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Fatigue behavior of rolled and forged tungsten at 25 degrees, 280 degrees and 480 degrees C

Habainy, Jemila LU ; Iyengar, Srinivasan LU ; Lee, Yong Joong LU and Dai, Y. (2015) In Journal of Nuclear Materials 465. p.438-447
Abstract
Pure tungsten has been chosen as the target material at the European Spallation Source facility in Lund. Calculations show that the target temperature can reach 500 degrees C momentarily during the spallation process, leading to thermal fatigue. Target life estimations require fatigue data at different temperatures and this work focuses on generating such data for pure, unirradiated, rolled and forged tungsten in the range 25 degrees-480 degrees C. For specimens oriented in the rolling direction, tensile tests at room temperature indicated Young's modulus values in the range 320-390 GPa, low levels of plasticity (<0.23%) and UTS values in the range 397 MPa (unpolished) and 705 MPa (Polished). UTS for forged specimens were around 500... (More)
Pure tungsten has been chosen as the target material at the European Spallation Source facility in Lund. Calculations show that the target temperature can reach 500 degrees C momentarily during the spallation process, leading to thermal fatigue. Target life estimations require fatigue data at different temperatures and this work focuses on generating such data for pure, unirradiated, rolled and forged tungsten in the range 25 degrees-480 degrees C. For specimens oriented in the rolling direction, tensile tests at room temperature indicated Young's modulus values in the range 320-390 GPa, low levels of plasticity (<0.23%) and UTS values in the range 397 MPa (unpolished) and 705 MPa (Polished). UTS for forged specimens were around 500 MPa. Stress-controlled fatigue tests were conducted in the tensile regime, with a runout limit of 2 x 10(6) cycles. At 25 degrees C, unpolished specimens had fatigue limits of 150 MPa (rolling and transverse direction), and 175 MPa (forged). For polished specimens in the rolling direction, fatigue limits were higher at 237.5 MPa (25 degrees C) and 252.5 MPa (280 degrees C). The forged specimens showed slightly better fatigue properties and marginal cyclic hardening at 480 degrees C. (C) 2015 Elsevier B.V. All rights reserved. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Fatigue properties, Tungsten target, Spallation source
in
Journal of Nuclear Materials
volume
465
pages
438 - 447
publisher
Elsevier
external identifiers
  • wos:000364890300055
  • scopus:84933567252
ISSN
0022-3115
DOI
10.1016/j.jnucmat.2015.06.032
language
English
LU publication?
yes
id
c26aa172-52e3-43a0-a384-224d816e09fc (old id 8539768)
date added to LUP
2016-01-20 11:32:15
date last changed
2017-11-19 03:18:34
@article{c26aa172-52e3-43a0-a384-224d816e09fc,
  abstract     = {Pure tungsten has been chosen as the target material at the European Spallation Source facility in Lund. Calculations show that the target temperature can reach 500 degrees C momentarily during the spallation process, leading to thermal fatigue. Target life estimations require fatigue data at different temperatures and this work focuses on generating such data for pure, unirradiated, rolled and forged tungsten in the range 25 degrees-480 degrees C. For specimens oriented in the rolling direction, tensile tests at room temperature indicated Young's modulus values in the range 320-390 GPa, low levels of plasticity (&lt;0.23%) and UTS values in the range 397 MPa (unpolished) and 705 MPa (Polished). UTS for forged specimens were around 500 MPa. Stress-controlled fatigue tests were conducted in the tensile regime, with a runout limit of 2 x 10(6) cycles. At 25 degrees C, unpolished specimens had fatigue limits of 150 MPa (rolling and transverse direction), and 175 MPa (forged). For polished specimens in the rolling direction, fatigue limits were higher at 237.5 MPa (25 degrees C) and 252.5 MPa (280 degrees C). The forged specimens showed slightly better fatigue properties and marginal cyclic hardening at 480 degrees C. (C) 2015 Elsevier B.V. All rights reserved.},
  author       = {Habainy, Jemila and Iyengar, Srinivasan and Lee, Yong Joong and Dai, Y.},
  issn         = {0022-3115},
  keyword      = {Fatigue properties,Tungsten target,Spallation source},
  language     = {eng},
  pages        = {438--447},
  publisher    = {Elsevier},
  series       = {Journal of Nuclear Materials},
  title        = {Fatigue behavior of rolled and forged tungsten at 25 degrees, 280 degrees and 480 degrees C},
  url          = {http://dx.doi.org/10.1016/j.jnucmat.2015.06.032},
  volume       = {465},
  year         = {2015},
}