Effects of vibration on the grain morphology of Some Tungsten Incandescent Lamp Filaments

Autor:	John L. Walter, John W. Pugh, Donald B. Sorenson
Rok vydání:	1992
Předmět:	Morphology (linguistics) Structural material Materials science Metallurgy Metals and Alloys Alternate current Condensed Matter Physics law.invention Vibration Halogen lamp Mechanics of Materials law Metallic materials Grain boundary Grain Boundary Sliding
Zdroj:	Metallurgical Transactions A. 23:2259-2262
ISSN:	2379-0180 0360-2133
Popis:	Pairs of halogen lamps were heated simultaneously at various rates of temperature increase through the recrystallization temperature and were held for five hours at 120 volts. One lamp in each of 20 pairs was vibrated during lightup. Examination of the grain boundaries of the filaments revealed that 63 pct of the boundaries in the vibrated lamps were “transverse.” In the lamps not vibrated, 52 pct of the boundaries were “transverse.” The greater number of “trans- verse” grain boundaries in the vibrated lamps is attributed to grain boundary sliding, which generates additional energy to allow the grain boundary to overcome the restraint to migration provided by the strings of potassium bubbles in the lamp wire.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::03e9543500584ffb510f45755d431b32 https://doi.org/10.1007/bf02646019 Zobrazit plný text záznamu