Strain Rate Effects on Fracture Behavior of Austempered Ductile Irons

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.

Bonora, N.Universita di Cassino e del Lazio Meridionale (author)
Gentile, D.Universita di Cassino e del Lazio Meridionale (author)
Iannitti, G.Universita di Cassino e del Lazio Meridionale (author)
Testa, G.Universita di Cassino e del Lazio Meridionale (author)
Hörnqvist Colliander, Magnus,1979Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)magnuh (author)
Masaggia, S.Zanardi Fonderie SpA (author)
Vettore, F.Zanardi Fonderie SpA (author)
Universita di Cassino e del Lazio MeridionaleChalmers tekniska högskola (creator_code:org_t)

By the author/editor: Ruggiero, A.; Bonora, N.; Gentile, D.; Iannitti, G.; Testa, G.; Hörnqvist Collia ...; show more...; Masaggia, S.; Vettore, F.; show less...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Environmental En ...; and Mineral and Mine ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Applied Mechanic ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Other Materials ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.