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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 3    March 2018

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Enhanced mechanical properties of pure aluminium:Experimental investigation of effects of different parameters
Gholamreza Marami1, Safavi Mir Saman2, Mohammad Ali Saeimi Sadigh3

1. Department of Mechanical Engineering, Faculty of Mechanical Engineering, University of Tabriz, P.O. Box 5166616471, Tabriz, Iran; 2. Department of Materials Engineering, Faculty of Mechanical Engineering, University of Tabriz,P.O. Box 5166616471, Tabriz, Iran; 3. Department of Mechanical Engineering, Azarbaijan Shahid Madani University, P.O. Box 5375171379, Tabriz, Iran

Abstract:In current research, the interactive effects of different parameters such as melt overheating temperature, the location of gating system and incorporation of the grain refiner in bar and micro-powder form on the mechanical and structural characteristics of commercially pure aluminium are examined. Results show that increasing the melt temperature as well as employing a gating system with higher heat transfer rate increases the ultimate tensile strength (UTS) of the pure aluminium by 7%. Also, the introduction of 2wt% Al–5Ti–1B grain refiner in bar form into the overheated melt enhances the UTS values by two times, while incorporating 2wt% Al–5Ti–1B grain refiner in micro-powder form leads to achieving 32% higher UTS compared to the samples with grain refiner in the bar form due to the elimination of Al3Ti brittle phase, as confirmed by XRD patterns and SEM fracture surface images.

 

Key words: casting; grain refinement; tensile strength; microstructure; Al–5Ti–1B

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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