Constitutive Analysis of the Mean Flow Stress of a Nb- and N-Bearing Austenitic Stainless Steel Biomaterial

Nelson Luis Costa dos Santos Filho; Eden Santos Silva; Clodualdo Aranas Jr.; Fulvio Siciliano; Gedeon Silva Reis; Samuel Filgueiras Rodrigues

doi:10.1007/s12540-020-00777-8

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저자정보: Nelson Luis Costa dos Santos Filho (Science and Technology of Maranhão) Eden Santos Silva (Science and Technology of Maranhão) Clodualdo Aranas Jr. (University of New Brunswick) Fulvio Siciliano (Science and Technology of Maranhão) Gedeon Silva Reis (Science and Technology of Maranhão) Samuel Filgueiras Rodrigues (Science and Technology of Maranhão)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.11

발행연도: 2021.11

수록면: 4,768 - 4,779 (12page)

DOI: 10.1007/s12540-020-00777-8

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The correlation between hardening and softening in an ASTM F-1586 stainless steel used as biomaterial was investigatedby means of hot torsion simulations. Multi-pass deformation under continuous cooling was employed to simulate industrialhot rolling. Samples were subjected to 17 deformation passes of strains of 0.20 and 0.30, strain rate of 1.0 s?1 in a temperaturerange of 1250 to 930 °C. Interpass times (tp) of 5.0, 10, 20, 40, and 80 s were used. The obtained results showed directdependence of the mean flow stress (MFS) and all applied thermomechanical parameters. The work hardening rate associatedwith the degree of stress accumulation (Δσ) inhibited the metadynamic recrystallization. This led to the variation ofthe non-recrystallization temperature (Tnr), associated with intense static recovery in the material. From the experimentaldata, a constitutive function of the mean flow stress (MFS) obtained through multiple nonlinear regression technique wasproposed. The study aimed to have a better understanding of the physical metallurgy behind the thermomechanical behaviorof the steel under a multi-pass process. The results allowed to monitor the recrystallized fraction (X) and the grain size (d)during the simulated conditions.

#Austenitic stainless steel #Torsion simulation #Mean flow stress (MFS) #Mathematical modeling #Metadynamic recrystallization (MDRX) #Biomaterials

참고문헌 (37)

참고문헌 신청

L. L. Hench / 2002 / Third-generation biomedical materials / Science 295:1014~1017

E. J. Giordani / 2005 / Evidence of straininduced precipitation on a Nb and N-bearing austenitic stainless steel biomaterial / Mater. Sci. For 500:179~186

E. J. Giordani / 2004 / Effect of precipitates on the corrosion–fatigue crack initiation of ISO 5832-9 stainless steel biomaterial / Int. J. Fatigue 26:1129~1136

C. Örnhagen / 1996 / Characterization of a nitrogen-rich austenitic stainless steel used for osteosynthesis devices / J. Biol. Mater. Res. 31:97~103

M. Navarro / 2008 / Biomaterials in orthopaedics / J. R. Soc. Interface 5(27):1137~1158

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