Next Article in Journal
The Magnetisation Process of Bulk Amorphous Alloys: Fe36+xCo36−xY8B20, Where: x = 0, 3, 7, or 12
Next Article in Special Issue
Investigation of Microstructure Evolution and Phase Selection of Peritectic Cuce Alloy During High-Temperature Gradient Directional Solidification
Previous Article in Journal
Special Issue: Advances in Electrochemical Energy Materials
Previous Article in Special Issue
Methodology for Revealing the Phases and Microstructural Constituents of the CMSX-4 Nickel-Based Superalloy Implicating Their Computer-Aided Detection for Image Analysis
Open AccessArticle

Microstructure Evolution and Properties Tailoring of Rheo-Extruded Al-Sc-Zr-Fe Conductor via Thermo-Mechanical Treatment

1
Key Laboratory of Lightweight Structural Materials Liaoning Province, School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
2
School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
3
The CITIC Dicastal Institute, Qinhuangdao 066011, China
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(4), 845; https://doi.org/10.3390/ma13040845
Received: 31 December 2019 / Revised: 30 January 2020 / Accepted: 1 February 2020 / Published: 13 February 2020
(This article belongs to the Special Issue Structure and Mechanical Properties of Alloys)
Low-cost heat-resistant Al-Sc-Zr-Fe conductor wires were successfully manufactured by continuous rheo-extrusion process, and the mechanical and conductive properties of the materials were analyzed and compared after three different thermo-mechanical treatment methods. The coarse plate-shape Al3Fe phase transformed to small sized rod-like phase after solid solution treatment at 630 °C for 21 h. Direct aging treatment at 300 °C for 24 h led to the refinement and spheroidization of Al3Fe phase with a diameter of 200 nm. After the subsequent aging treatment at 300 °C for 24 h, the tensile strength and conductivity of the alloy wire significantly increased due to the homogeneous precipitation of the coherent spherical Al3(Sc, Zr) phase with an average size of 15 nm. The tensile strength, elongation, and conductivity of the alloy conductor wire after optimized thermo-mechanical treatment reached 165.7 MPa, 7.3%, and 60.26% International Annealed Copper Standard (IACS), respectively. The thermal resistance of the present alloy wire was superior to that of standard AT1 type alloy conductor according to IEC international standard. View Full-Text
Keywords: Al-Sc-Zr-Fe conductor; rheo-extrusion; thermo-mechanical treatment; mechanical properties; conductivity Al-Sc-Zr-Fe conductor; rheo-extrusion; thermo-mechanical treatment; mechanical properties; conductivity
Show Figures

Graphical abstract

MDPI and ACS Style

Tie, D.; Wang, Y.; Wang, X.; Guan, R.; Yan, L.; Zhang, J.; Cai, Z.; Zhao, Y.; Gao, F.; Liu, H. Microstructure Evolution and Properties Tailoring of Rheo-Extruded Al-Sc-Zr-Fe Conductor via Thermo-Mechanical Treatment. Materials 2020, 13, 845.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop