MEASUREMENT OF FINE PEARLITE INTERLAMELLAR SPACING BY ATOMIC-FORCE MICROSCOPY

Citation
Vtl. Buono et al., MEASUREMENT OF FINE PEARLITE INTERLAMELLAR SPACING BY ATOMIC-FORCE MICROSCOPY, Journal of Materials Science, 32(4), 1997, pp. 1005-1008
Citations number
12
Categorie Soggetti
Material Science
ISSN journal
00222461
Volume
32
Issue
4
Year of publication
1997
Pages
1005 - 1008
Database
ISI
SICI code
0022-2461(1997)32:4<1005:MOFPIS>2.0.ZU;2-4
Abstract
Pearlite interlamellar spacing is an important parameter controlling d uctility and strain hardening of carbon steels. Fine pearlite is the a ppropriate initial microstructure for drawing high carbon steel with e xponential strain hardening rate, leading to high final tensile streng ths. The majority of optical and electron microscopy methods for measu ring interlamellar spacing present difficulties when applied to fine m icrostructures. Atomic force microscopy (AFM) was employed to investig ate pearlitic steels lead patented at 510 degrees C and then cold draw n to 86% reduction in area. Conventional specimen preparation techniqu es for optical metallography were appropriated to produce high resolut ion AFM images, on which measurements of minimum interlamellar spacing , in good agreement with spacings estimated using the Embury-Fisher mo del, were easily performed.