Micromechanical modelling of constitutive behavior of austempered ductile iron (ADI) at high strain rate

Iannitti, Gianluca; Ruggiero, Andrew; Bonora, Nicola; Masaggia, Stefano; Veneri, F.

doi:10.1016/j.tafmec.2017.05.007

Cited by 12 publications

(11 citation statements)

References 20 publications

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“…925 197 a high speed camera was also used for the DIC technique. More details about experimental setup can be found in [3]. The comparisons of the uniaxial tensile tests at different temperatures ( Fig.…”

Section: Materials and Experimentsmentioning

confidence: 99%

“…FE-based micromechanical analyses proved to be very effective in giving the resulting macroscopic properties from known characteristics at the microscale [7]. Thus, the unit cell model, developed in [3] for the same ADI, was used to simulate an uniaxial compression test in order to extend data available for the inverse calibration procedure (coefficient λ). The coefficients of the strength model and the yield surface, calibrated on results from tensile tests, are given in Table 1.…”

Section: Constitutive Modelling Developmentmentioning

confidence: 99%

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ADI 1050-6 Mechanical Behavior at Different Strain Rates and Temperatures

Ruggiero

Iannitti

Masaggia

et al. 2018

MSF

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An experimental characterization of the austempered ductile iron ISO 17804/JS/1050-6/S was performed carrying out tensile tests under different strain rates, temperatures and stress triaxiality levels. Then, composing a yield function surface, a hardening relation, and a damage criterion, a constitutive model was developed to describe the salient features of the observed macroscopic response. In particular, the Mohr-Coulomb yield function was selected to account for the pressure effect observed on the yield surface. A new hardening relation was proposed in order to account for both strain rate and temperature effects. The Bonora's damage model, developed in the framework of the continuum damage mechanics, was adopted to capture the failure condition under different stress triaxiality levels. The damage model was appropriately modified to account for the effect of strain rate and temperature on the failure strain.

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Section: Materials and Experimentsmentioning

confidence: 99%

Section: Constitutive Modelling Developmentmentioning

confidence: 99%

ADI 1050-6 Mechanical Behavior at Different Strain Rates and Temperatures

Ruggiero

Iannitti

Masaggia

et al. 2018

MSF

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“…Ductile cast iron is a fascinating engineering material for the manufacturing of different components including wear resistant parts requiring an optimized compromise between fatigue and wear, truck suspension parts, power transmission components, stones crushers and mining components, and components of various geometrical complexity, etc. [5][6][7]. Austempering is the most widely used heat treatment procedure to reach excellent combination of high strength, ductility, good wear resistance and tribo-fatigue behavior.…”

Section: Introductionmentioning

confidence: 99%

STUDY OF AUSTEMPERED DUCTILE CAST IRON ENRICHED BY PARTICULAR RATIO OF Nickel, mOLYBDENUM AND COPPER

Bendikienė

Čiuplys

Česnavičius

et al. 2020

METAL 2020 Conference Proeedings

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This research paper combines investigation of mechanical properties of austempered ductile cast iron (ADI) and comparison with standard grades of steel and cast iron. Due to the special features of both materialscatsability from cast iron, and toughness from steel, ADI attracts an attention of industry and science because of economic benefits and high performance at the different application areas. Austempered ductile iron was tested on tension where unconventional behaviour was observed: with the increase of tensile strength almost to 1600 MPa the metal became less brittle. Hardness test revealed absence of linear relation between strength and hardness, different hardness values ~ 40 HRC or ~ 55 HRC can be reached with the same tensile strength 1000 -1200 MPa. After successful tensile tests the main direction of further studies was solving relevant practical wear and fatigue problems in rail-wheel system. The complex practical studies demonstrated that ADI is consistent with heat treated steels including the rail steels: required tensile strength of rail steel ranges from 1180 MPa to 1280 MPa when rolling surface hardness is expected to be in the range of 38 HRC -44 HRC, whereas tensile strength of ADI was higher, up to 1400 MPa, and hardness slightly higher than of steel, 50 HRC. Herewith the workability of frictional couple cast iron/steel 20MnCr5G exceeded work performance of steel/steel system by 14 %. Specific properties emerged from successful ratio of three elements Mo, Ni, and Cu, and properly chosen austenitization schedule.

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“…defects like graphite particles deviating markedly from the expected shape -can play a major role. As a matter of fact, unit cell models which circumvent this issue by considering an idealized representation of the microstructure are a common choice (Andriollo et al, 2015;Collini and Nicoletto, 2005;Iannitti et al, 2017;Pina et al, 2015;Rabold and Kuna, 2005). Apart from these, procedures based on statistical approaches that avoid defining a RVE and work with smaller volume elements have been proposed (Metzger and Seifert, 2015).…”

Section: Introductionmentioning

confidence: 99%

Impact of micro-scale residual stress on in-situ tensile testing of ductile cast iron: Digital volume correlation vs. model with fully resolved microstructure vs. periodic unit cell

Andriollo¹,

Zhang²,

Fæster

et al. 2019

Journal of the Mechanics and Physics of Solids

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Micromechanical modelling of constitutive behavior of austempered ductile iron (ADI) at high strain rate

Cited by 12 publications

References 20 publications

ADI 1050-6 Mechanical Behavior at Different Strain Rates and Temperatures

ADI 1050-6 Mechanical Behavior at Different Strain Rates and Temperatures

STUDY OF AUSTEMPERED DUCTILE CAST IRON ENRICHED BY PARTICULAR RATIO OF Nickel, mOLYBDENUM AND COPPER

Impact of micro-scale residual stress on in-situ tensile testing of ductile cast iron: Digital volume correlation vs. model with fully resolved microstructure vs. periodic unit cell

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