Effects of Zr, Ti and B on structure and tensile properties of Al–10Mg alloy (A520)

Authors: Emamy, M.; Daman, A.R.; Taghiabadi, R.; Mahmudi, M.

Source: International Journal of Cast Metals Research, Volume 17, Number 1, January 2004 , pp. 17-22(6)

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Abstract:

The present study was undertaken to investigate the effects of some grain refining elements on the microstructure, macrostructure and tensile properties of Al–10Mg alloy (A520). The different master alloys used in this research were: Al–7Zr, Al–6Ti, Al–4B and Al–5Ti–1B. The results showed that the additions for best grain refinement were 4.5 wt-%Al–7Zr (0.3 wt-%Zr), 6 wt-%Al–6Ti (0.4 wt-%Ti), 7.7 wt-%Al–4B (0.3 wt%B) and 2 wt-%Al–5Ti–1B (0.1 wt-%Ti). The optimum amount for each grain refining material was selected as 3, 3, 5 and 2 wt-% for tensile test studies. The tensile strength of 190 MPa (average) was found to be increased to a maximum of 290 MPa (average) for samples refined with 2 wt-%Al–5Ti–1B. The elongation was increased from 4% to a maximum of 18% when refined with Al– 7Zr. SEM fractography of the fractured face of high tensile specimens showed a minimum of shrinkage porosity and oxide films.

Keywords: AL-MG ALLOY; TENSILE PROPERTIES; MICROSTRUCTURE; GRAIN REFINING

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/136404604225017573

Publication date: 2004-01-01

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