Journal
RESULTS IN PHYSICS
Volume 11, Issue -, Pages 377-384Publisher
ELSEVIER
DOI: 10.1016/j.rinp.2018.06.023
Keywords
Nanoindentation; Duplex stainless steel; Microstructure; Stress-strain curves; FEM
Funding
- National Natural Science Foundation of China [51505477]
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The stress-strain behavior of ferrite and austenite in a commercial 2205 duplex stainless steel was investigated by using nanoindentation test and microstructure-based finite element method (FEM). Results showed that the optimum load range for measuring phase properties in nanoindentation test was from 3000 mu N to 7000 mu N. The ferrite has slightly higher average elastic modulus than austenite, while austenite has higher average nano-hardness than ferrite. Representative stress-strain curves of ferrite and austenite were determined by means of the power-law hardening and empirical relationship. Based on FEM, the differences in distribution and portion of stress-strain in local phases were visualized, and the overall flow curve of the sample 2205 was extracted, which was in good agreement with the obtained results from uniaxial tensile experiment.
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