High strength and high electrical conductivity of UFG Al-2%Fe alloy achieved by high-pressure torsion and aging

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Cubero-Sesin, J.M.^1,2 ; Arita, M.^1 ; Watanabe, M.^3 ; Horita, Z.^1,2

Department of Materials Science and Engineering, Kyushu University, 819-0395 Fukuoka, Japan^1

WPI, International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Japan^2

Department of Materials Science and Engineering, Lehigh University, Bethlehem, 18015, United States^3

关键词: Average grain size;    Electrical conductivity;    High electrical conductivity;    High pressure torsions;    High strength;    High-tensile strength;    Peak aged conditions;    Ultra fine grain;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012117/pdf
DOI  :  10.1088/1757-899X/63/1/012117

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this study, Al-2%Fe samples extracted from a cast ingot in the shape of rings were processed by High-Pressure Torsion (HPT) at room temperature. Suitable specimens were extracted for evaluation of mechanical properties and electrical resistivity. High tensile strength of ∼600 MPa was attained by HPT due to grain refinement down to an average grain size of ∼130 nm and by subsequent aging accompanied by nano-sized (∼10 nm) AhFe precipitates. The resulting conductivity (IACS%) was recovered from ∼40% in the steady state after HPT to well above 50% in the peak-aged condition, which is in the range of current Al electrical alloys.