RESEARCH ARTICLE


Influence of Homogenization on Mechanical Properties of Al-1Mn-1Mg Alloy Prepared by Different Melt-Treatments



Yonglu Chen*, 1, Lihua Hong1, Liangdeng Wang2, Wenzhe Chen1
1 School of Material Science and Engineering, Fujian University of Technology, Fuzhou, 350108, China
2 School of Machine Engineering and Automation, Fuzhou University, Fuzhou, 350108, China


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© 2013 Chen et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the School of Material Science and Engineering, Fujian University of Technology, Fuzhou, 350108, China; Tel: 86-591-22863279; Fax: 86-591-22863279; E-mail: chenyl_76@126.com


Abstract

Influence of homogenization on mechanical properties of Al-1Mn-1Mg alloy prepared by different melttreatments was discussed and mechanism of metallurgical defects on ingots' mechanical properties was analyzed. It was found that metallurgical defects, such as the inclusions and gas holes, cannot be removed from the original ingots by homogenization; the average increasement of tensile strength of the ingots prepared by comprehensive melt-treatment and homogenized at 400~500°C for 12 hours was 17.4%, and the elongation improved slightly; the better obdurability of the ingots can be obtained due to the vast reduction of crack initiation of metallurgical defects such as the inclusions, gas holes and so on; the fracture mode gave priority to the type of transcrystalline and micropore gathering; under the experiment condition, the relatively optimized processing permanents of homogenization can be obtained by heating at 450~500°C while holding for 12 hours and air cooling; the comprehensive mechanical properties of the ingots, prepared by the optimized process, can be tested as follows: σb≈180~193MPa, δ≈16.0~18.0%.

Keywords: Homogenization, melt-treatment, Al-1Mn-1Mg alloy, mechanical properties, metallurgical defects.