TY - JOUR
T1 - Dynamic mechanical response of biomedical 316L stainless steel as function of strain rate and temperature
AU - Lee, Woei Shyan
AU - Chen, Tao Hsing
AU - Lin, Chi Feng
AU - Luo, Wen Zhen
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2011
Y1 - 2011
N2 - A split Hopkinson pressure bar is used to investigate the dynamic mechanical properties of biomedical 316L stainless steel under strain rates ranging from 1 × 10 3 s -1 to 5 × 10 3 s -1 and temperatures between 25 °C and 800 °C. The results indicate that the flow stress, work-hardening rate, strain rate sensitivity, and thermal activation energy are all significantly dependent on the strain, strain rate, and temperature. For a constant temperature, the flow stress, work-hardening rate, and strain rate sensitivity increase with increasing strain rate, while the thermal activation energy decreases. Catastrophic failure occurs only for the specimens deformed at a strain rate of 5 × 10 3 s -1 and temperatures of 25 °C or 200 °C. Scanning electron microscopy observations show that the specimens fracture in a ductile shear mode. Optical microscopy analyses reveal that the number of slip bands within the grains increases with an increasing strain rate. Moreover, a dynamic recrystallisation of the deformed microstructure is observed in the specimens tested at the highest temperature of 800 °C.
AB - A split Hopkinson pressure bar is used to investigate the dynamic mechanical properties of biomedical 316L stainless steel under strain rates ranging from 1 × 10 3 s -1 to 5 × 10 3 s -1 and temperatures between 25 °C and 800 °C. The results indicate that the flow stress, work-hardening rate, strain rate sensitivity, and thermal activation energy are all significantly dependent on the strain, strain rate, and temperature. For a constant temperature, the flow stress, work-hardening rate, and strain rate sensitivity increase with increasing strain rate, while the thermal activation energy decreases. Catastrophic failure occurs only for the specimens deformed at a strain rate of 5 × 10 3 s -1 and temperatures of 25 °C or 200 °C. Scanning electron microscopy observations show that the specimens fracture in a ductile shear mode. Optical microscopy analyses reveal that the number of slip bands within the grains increases with an increasing strain rate. Moreover, a dynamic recrystallisation of the deformed microstructure is observed in the specimens tested at the highest temperature of 800 °C.
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U2 - 10.1155/2011/173782
DO - 10.1155/2011/173782
M3 - Article
C2 - 22216015
AN - SCOPUS:84862932204
VL - 2011
JO - Bioinorganic Chemistry and Applications
JF - Bioinorganic Chemistry and Applications
SN - 1565-3633
M1 - 173782
ER -