Figures 1. Microstructures of (a) unquenched ductile cast iron (b), (c ), (d) and (e) ductile cast iron quenched in composition of palm kernel seed oil and bitumen

From

Microstrucural Investigation and Network Analysis for Austempering Process Using a Blend of Palm Kernel Oil and Bitumen on High Carbon Steel and Ductile Iron

O. C. Okwonna, B. N. Nwankwojike, F. I. Abam, C. I. Nwoye

Materials Science and Metallurgy Engineering. 2017, 4(1), 29-33 doi:10.12691/msme-4-1-3