Comparison among Different Constitutive Equations on Investigating Tensile Plastic Behavior and Microstructure in Austempered Ductile Iron

• Autorzy: Angella G. , Zanardi F.

Identyfikatory

DOI

10.7494/jcme.2018.2.1.14

• Języki publikacji: EN

Abstrakty

EN

The capabilities of different constitutive equations of approximating the tensile flow curves and correlating plastic behavior with the microstructure were investigated in austempered ductile iron ADI 1050. In a previous paper, the microstructure evolution of ADI 1050 during austempering was investigated through quenching the ADI 1050 after 14 increasing austempering times to room temperature. The 14 samples were tensile tested and two classes of constitutive equations were examined in the present paper. The Hollomon-type constitutive equations approximated all of the tensile flow curves of ADI 1050 very well but failed in correlating the plastic behavior with microstructure evolution. Voce-type constitutive equations approximated the tensile flow curves only at high stresses very well but could correlate the plastic behavior with the microstructure evolution of ADI 1050 during austempering excellently. The reason of this success was rationalized in terms of the physical basis of Voce-type equations, while Hollomon-type equations are empirical.

Słowa kluczowe

EN

tensile testing; mechanical properties; constitutive equations; microstructure; austempered ductile irons

• Wydawca: AGH University of Science and Technology Press
• Czasopismo: Journal of Casting & Materials Engineering
• Rocznik: 2018
• Tom: Vol. 2, no. 1
• Strony: 14--23
• Opis fizyczny: Bibliogr. 38 poz., fot., tab., wykr.

Twórcy

autor

Angella G.

• National Research Council of Italy (CNR), Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), Via R. Cozzi 53, 20125 Milan (MI), Italy

autor

Zanardi F.

• Zanardi Fonderie S.p.A., Via Nazionale 3, 37046 Minerbe (VR), Italy

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).