This paper provides an in-depth study and description of cavitation damage and microstructural changes in two types of unalloyed austempered ductile iron (ADI). ADI materials used were austempered at 300 and 400 degrees C having ausferrite microstructure with 16 and 31.4% of retained austenite, respectively. Metallographic examination was carried out to study the morphology of their cavitation-damaged surfaces. Cavitation damage was initiated at graphite nodules as well as in the interface between a graphite nodule and an ausferrite matrix. Furthermore, microcracking and ferrite/retained austenite morphology were proved to be of great importance for cavitation resistance. Mass loss rate revealed that ADI austempered at 400 degrees C has a higher cavitation resistance in water than ADI austempered at 300 degrees C. A higher amount of retained austenite in ADI austempered at 400 degrees C played an important role in increasing cavitation resistance. The good cavitation behaviour of ADI a...ustempered at 400 degrees C was due to the matrix hardening by stress assisted phase transformation of retained austenite into martensite (SATRAM) phenomenon, as shown by X-ray diffraction analysis.
Keywords:
Cavitation / Unalloyed austempered ductile iron / Austempering temperature / SATRAM phenomenon
TY - JOUR
AU - Dojčinović, Marina
AU - Erić, Olivera
AU - Rajnović, Dragan
AU - Šiđanin, Leposava
AU - Baloš, Sebastijan
PY - 2013
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2430
AB - This paper provides an in-depth study and description of cavitation damage and microstructural changes in two types of unalloyed austempered ductile iron (ADI). ADI materials used were austempered at 300 and 400 degrees C having ausferrite microstructure with 16 and 31.4% of retained austenite, respectively. Metallographic examination was carried out to study the morphology of their cavitation-damaged surfaces. Cavitation damage was initiated at graphite nodules as well as in the interface between a graphite nodule and an ausferrite matrix. Furthermore, microcracking and ferrite/retained austenite morphology were proved to be of great importance for cavitation resistance. Mass loss rate revealed that ADI austempered at 400 degrees C has a higher cavitation resistance in water than ADI austempered at 300 degrees C. A higher amount of retained austenite in ADI austempered at 400 degrees C played an important role in increasing cavitation resistance. The good cavitation behaviour of ADI austempered at 400 degrees C was due to the matrix hardening by stress assisted phase transformation of retained austenite into martensite (SATRAM) phenomenon, as shown by X-ray diffraction analysis.
PB - Elsevier Science Inc, New York
T2 - Materials Characterization
T1 - Effect of austempering temperature on cavitation behaviour of unalloyed ADI material
EP - 72
SP - 66
VL - 82
DO - 10.1016/j.matchar.2013.05.005
ER -
@article{
author = "Dojčinović, Marina and Erić, Olivera and Rajnović, Dragan and Šiđanin, Leposava and Baloš, Sebastijan",
year = "2013",
abstract = "This paper provides an in-depth study and description of cavitation damage and microstructural changes in two types of unalloyed austempered ductile iron (ADI). ADI materials used were austempered at 300 and 400 degrees C having ausferrite microstructure with 16 and 31.4% of retained austenite, respectively. Metallographic examination was carried out to study the morphology of their cavitation-damaged surfaces. Cavitation damage was initiated at graphite nodules as well as in the interface between a graphite nodule and an ausferrite matrix. Furthermore, microcracking and ferrite/retained austenite morphology were proved to be of great importance for cavitation resistance. Mass loss rate revealed that ADI austempered at 400 degrees C has a higher cavitation resistance in water than ADI austempered at 300 degrees C. A higher amount of retained austenite in ADI austempered at 400 degrees C played an important role in increasing cavitation resistance. The good cavitation behaviour of ADI austempered at 400 degrees C was due to the matrix hardening by stress assisted phase transformation of retained austenite into martensite (SATRAM) phenomenon, as shown by X-ray diffraction analysis.",
publisher = "Elsevier Science Inc, New York",
journal = "Materials Characterization",
title = "Effect of austempering temperature on cavitation behaviour of unalloyed ADI material",
pages = "72-66",
volume = "82",
doi = "10.1016/j.matchar.2013.05.005"
}
Dojčinović, M., Erić, O., Rajnović, D., Šiđanin, L.,& Baloš, S.. (2013). Effect of austempering temperature on cavitation behaviour of unalloyed ADI material. in Materials Characterization
Elsevier Science Inc, New York., 82, 66-72.
https://doi.org/10.1016/j.matchar.2013.05.005
Dojčinović M, Erić O, Rajnović D, Šiđanin L, Baloš S. Effect of austempering temperature on cavitation behaviour of unalloyed ADI material. in Materials Characterization. 2013;82:66-72.
doi:10.1016/j.matchar.2013.05.005 .
Dojčinović, Marina, Erić, Olivera, Rajnović, Dragan, Šiđanin, Leposava, Baloš, Sebastijan, "Effect of austempering temperature on cavitation behaviour of unalloyed ADI material" in Materials Characterization, 82 (2013):66-72,
https://doi.org/10.1016/j.matchar.2013.05.005 . .
