Effects of prestrain on high temperature impact properties of 304L stainless steel

Woei-Shyan Lee, Chi Feng Lin, Tao Hsing Chen, Meng Chieh Yang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The effects of prestrain, strain rate, and temperature on the impact properties of 304L stainless steel are investigated using a compressive split-Hopkinson pressure bar. The impact tests are performed at strain rates ranging from 2000 to 6000 s-1 and temperatures of 300, 500, and 800 °C using 304L specimens with prestrains of 0.15 or 0.5. The results show that the flow stress, work-hardening rate, and strain rate sensitivity increase with increasing strain rate or decreasing temperature. As the prestrain increases, the flow stress and strain rate sensitivity increase, but the work-hardening rate decreases. The temperature sensitivity increases with an increasing strain rate, temperature, and prestrain. Overall, the effects of prestrain on the impact properties of the tested specimens dominate those of the strain rate or temperature, respectively. Finally, optical microscopy observations reveal that the specimens fracture primarily as the result of the formation of adiabatic shear bands.

Original languageEnglish
Pages (from-to)754-763
Number of pages10
JournalJournal of Materials Research
Volume25
Issue number4
DOIs
Publication statusPublished - 2010 Apr 1

Fingerprint

Stainless Steel
strain rate
Strain rate
stainless steels
Stainless steel
work hardening
Temperature
Plastic flow
Strain hardening
temperature
impact tests
Shear bands
Optical microscopy
shear
microscopy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Lee, Woei-Shyan ; Lin, Chi Feng ; Chen, Tao Hsing ; Yang, Meng Chieh. / Effects of prestrain on high temperature impact properties of 304L stainless steel. In: Journal of Materials Research. 2010 ; Vol. 25, No. 4. pp. 754-763.
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Effects of prestrain on high temperature impact properties of 304L stainless steel. / Lee, Woei-Shyan; Lin, Chi Feng; Chen, Tao Hsing; Yang, Meng Chieh.

In: Journal of Materials Research, Vol. 25, No. 4, 01.04.2010, p. 754-763.

Research output: Contribution to journalArticle

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AB - The effects of prestrain, strain rate, and temperature on the impact properties of 304L stainless steel are investigated using a compressive split-Hopkinson pressure bar. The impact tests are performed at strain rates ranging from 2000 to 6000 s-1 and temperatures of 300, 500, and 800 °C using 304L specimens with prestrains of 0.15 or 0.5. The results show that the flow stress, work-hardening rate, and strain rate sensitivity increase with increasing strain rate or decreasing temperature. As the prestrain increases, the flow stress and strain rate sensitivity increase, but the work-hardening rate decreases. The temperature sensitivity increases with an increasing strain rate, temperature, and prestrain. Overall, the effects of prestrain on the impact properties of the tested specimens dominate those of the strain rate or temperature, respectively. Finally, optical microscopy observations reveal that the specimens fracture primarily as the result of the formation of adiabatic shear bands.

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