Characterization and Elimination of Defects in Metallic Glass Honeycomb
Mahadevan, Ganapathi Ranjan
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This work focuses on quantification and elimination of defects in the new class of amorphous metallic glass honeycombs (MGH) developed in 2009. A new lab scale method of manufacturing was devised to produce defect free MGH, and it has reduced cell wall misorientation from 15� to 1.5� and also yielded a more uniform cell geometry. A threefold improvement in the strength of MGH was observed with the use of this new manufacturing method. MG Honeycombs have exhibited 20% higher crush strength and 20% higher peak strength than Al honeycombs of higher relative density. The effect of cell axis misorientation on honeycomb strength related to the effect of inclined loads on honeycomb strength was studied using skewed aluminum honeycomb sections with different cell axis inclinations. A sigmoidal decrease in the strength of honeycombs with increasing loading angles was found. This research gives insight into the potential of Metallic Glass Honeycombs as structural materials. It also suggests the advantages expected for more precise automated mass production of the new material. Further, it helps in understanding the effect of inclined loads on honeycomb performance.
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