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Sheggaf, Z. M.
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Publications (5/5 displayed)
- 2017Effect of rare earth addition on solidification characteristics and microstructure of ZRE1 magnesium cast alloycitations
- 2017Effect of praseodymium and erbium additions on solidification characteristics, microstructure and mechanical properties of as-cast ZRE1 magnesium alloycitations
- 2017Solidification, microstructure, and mechanical properties of the as-cast ZRE1 magnesium alloy with different praseodymium contentscitations
- 2016Effects of gadolinium on microstructure and hardness of Mg-Zn-Ce-Zr cast alloy
- 2016Effect of praseodymium addition on microstructure and hardness of cast ZRE1 magnesium alloy
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article
Effects of gadolinium on microstructure and hardness of Mg-Zn-Ce-Zr cast alloy
Abstract
The effects of 3 wt.% heavy rare earth Gadolinium (Gd) addition on the microstructure and mechanical properties (Hardness) of as-cast Mg-Zn-Ce-Zr alloy (base alloy) were investigated using optical microscopy (OM), scanning electron microscopy (SEM), energy-dispersive spectrum (EDS), X-ray diffraction (XRD) and Vickers hardness. The purpose of this research is to investigate the variations occured in grain size and the formation of intermetallics with Gd addition, as well as their effect on hardness. The results of microstructure indicated that Gd addition led to significant grain refinement, which decreased by 28%. Both grain refinement and hard secondary phases (Mg,Zn)12RE and (Mg,Zn)3RE led to the improvement in hardness of Mg-Zn-Ce-Zr by 34%.<br/><br/>