Effect of strain paths and residual delta ferrite on the failure of cold rolled austenitic stainless steels, type 304L
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Date
2013-03-15
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SAGE
Abstract
The effects of martensite development on lattice strain evolution during the in situ compression of austenitic stainless steels, Type 304L, at ambient and cryogenic temperatures were investigated. Engin-X neutron diffractometer was used to study the change in the lattice strain during the uniaxial compression to 10% strain in situ. The report found no evidence of martensite during the compression test at ambient temperature. Similarly, no martensite was observed at cryogenic temperatures up to the applied load of 200MPa in the elastic region. Martensite was only observed during the plastic deformation at cryogenic temperatures up to the applied strain of 10%. The presence of martensite in the austenitic stainless steels microstructure reinforces the austenite matrix. This was evident from the decrease in the lattice strain as the deformation temperature decreases.
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Keywords
In situ, deformation, cryogenic, martensite, lattice strain
Citation
Ahmed, I. I., da Fonseca, J. Q., & Sherry, A. H. (2013). Effects of martensite development on lattice strain evolution during the in situ deformation of austenitic stainless steels at cryogenic temperatures. The Journal of Strain Analysis for Engineering Design, 48 (5), 306-312. doi: http://dx.doi.org/10.1177/0309324713486628