Effect of Conform Process on Evolution of Microstructure and Properties of Al-0.5Fe Alloy

doi:10.11901/1005.3093.2023.605

Chinese Journal of Materials Research

2024, Vol. 38

Issue (11): 821-827 DOI: 10.11901/1005.3093.2023.605

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Effect of Conform Process on Evolution of Microstructure and Properties of Al-0.5Fe Alloy

SUN Huachen¹^,²^,³, ZHANG Duo¹^,³(

), LIU Xudong¹^,³, SU Juntian¹^,³, JIANG Haichang¹^,³

1 CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
3 Shi -changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

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SUN Huachen, ZHANG Duo, LIU Xudong, SU Juntian, JIANG Haichang. Effect of Conform Process on Evolution of Microstructure and Properties of Al-0.5Fe Alloy. Chinese Journal of Materials Research, 2024, 38(11): 821-827.

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Abstract

There are many hard primary phases in Al-Fe alloy, which are prone to stress concentration during deformation, leading to alloy fracture and significantly increasing the wire breakage rate of aluminum alloy wires. In order to break down the primary secondary phase in the alloy and refine the microstructure of the alloy, this paper introduces the so-called “Conform process” i.e. continuous extrusion process in the preparation of Al-0.5Fe alloy wires. Correspondingly the evolution of the microstructure and properties of Al-0.5Fe alloy were characterized by means of scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), transmission electron microscopy (TEM) and tensile testing machine. The results showed that after 1st pass, the tensile strength and EC of the alloy increased simultaneously, with the tensile strength increasing from 76.3 MPa to 90.2 MPa and the electric conductivity (EC) increasing from 62.0% IACS to 62.3% IACS; With the increase of conform passes, the tensile strength, EC, and equivalent size of the primary phase all show a decreasing trend. After 4th pass, the tensile strength decreases to 78.4 MPa, the EC decreases to 61.95% IACS, and the equivalent size of the primary phase decreases to 0.31 μm. Through comparative analysis of the microstructures, it was found that with the increase of Conform passes, the decrease of EC may be ascribed to the gradual decrease in size and area fraction of the secondary phase

Key words: metallic materials Al-Fe alloy conform secondary phase electrical conductivity (EC)

Received: 25 December 2023

ZTFLH:

TG379

Fund: China Postdoctoral Science Foundation(2022M713215);Guangxi Science and Technology Major Program(2023AA08011);Experimental Certification Project in the Pilot Base(2022JH24/10200034)

Corresponding Authors: ZHANG Duo, Tel: (024)23971985, E-mail: dzhang15s@imr.ac.cn

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	SUN Huachen
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https://www.cjmr.org/EN/10.11901/1005.3093.2023.605 OR https://www.cjmr.org/EN/Y2024/V38/I11/821

Fig.1 Specimen of room-temperature tensile (unit: mm)

Fig.2 SEM results of Al-0.5Fe alloy (a) cast alloys, (b) conventional extrusion, (c) conform 1st pass, (d) conform 2nd pass, (e) conform 3rd pass, (f) conform 4th pass

Table 1 Statistical results of primary equivalent diameter and area fraction of Al-0.5Fe alloys

Fig.3 TEM results in different process Al-0.5Fe alloys (a, c) conventional extrusion; (b, d) conform 4th pass

Fig.4 EBSD results in different process Al-0.5Fe alloys (a) conventional extrusion, (b) conform 1st pass, (c) conform 2nd pass, (d) conform 3rd pass, (e) conform 4th pass

Table 2 Grain size and proportion of grain boundaries of Al-0.5Fe alloy

Fig.5 Different process Al-Fe alloy GOS maps (a) conventional extrusion, (b) conform 1st pass, (c) conform 2nd pass, (d) conform 3rd pass, (e) conform 4th pass

Fig.6 Statistical results of recrystallized grain ratio and GND of different pass alloys in Al-0.5Fe alloy (0 pass for conventional extrusion)

Fig.7 Tensile strength and EC of Al-0.5Fe alloy with different passes

Fig.8 TEM results in different process Al-0.5Fe alloys (a) conform 1st pass, (b) conform 4th pass

Table 3 Area fraction of Al-0.5Fe alloy with different conform pass

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