Preliminary communication

Fatigue crack growth behavior of nodular cast iron subjected to two-step austempering

Andoko ; Mechanical Engineering, State University of Malang, Indonesia
P. Puspitasari ; Mechanical Engineering, State University of Malang, Indonesia
F. Gapsari ; Mechanical Engineering, Brawijaya University, Indonesia

Abstract

This research aimed to investigate the fatigue crack behaviorof nodular cast iron heat-treated with two-step austempering. In this study, the material was initially reheated at 260 °C for 10 minutes, and then the temperature was increased to 280 °C, 310 °C, and 340 °C with the holding time of 60 minutes and 120 minutes. The results of these treatments showed that slower fatigue crack propagation occurred at the austempering temperature of 340 °C with 60-minutes holding time than those at lower temperatures (280 °C and 310 °C) and with longer time (120 minutes). The maximum fatigue crack propagation resistance occurred at the holding time of 60 minutes compared to that at the 120 minutes holding time.

Keywords

nodular cast iron; heat treatment; austempering; temperature; fatigue crack

Hrčak ID:

201752

URI

https://hrcak.srce.hr/201752

Publication date:

1.10.2018.

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