg on Dynamic Properties of Al-Mg Alloys

Plastic instabilities were investigated by the depth-sensing microhardness test in binary high-purity Al–Mg alloys with different Mg contents. During the tests the applied load was increased from 0 to 2000 mN at constant loading rate. The instabilities appeared as characteristic steps in the load–depth curves during indentation. It was shown that the occurrence and development of the plastic instabilities depend strongly on the solute content. Furthermore, the plastic instabilities occurred only when the solute concentration was larger than a critical value, C0. From room-temperature tests on Al–Mg alloys, C0 was found to be 0.86 wt% Mg. The critical concentration, which is necessary to get plastic instabilities, was also interpreted theoretically.

Download Full-text

Theoretical study of the internal friction associated with bulk diffusion of solute atoms around dislocations in Al-Mg alloys

Philosophical Magazine A ◽

10.1080/014186199251120 ◽

1999 ◽

Vol 79 (12) ◽

pp. 2877-2886

Author(s):

Q. F. Fang, R. Wang

Keyword(s):

Internal Friction ◽

Theoretical Study ◽

Bulk Diffusion ◽

Mg Alloys ◽

Solute Atoms ◽

Al Mg Alloys

Download Full-text

Relationship of Microstructure and Mechanical Properties in Er-Containing Aluminum Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1120-1121.1109 ◽

2015 ◽

Vol 1120-1121 ◽

pp. 1109-1114

Author(s):

Xin Lei ◽

Hui Huang ◽

S.P. Wen

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Aluminum Alloy ◽

Treatment Process ◽

Mg Alloys ◽

The Other ◽

Heat Treatment Process ◽

Comprehensive Performance ◽

Relationship Of ◽

Al Mg Alloys

This study investigated the mechanical properties and microstructures of Er-containing Al–Mg alloys. The research found that the H114-T sheet of Er-containing Al–Mg alloys showed a relative good comprehensive performance in mechanical properties. With the special rolling and heat treatment process, this H114-T sheet showed different morphology of microstructures with the other sheets in Er-containing Al–Mg alloys. Grains in H114-T sheet performed irregular shape polygon, a number of subgrains appeared in grains, the amount of dislocations in grains decreased. H114-T sheet possessed a lot of Copper texture, this may be one of important factors influenced the mechanical properties.

Download Full-text