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

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

doi:10.1016/j.msea.2015.12.051

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

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article

8 Citations (Scopus)

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	https://doi.org/10.1016/j.msea.2015.12.051
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

Cite this

Hong, S. M., Min, D. J., Chung, Y. K., Kim, J. H., Kim, D. I., Suh, J. Y., Shim, J. H., Jung, W. S., & Choi, I. S. (2016). Effect of preexisting plastic deformation on the creep behavior of TP347 austenitic steel. Materials Science and Engineering A, 654, 390-399. https://doi.org/10.1016/j.msea.2015.12.051

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title = "Effect of preexisting plastic deformation on the creep behavior of TP347 austenitic steel",

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.",

author = "Hong, {Sung Min} and Min, {Dong Joon} and Chung, {Yong keun} and Kim, {Ju Heon} and Kim, {Dong Ik} and Suh, {Jin Yoo} and Shim, {Jae Hyeok} and Jung, {Woo Sang} and Choi, {In Suk}",

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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

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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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10.1016/j.msea.2015.12.051