Effect of Mn on microstructure and properties of Cu-12Al powder metallurgy alloy
Abstract
Cu-12Al-xMn (x = 0, 1, 2, 3, 4%, mass fraction) alloys were produced using powder metallurgy to investigate the effect of Mn content on the alloy's microstructure and mechanical properties. The Cu-12Al (no Mn) and Cu-12Al-1Mn (1 wt% Mn) alloys consisted of the α + γ phases, where the size of the α grains in the Cu-12Al-1Mn alloy are much larger. Mn effectively inhibited the eutectoid transformation at a concentration above 1 wt%. Furthermore, the β phase was converted to the β'-martensite phase, which had a monoclinic structure after slow cooling. The phases of the alloy changed from the α + γ phases to the α + β' + γ phases with the further addition of Mn, and the tensile strength of the 3 wt% Mn alloy was 380.59 MPa. The addition of Mn did not have a significant effect on the density of the alloy.
- Publication:
-
Materials Research Express
- Pub Date:
- January 2020
- DOI:
- 10.1088/2053-1591/ab63f8
- Bibcode:
- 2020MRE.....7a6546Z
- Keywords:
-
- Cu-Al-Mn alloy;
- powder metallurgy;
- microstructure;
- mechanical properties