Fracture Pattern Analysis of Bainite High-Strength Cast-Iron Commercial Products Depending on Structural Condition  Full text

K. I. Uzlov¹, A. Yu. Borisenko¹, A. N. Khulin¹, V. I. Sukhomlin²

¹ Z. I. Nekrasov Iron & Steel Institute of National Academy of Sciences of Ukraine
1 Academician Starodubov Square, Dnipropetrovsk 49050, Ukraine
² Dniprodzerzhynsk State Technical University
2 Dneprostroevska St., Dniprodzerzhynsk, Dnepropetrovsk region, Ukraine

UDC 669.131.7:669.13.017:620.18.005

Metall. Min. Ind.,  2010, Vol. 2, No. 4, pp. 291-297

Abstract

Mechanical properties, microstructure and fracture pattern of bainite nodular cast-iron after austempering are studied in the range of temperatures 260-420 °C. Nonharmonic character of function of mechanical properties change in various temperature intervals of isothermal soaking is determined. Dependence of nonharmonic behavior of function of mechanical properties on structural condition is shown. Interrelation between fracture pattern of bainite nodular cast-iron and its metallic matrix type is illustrated fractographically.

Keywords: NODULAR CAST-IRON, AUSTEMPERING, METALLIC MATRIX, LOWER BAINITE, UPPER BAINITE, STRUCTURE, ELECTRON MICROSCOPY, FRACTURE, FRACTOGRAPHY, MECHANICAL PROPERTIES, HARDNESS, DUCTILITY