Fatigue behavior of innovative alloys at elevated temperature
Research output: Contribution to journal › Conference article › Scientific › peer-review
Standard
Fatigue behavior of innovative alloys at elevated temperature. / Berto, F.; Gallo, P.; Razavi, S.M.J.; Ayatollahi, M. R.
In: Procedia Structural Integrity, Vol. 3, 2017, p. 162-167.Research output: Contribution to journal › Conference article › Scientific › peer-review
Harvard
APA
Vancouver
Author
Bibtex - Download
}
RIS - Download
TY - JOUR
T1 - Fatigue behavior of innovative alloys at elevated temperature
AU - Berto, F.
AU - Gallo, P.
AU - Razavi, S.M.J.
AU - Ayatollahi, M. R.
PY - 2017
Y1 - 2017
N2 - The present paper summarizes the results from uniaxial-tension stress-controlled fatigue tests performed at different temperatures up to 650 degrees C on Cu-Be and 40CrMoV13.9 specimens. Two geometries are considered: hourglass shaped (both materials), plates weakened by a central hole (Cu-Be alloy). The motivation of the present work is that, at the best of authors' knowledge, only a limited number of works on these alloys under high-temperature fatigue are available in the literature and no results deal with notched components. In the present contribution, after a brief review of the recent papers, material properties and experimental procedure are described. The new data from un-notched and notched specimens are summarized in the corresponding fatigue curves. The Cu-Be specimens fatigue data are re-analysed in terms of the mean value of the Strain Energy Density (SED). The approach, successfully used by the same authors to summarise fatigue data from notched specimens made of different materials tested at room temperature, is extended here for the first time to high-temperature fatigue. In the plates with central holes the SED is evaluated over a finite size control volume surrounding the highly stressed zone at the hole edge. A value of the radius equal to 0.6 mm seems to be appropriate to summarize all fatigue data in a quite narrow scatter-band Thanks to the SED approach it is possible to summarise in a single scatter-band all the fatigue data, independent of the specimen geometry. Copyright (C) 2017 The Authors. Published by Elsevier B.V.
AB - The present paper summarizes the results from uniaxial-tension stress-controlled fatigue tests performed at different temperatures up to 650 degrees C on Cu-Be and 40CrMoV13.9 specimens. Two geometries are considered: hourglass shaped (both materials), plates weakened by a central hole (Cu-Be alloy). The motivation of the present work is that, at the best of authors' knowledge, only a limited number of works on these alloys under high-temperature fatigue are available in the literature and no results deal with notched components. In the present contribution, after a brief review of the recent papers, material properties and experimental procedure are described. The new data from un-notched and notched specimens are summarized in the corresponding fatigue curves. The Cu-Be specimens fatigue data are re-analysed in terms of the mean value of the Strain Energy Density (SED). The approach, successfully used by the same authors to summarise fatigue data from notched specimens made of different materials tested at room temperature, is extended here for the first time to high-temperature fatigue. In the plates with central holes the SED is evaluated over a finite size control volume surrounding the highly stressed zone at the hole edge. A value of the radius equal to 0.6 mm seems to be appropriate to summarize all fatigue data in a quite narrow scatter-band Thanks to the SED approach it is possible to summarise in a single scatter-band all the fatigue data, independent of the specimen geometry. Copyright (C) 2017 The Authors. Published by Elsevier B.V.
KW - high-temperature fatigue
KW - copper-cobalt-beryllium alloy
KW - fatigue strength
KW - notched specimens
KW - 40CrMoV
KW - FERRITIC STAINLESS-STEEL
KW - LOW-CYCLE FATIGUE
KW - STRAIN-ENERGY
KW - VOLUME
KW - CREEP
KW - STRENGTH
KW - NOTCHES
KW - COPPER
U2 - 10.1016/j.prostr.2017.04.029
DO - 10.1016/j.prostr.2017.04.029
M3 - Conference article
VL - 3
SP - 162
EP - 167
JO - Procedia Structural Integrity
JF - Procedia Structural Integrity
SN - 2452-3216
ER -
ID: 17304443