Dynamic mechanical response of biomedical 316L stainless steel as function of strain rate and temperature

Woei Shyan Lee, Tao Hsing Chen, Chi Feng Lin, Wen Zhen Luo

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number173782
JournalBioinorganic Chemistry and Applications
Volume2011
DOIs
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Organic Chemistry
  • Inorganic Chemistry

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