Internal strains between grains during creep deformation of an austenitic stainless steel

Bo Chen; J. N. Hu; Y. Q. Wang; S. Kabra; A. C. F. Cocks; D. J. Smith; P. E. J. Flewitt

doi:10.1007/s10853-015-9128-4

Internal strains between grains during creep deformation of an austenitic stainless steel

Bo Chen, J. N. Hu, Y. Q. Wang, S. Kabra, A. C. F. Cocks, D. J. Smith, P. E. J. Flewitt

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Abstract

Internal strains that develop between grains during creep of an austenitic stainless steel were measured using in situ neutron diffraction. The secondary creep pre-strained test specimens were considered. Measurements were undertaken before, during and post creep deformation at 550 °C. There was no measurable change of internal strains between grains during in situ creep for 4 h at 550 °C. In addition, the effect of increasing/reducing temperatures in a range from 470 to 550 °C on the internal strains was measured and interpreted with respect to contributions from thermal expansion/contraction. No further internal misfit strains between grains were created when specimen crept during the dwell time at 530, 510, 490 and 470 °C. Results are discussed with respect to (i) the general structure of self-consistent models and (ii) the optimised use of neutron sources for creep studies.

Original language	English
Pages (from-to)	5809-5816
Journal	Journal of Materials Science
Volume	50
Issue number	17
Early online date	3 Jun 2015
DOIs	https://doi.org/10.1007/s10853-015-9128-4
Publication status	Published - Sept 2015

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The final publication is available at Springer via http://dx.doi.org/10.1007/s10853-015-9128-4 .

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title = "Internal strains between grains during creep deformation of an austenitic stainless steel",

abstract = "Internal strains that develop between grains during creep of an austenitic stainless steel were measured using in situ neutron diffraction. The secondary creep pre-strained test specimens were considered. Measurements were undertaken before, during and post creep deformation at 550 °C. There was no measurable change of internal strains between grains during in situ creep for 4 h at 550 °C. In addition, the effect of increasing/reducing temperatures in a range from 470 to 550 °C on the internal strains was measured and interpreted with respect to contributions from thermal expansion/contraction. No further internal misfit strains between grains were created when specimen crept during the dwell time at 530, 510, 490 and 470 °C. Results are discussed with respect to (i) the general structure of self-consistent models and (ii) the optimised use of neutron sources for creep studies. ",

author = "Bo Chen and Hu, {J. N.} and Wang, {Y. Q.} and S. Kabra and Cocks, {A. C. F.} and Smith, {D. J.} and Flewitt, {P. E. J.}",

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TY - JOUR

T1 - Internal strains between grains during creep deformation of an austenitic stainless steel

AU - Chen, Bo

AU - Hu, J. N.

AU - Wang, Y. Q.

AU - Kabra, S.

AU - Cocks, A. C. F.

AU - Smith, D. J.

AU - Flewitt, P. E. J.

N1 - The final publication is available at Springer via http://dx.doi.org/10.1007/s10853-015-9128-4 .

PY - 2015/9

Y1 - 2015/9

N2 - Internal strains that develop between grains during creep of an austenitic stainless steel were measured using in situ neutron diffraction. The secondary creep pre-strained test specimens were considered. Measurements were undertaken before, during and post creep deformation at 550 °C. There was no measurable change of internal strains between grains during in situ creep for 4 h at 550 °C. In addition, the effect of increasing/reducing temperatures in a range from 470 to 550 °C on the internal strains was measured and interpreted with respect to contributions from thermal expansion/contraction. No further internal misfit strains between grains were created when specimen crept during the dwell time at 530, 510, 490 and 470 °C. Results are discussed with respect to (i) the general structure of self-consistent models and (ii) the optimised use of neutron sources for creep studies.

AB - Internal strains that develop between grains during creep of an austenitic stainless steel were measured using in situ neutron diffraction. The secondary creep pre-strained test specimens were considered. Measurements were undertaken before, during and post creep deformation at 550 °C. There was no measurable change of internal strains between grains during in situ creep for 4 h at 550 °C. In addition, the effect of increasing/reducing temperatures in a range from 470 to 550 °C on the internal strains was measured and interpreted with respect to contributions from thermal expansion/contraction. No further internal misfit strains between grains were created when specimen crept during the dwell time at 530, 510, 490 and 470 °C. Results are discussed with respect to (i) the general structure of self-consistent models and (ii) the optimised use of neutron sources for creep studies.

U2 - 10.1007/s10853-015-9128-4

DO - 10.1007/s10853-015-9128-4

M3 - Article

SN - 0022-2461

SN - 1573-4803

VL - 50

SP - 5809

EP - 5816

JO - Journal of Materials Science

JF - Journal of Materials Science

IS - 17

ER -

Internal strains between grains during creep deformation of an austenitic stainless steel

Abstract

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