Abstract
We investigated the effect of preexisting plastic deformation with the strain of 30% on the creep behavior of TP347 austenitic steel at 650. °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.
| Original language | English |
|---|---|
| Pages (from-to) | 390-399 |
| Number of pages | 10 |
| Journal | Materials Science and Engineering A |
| Volume | 654 |
| DOIs | |
| Publication status | Published - 2016 Jan 27 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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Effect of preexisting plastic deformation on the creep behavior of TP347 austenitic steel. / 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.
In: Materials Science and Engineering A, Vol. 654, 27.01.2016, p. 390-399.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effect of preexisting plastic deformation on the creep behavior of TP347 austenitic steel
AU - Hong, Sung Min
AU - Min, Dong Joon
AU - Chung, Yong keun
AU - Kim, Ju Heon
AU - Kim, Dong Ik
AU - Suh, Jin Yoo
AU - Shim, Jae Hyeok
AU - Jung, Woo Sang
AU - Choi, In Suk
PY - 2016/1/27
Y1 - 2016/1/27
N2 - We investigated the effect of preexisting plastic deformation with the strain of 30% on the creep behavior of TP347 austenitic steel at 650. °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.
AB - We investigated the effect of preexisting plastic deformation with the strain of 30% on the creep behavior of TP347 austenitic steel at 650. °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.
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U2 - 10.1016/j.msea.2015.12.051
DO - 10.1016/j.msea.2015.12.051
M3 - Article
VL - 654
SP - 390
EP - 399
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -