Influence of boron addition on the grain refinement and mechanical properties of AZ91 Mg alloy

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 525; no. 1; pp. 207 - 210
• Main Authors: Suresh, M., Srinivasan, A., Ravi, K.R., Pillai, U.T.S., Pai, B.C.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.11.2009; Elsevier
• Subjects: AZ91 Mg alloy; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Grain refinement; Heterogeneous nucleation; Materials science; Mechanical properties; Other heat and thermomechanical treatments; Physics; Treatment of materials and its effects on microstructure and properties; Heterogeneous nucleation; Mechanical properties; AZ91 Mg alloy; Grain refinement; Grain size; Magnesium base alloys; Optical microscopy; Impurities; Boron additions
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2009.07.019

This article reports the effect of boron addition on the grain refinement efficiency and mechanical properties of AZ91 magnesium alloy. The results show that the addition of boron in the form of Al–4B master alloy, significantly refines the grain size of AZ91 alloy. This refinement is due to the presence of AlB 2 particles, which act as potential nucleants for Mg grains. Improved mechanical properties are obtained with the addition of boron due to the finer grains.