Microstructure of Austempered Ductile Iron

Microstructure of austempered ductile iron tint etched with Beraha’s CdS reagent containing large graphite nodules (arrow), bainite (blue and brown), also called “ausferrite” and retained austenite (white) when viewed with polarized light plus sensitive tint. Original at 500X.
Microstructure of austempered ductile iron containing “ausferrite” needles and retained austenite. The specimen was etched with aqueous 10% sodium metabisulfite and the magnification bar is 10 µm long.


The articles and presentations that can be down-loaded from this web site are based upon work done by GFV while employed at Bethlehem Steel (1967-1983), Carpenter Technology (1983-1996), Buehler Ltd. (1996-2009) and Struers (2009-Present) and from the authors consulting work for companies such as, Latrobe Steel, Scot Forge, etc., and from his litigation work. GFV's bylined articles appearing in various issues of the ASM Handbook series have been listed here courtesy of ASM International, Materials Park, Ohio.