Effect of twin boundary segregation on damping properties in magnesium alloy. (1st March 2017)

• Record Type: Journal Article
• Authors: Somekawa, Hidetoshi; Watanabe, Hiroyuki; Basha, Dudekula Althaf; Singh, Alok; Inoue, Tadanobu
• Is Part Of: Scripta materialia. Volume 129(2017)
• Page Start: 35
• Page End: 38
• Publication Date: 2017-03-01
• Subjects: Magnesium alloy -- Deformation twin -- Damping capacity -- Hardness -- Segregation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.10.019
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The effect of solute segregation at deformation twin boundaries on the strength (hardness) and damping capacity was investigated using an extruded Mg-Y binary alloy. The existence of deformation twin brought about an increase in both the hardness and the damping capacity. However, a subsequent annealing had a different effect, in which segregation at twin boundaries led to a decrease in the damping capacity. This is because the segregation of yttrium stabilized the twin boundaries; as a result, these boundaries inhibited alternate shrinkage and growth of deformation twin, by which the vibration energy is absorbed. Graphical abstract: