Journal
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
Volume 103, Issue 7, Pages 814-820Publisher
CARL HANSER VERLAG
DOI: 10.3139/146.110712
Keywords
Al-Mn-Sc-Zr alloy; Cold rolling; Activation energy; Al3Sc phase; Isochronal annealing
Categories
Funding
- Czech Science Foundation [GPP107/11/P201]
Ask authors/readers for more resources
The effect of Mn addition on the microstructure, thermal and mechanical properties in as-cast and cold-rolled Al-Sc-Zr alloys was studied. Electrical resistometry, differential scanning calorimetry and microhardness measurements were used. Transmission electron microscopy, electron backscatter diffraction and X-ray diffraction of specimens quenched from temperatures of pronounced changes in resistivity helped to identify the microstructural processes responsible for resistivity changes. The distinct microhardness increase observed after annealing above similar to 320 degrees C is caused by precipitation of the Al3Sc particles. The cold-rolling prior to a heat treatment has no substantial effect on temperature position of the Al3Sc-phase precipitation. The formation of Al6Mn and/or Al-6(Mn,Fe) particles is responsible for the intensive resistivity decrease of the cold-rolled materials compared to the as-cast materials. Precipitation of these particles has an insignificant effect on microhardness. The apparent activation energy for the precipitation of the Al3Sc particles was determined.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available