engleski

Retained Austenite and Residual Stress in Low Alloyed Austempered Ductile Cast Iron

In recent years the interest in austempered ductile iron (ADI) has increased. ADI is characterized by a high degree of toughness, strength, fatigue strength and wear resistance. Samples were prepared by austenitizing (900 C / 90 min.) and austempering at 380 C (for 0,60,120,240 and 360 min.) in a salt bath.The ground and etched samples were examined az eoom temperature usin a Philips counter diffractometer with monochromatized CoK(alpha) radiation and a graphite monochromator.The retained austenite and residual stress were determinated following the procedure of Jatezak and co-workers and Gorelik and co-workers. The obtained values showed differences between the values measured during austempering. They also indicated correlation between residual stress values and accuracy of determination pf retained austenite in ADI material.

reteined austenite; residual stress; ductile cast iron; low alloyed

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