ELASTIC-PLASTIC BEHAVIOUR OF ADVANCED ADI STUDIED BY IN-SITU SEM TENSILE TEST

0435959 - ÚFM 2015 RIV CZ eng C - Conference Paper (international conference)
Petrenec, M. - Tesařová, H. - Krahula, Karel - Polák, Jaroslav
ELASTIC-PLASTIC BEHAVIOUR OF ADVANCED ADI STUDIED BY IN-SITU SEM TENSILE TEST.
METAL 2013 Conference Proceedings. 22nd International Conference on Metallurgy and Materials. Ostrava: TANGER Ltd, 2013, s. 676-681. ISBN 978-80-87294-41-3.
[METAL 2013 - International Conference on Metallurgy and Materials /22./. Brno (CZ), 15.05.2013-17.05.2013]
Institutional support: RVO:68081723
Keywords : ADI with nickel alloying * in-situ tensile test * mechanical properties * deformation mechanisms * SEM-FEG
Subject RIV: JL - Materials Fatigue, Friction Mechanics

In-situ SEM tensile tests at room temperature have been performed on flat specimen of advanced austempered ductile cast iron (ADI) alloyed with nickel with the aim to study elastic-plastic behavior together with the nucleation and growth of cracks. During tensile loading the systematic observation of selected locations was studied. The in-situ observation was used to elucidate the tensile curves in agreement with the deformation mechanisms. In the early stage of loading the stress-strain response is elastic. After exceeding elastic limit decohesion of graphite nodules from the matrix was observed. It can be related to the departure of the tensile curve from the elastic behavior. The cracks initiated preferably from interface of graphite nodule and the ausferrite matrix. Elastic-plastic region is connected with the plastic deformation of the matrix and growth and linking of short cracks.
Permanent Link: http://hdl.handle.net/11104/0239887