Strain Rate Effects on Fracture Behavior of Austempered Ductile Irons
Paper i proceeding, 2018

In this work, the mechanical behavior of the austempered ductile iron (ADI) JS/1050-6 was investigated, with particular attention to the strain rate effects on the material ductility. Tensile tests at different strain rates (up to 103 s(-1)) and temperatures (ranging from 213 to 343 K) were performed. Samples with different geometries, smooth and round notched bars, were used to evaluate the effect of the stress triaxiality level on the strain at fracture. For each configuration, the evolution paths of stress and strain were extracted in the point where failure is expected performing numerical analyses at the continuum scale. Stress histories were used as input in a micromechanics analysis aimed to analyze the heterogeneous state of stress, determined by the presence of the graphite nuclei, under the different loading conditions obtained in the experiments. The main result is that, under dynamic conditions, the stress field redistribution, due to the adiabatic condition, postpones the failure occurrence, regardless temperature and strain rate effects on the matrix ductility.

Författare

A. Ruggiero

Universita di Cassino e del Lazio Meridionale

N. Bonora

Universita di Cassino e del Lazio Meridionale

D. Gentile

Universita di Cassino e del Lazio Meridionale

G. Iannitti

Universita di Cassino e del Lazio Meridionale

G. Testa

Universita di Cassino e del Lazio Meridionale

Magnus Hörnqvist Colliander

Chalmers, Fysik, Materialens mikrostruktur

S. Masaggia

Zanardi Fonderie SpA

F. Vettore

Zanardi Fonderie SpA

AIP Conference Proceedings

0094-243X (ISSN) 1551-7616 (eISSN)

Vol. 1979 UNSP 070028

20th Biennial Conference of the Topical-Group of the American-Physical-Society (APS) on Shock Compression of Condensed Matter (SCCM)
St Louis, MO, USA,

Ämneskategorier

Mineral- och gruvteknik

Teknisk mekanik

Annan materialteknik

DOI

10.1063/1.5044837

Mer information

Senast uppdaterat

2018-10-08