Mechanical and Electrical Properties of Al-Fe-Cr and Al-Fe-Zr Alloys

被引:0
|
作者
Choi, Yong [1 ]
Hong, Sun Ig [2 ]
机构
[1] Dankook Univ, Dept Mat Sci & Engn, Cheonan 31116, South Korea
[2] Chungnam Natl Univ, Dept Nanomat Engn, Daejeon 34134, South Korea
基金
新加坡国家研究基金会;
关键词
Al Alloys; Conductivity; Strength; Hardness; LAYERED CU/AL/CU COMPOSITE; HEAT-TREATMENT; MICROCOMPOSITES; CONDUCTIVITY; DEFORMATION; BEHAVIOR;
D O I
10.1166/sam.2018.3047
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The effect of aging on the strength and conductivity of cold-rolled and fully-annealed Al-Fe-Cr and Al-Fe-Zr alloys were studied. The strength of the Al-Fe-Cr and Al-Fe-Zr alloys increased to 158 MPa and 150 MPa, respectively, with aging at 180 degrees C at the minimal expense of ductility. The stress-strain responses showed a softening behavior even after aging, suggesting that the cold-worked microstructure obtained via cold-rolling was not softened by aging at 180 degrees C. The optimum strength/conductivity obtained for the aged Al-Fe-Cr was 158 MPa/51% IACS, and the increase in electrical conductivity is accompanied by an increase in strength, which indicates that precipitation is mainly responsible for the increase in conductivity. A higher value of conductivity in the cold-rolled and aged alloys than in the fully annealed and aged counterparts implies that the gain in the conductivity due to precipitation is greater than the gain in conductivity due to the decrease of dislocation density was about 0.017.
引用
收藏
页码:480 / 483
页数:4
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