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Modified Johnson-Cook Constitutive Model for Dynamic Compressive Behaviors of C250 Maraging Steel at Different Temperatures
Department of Mechanical Engineering, University of Manitoba,Winnipeg (CAN).
Department of Mechanical Engineering, University of Manitoba,Winnipeg (CAN).
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för maskinteknik. (KAMPT)ORCID-id: 0000-0001-9065-0741
Department of Mechanical Engineering, University of Manitoba,Winnipeg (CAN).
2024 (Engelska)Ingår i: Journal of materials engineering and performance (Print), ISSN 1059-9495, E-ISSN 1544-1024Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Constitutive modeling is a crucial approach for understanding and predicting material behavior under ballistic impact, high-speed cutting, and hot metal deformation. To develop an appropriate constitutive model in this study, dynamic compression tests are conducted at various strain rates (700 s-1 to 1700 s-1) and deformation temperatures (298 K to 823 K) on C250 maraging steel by using the direct impact Hopkinson pressure bar technique. The experimental findings elucidate the coupled influences of strain rate and strain, as well as strain rate and temperature, on the dynamic compressive behavior of C250 maraging steel. To accurately predict the flow behavior of C250 maraging steel under different strain rates and deformation temperatures, this study develops modified Johnson-Cook models, which draw from both experimental data and the original Johnson-Cook model. Unlike the original model, the modified model accounts for the coupled effects of strain rate and strain, as well as strain rate and temperature. Consequently, the predicted flow stresses by the modified Johnson-Cook models are in excellent agreement with the observed flow behavior of C250 maraging steel, compared to the original model. Furthermore, verification tests that are used to evaluate the predictive capabilities of the model under new dynamic compression conditions confirm its ability to accurately predict the flow behavior of C250 maraging steel under various conditions.  

Ort, förlag, år, upplaga, sidor
Springer, 2024.
Nyckelord [en]
Compression testing; Constitutive models; Maraging steel; Metal cutting; Strain rate; C250 maraging steel; Compressive mechanical behavior; Deformation temperatures; Different deformation temperature; Direct impact; Direct impact hopkinson pressure bar; Dynamic compressive mechanical behavior; Hopkinson pressure bar; Johnson-Cook model; Modified johnson-cook model; Forecasting
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URN: urn:nbn:se:hv:diva-22286DOI: 10.1007/s11665-024-09617-xISI: 001238474900007Scopus ID: 2-s2.0-85195092925OAI: oai:DiVA.org:hv-22286DiVA, id: diva2:1927790
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This work is supported by the Natural Sciences and Engineering Research Council (NSERC) of Canada.

Tillgänglig från: 2025-01-15 Skapad: 2025-01-15 Senast uppdaterad: 2025-01-17Bibliografiskt granskad

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Andersson, Joel

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