Microstructure evolution of carbidic austempered ductile iron at different austempering temperatures

Structural and Phase Analysis of the Ausferritic Ductile Cast Iron Matrix Obtained by Heat Treatment and in the Raw State

“…One notable example is Austempered Ductile Iron (ADI), a form of ductile cast iron strengthened through an isothermal transformation, which has been utilized since 1972 [3]. The matrix of ADI comprises a blend of high-carbon austenite and bainitic ferrite, known as ausferrite [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. This matrix is achieved through a heat treatment process involving austenitization (~900-950 • C) followed by quenching and isothermal holding (~250-400 • C).…”