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Effect of preexisting plastic deformation on the creep behavior of TP347 austenitic steel

Cited 14 time in Web of Science Cited 14 time in Scopus
Authors

Hong, Sung-Min; Min, Dong-Joon; Chung, Yong-Keun; Kim, Ju-Heon; Kim, Dong-Ik; Suh, Jin-Yoo; Shim, Jae-Hyeok; Jung, Woo-Sang; Choi, In Suk

Issue Date
2016-01
Publisher
Elsevier BV
Citation
Materials Science and Engineering: A, Vol.654, pp.390-399
Abstract
We investigated the effect of preexisting plastic deformation with the strain of 30% on the creep behavior of TP347 austenitic steel at 650 degrees C with different applied stresses. The results showed that the creep rupture life of the prestrained sample increased more than that of the unstrained sample tested at 300, 250 and 200 MPa due to the strengthening of the mechanical twins induced by preexisting plastic deformation. Conversely, the prestrained samples were ruptured earlier than that of the unstrained sample tested when the lower creep stresses (150 and 125 MPa) were applied. The shorter creep rupture life of the prestrained sample was due to the reduced amount of time to a minimum creep rate and the shorter tertiary-stage creep time which can be related to the accelerated precipitation of sigma phase at the grain boundaries in the strained sample. (C) 2015 Elsevier B.V. All rights reserved.
ISSN
0921-5093
URI
https://hdl.handle.net/10371/201962
DOI
https://doi.org/10.1016/j.msea.2015.12.051
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  • College of Engineering
  • Department of Materials Science & Engineering
Research Area High Temperature Alloys, High Strength , Nano Mechanics and Nano Structure Design for Ultra Strong Materials, Shape and Pattern Design for Engineering Materials

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