Thermo-viscoplastic behavior of 304 austenitic stainless steel at various strain rates and temperatures: Testing, modeling and validation

Autor: Raphaël Pesci, Richard Bernier, Alexis Rusinek, Slim Bahi, Bin Jia
Přispěvatelé: Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Laboratoire de Conception Fabrication Commande (LCFC), Université de Lorraine (UL)-Arts et Métiers Sciences et Technologies, Institute of Fundamental Technological Research (IPPT), Polska Akademia Nauk = Polish Academy of Sciences (PAN), Université Carlos III de Madrid
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Materials science
Matériaux [Sciences de l'ingénieur]
[PHYS.MECA.GEME]Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph]
02 engineering and technology
engineering.material
Flow stress
[SPI.MAT]Engineering Sciences [physics]/Materials
Strain rate sensitivity
0203 mechanical engineering
General Materials Science
Composite material
Austenitic stainless steel
Ballistic impact test
ComputingMilieux_MISCELLANEOUS
Civil and Structural Engineering
Viscoplasticity
Mechanical Engineering
Constitutive model
Strain hardening exponent
Strain rate
021001 nanoscience & nanotechnology
Condensed Matter Physics
304 austenitic stainless steel
020303 mechanical engineering & transports
Mechanics of Materials
Diffusionless transformation
engineering
Deformation (engineering)
Dislocation
0210 nano-technology
Temperature sensitivity
Zdroj: International Journal of Mechanical Sciences
International Journal of Mechanical Sciences, Elsevier, 2020, 170, pp.105356. ⟨10.1016/j.ijmecsci.2019.105356⟩
ISSN: 0020-7403
DOI: 10.1016/j.ijmecsci.2019.105356⟩
Popis: International audience; This paper presents a systematic study of the thermo-viscoplastic behavior of a 304 austenitic stainless steel (ASS). The experiments were conducted over a wide range of strain rates (10 − 3 s − 1 to 3270 s − 1 ) and temperatures (-163°C to 172°C), for which the deformation behavior of 304 ASS becomes more complex due to the strain- induced martensitic transformation (SIMT) effect. Dynamic tests at low/elevated temperatures were conducted using the Hopkinson technique coupled with a cooling device/heating furnace, and temperature distribution within the specimen was verified to be uniform. Experimental results showed that the strain hardening rate of 304 ASS was strongly affected by SIMT effect. For quasi-static tests (10 − 3 s − 1 to 1 s − 1 ) at low temperatures (-163°C to -20°C), the stress-strain relations exhibited an S-shape and a second strain hardening phenomenon. The strain rate sensitivity and temperature sensitivity of 304 ASS were also different from metallic materials deformed by dislocation glide. Several unexpected phenomena including the negative strain rate sensitivity and the changing temperature sensitivity from quasi-static to dynamic tests were observed. Based on experimental results, an extension of the Rusinek-Klepaczko (RK) model considering SIMT effect was used to simulate the deformation behavior of 304 ASS: it predicted flow stress curves of 304 ASS above -60°C correctly. In addition, to validate the extended RK model and the identified model parameters, numerical simulations of ballistic impact tests of 304 ASS plates at various temperatures were carried out, showing a good agreement with experiments.
Databáze: OpenAIRE
Externí odkaz: