The effect of ball milling and wet blending on the creep behaviour of a particle reinforced 2124 Al-alloy Dedicated to Prof. Bernhard Wielage on the occasion of his 65 th birthday
Abstract The creep behaviour of an AW2124 Al-alloy unreinforced and reinforced with 25 vol.% of SiC particles of different sizes is investigated. The materials were produced via powder metallurgy using two powder blending techniques: ball milling and wet blending. The SiC particles are fractured dur...
Saved in:
| Published in | International journal of materials research Vol. 102; no. 8; pp. 982 - 992 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
01.08.2011
|
| Online Access | Get full text |
Cover
Loading…
| Summary: | Abstract
The creep behaviour of an AW2124 Al-alloy unreinforced and reinforced with 25 vol.% of SiC particles of different sizes is investigated. The materials were produced via powder metallurgy using two powder blending techniques: ball milling and wet blending. The SiC particles are fractured during ball milling resulting in 2 – 3 vol.% of sub-μm SiC particles. The SiC particles in the wet blended composites are in the μm-range. The creep behaviour of the matrices and the ball milled composites is characterized by a low-stress and a high-stress region. In the low-stress region the creep deformation is governed by viscous drag of dislocations, while climb of dislocations dominates in the high-stress region. The high creep resistance exhibited by the ball milled composites is mainly due to the presence of oxide dispersoids introduced during blending of the powders. |
|---|---|
| ISSN: | 1862-5282 2195-8556 |
| DOI: | 10.3139/146.110553 |