TY - JOUR
T1 - Damage nucleation during transverse creep of a directionally solidified Ni-based superalloy
AU - Stinville, Jean Charles
AU - Mataveli Suave, Lorena
AU - Mauget, Florent
AU - Marcin, Lionel
AU - Villechaise, Patrick
AU - Pollock, Tresa M.
AU - Cormier, Jonathan
N1 - Funding Information:
Safran (Safran SA and Safran Aircraft Engines) is gratefully acknowledged for providing DS200 plates and Mar-M200 SX bars, for financial support and for L.M.S. doctoral grant, USA . Pr. Georges Cailletaud (Mines ParisTech), Dr. Florent Coudon (SAFRAN Tech) and Dr. Denis Bertheau (Institut Pprime) are acknowledged for the scientific discussions and their relevant suggestions. TMP is grateful for the support of a Vannevar Bush DoD Faculty Fellowship, ONR, USA Grant N00014-18-1-3031 . J.C.S. is grateful for financial support from startup funds provided by the Department of Materials Science and Engineering at University of Illinois at Urbana-Champaign, USA and from the Energy & Biosciences Institute (EBI), USA through the EBI-Shell Program.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/11/14
Y1 - 2022/11/14
N2 - A directionally solidified Ni-based superalloy DS200 is investigated under low (750 °C) and high temperature (900 °C) transverse creep. In-situ creep tests with strain measurements are performed to capture creep strain evolution in the individual crystallographic grains. Moreover, the microstructure configurations that promote damage nucleation are identified as a function of the loading condition. High angle grain boundaries are the preferred sites for crack nucleation under all investigated loading conditions. However, grain boundary configurations promoting crack nucleation are observed to significantly differ as a function of the loading conditions. Such observations are discussed in view of creep behavior and damage processes.
AB - A directionally solidified Ni-based superalloy DS200 is investigated under low (750 °C) and high temperature (900 °C) transverse creep. In-situ creep tests with strain measurements are performed to capture creep strain evolution in the individual crystallographic grains. Moreover, the microstructure configurations that promote damage nucleation are identified as a function of the loading condition. High angle grain boundaries are the preferred sites for crack nucleation under all investigated loading conditions. However, grain boundary configurations promoting crack nucleation are observed to significantly differ as a function of the loading conditions. Such observations are discussed in view of creep behavior and damage processes.
KW - Crack nucleation
KW - DS200
KW - Directionally solidified Ni-based superalloy
KW - GTD444
KW - Transverse creep
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U2 - 10.1016/j.msea.2022.144089
DO - 10.1016/j.msea.2022.144089
M3 - Article
AN - SCOPUS:85139596394
VL - 858
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
M1 - 144089
ER -