Influence of cooling conditions and amount of retained austenite on the fracture of austempered ductile iron

Influence of cooling conditions and amount of retained austenite on the fracture of austempered ductile iron

SEM Analysis of fracture surfaces from tensile test specimens of thick-walled, austempered ductile irons (diameter 160 mm) shows different fracture behavior depending on the austenite retained in the matrix. The results show ductile fractures only in areas containing retained austenite sections. In...

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Bibliographic Details
Main Authors: VYACHESLAV GORYANY, ECKART HOFMANN, PAUL JOSEF MAUK
Format: Article
Language:English
Published: Serbian Chemical Society 2008-01-01
Series:Journal of the Serbian Chemical Society
Subjects:
austempered ductile iron
retained austenite
fracture mechanism
Online Access:http://www.shd.org.yu/JSCS/Vol73/No1/JSCS-3692.pdf
Description
Summary:SEM Analysis of fracture surfaces from tensile test specimens of thick-walled, austempered ductile irons (diameter 160 mm) shows different fracture behavior depending on the austenite retained in the matrix. The results show ductile fractures only in areas containing retained austenite sections. In section areas without or with a very low content of retained austenite, only brittle fracture without any plastic deformation occurs. The content of retained austenite determines the amount of ductile fracture in the microstructure.
ISSN:0352-5139

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