The microstructural characteristics of unalloyed ductile iron austempered at various temperatures for various times have been characterized and correlated to Charpy impact toughness. Scanning electron microscopy has been used to reveal the microstructural details of the austempering process for polished and etched specimens at high magnifications as well as revealing fracture surface characteristics. X-ray diffraction techniques and nondestructive magnetic permeability measurements were used to estimate the amount of retained austenite present in these structures.
|Original language||English (US)|
|Number of pages||10|
|Journal||Transactions of the American Foundrymen's Society|
|State||Published - Dec 1 1983|
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