This paper presents the high-temperature low-cycle fatigue (HTLCF) behavior of a precipitate strengthened 9Cr martensitic steel, MarBN, designed to provide enhanced creep strength and precipitate stability at high temperature. The strain-controlled test program addresses the cyclic effects of strain-rate and strain-range at 600 °C, as well as tensile stress-relaxation response. A recently developed unified cyclic viscoplastic material model is implemented to characterize the complex cyclic and relaxation plasticity response, including cyclic softening and kinematic hardening effects. The measured response is compared to that of P91 steel, a current power plant material, and shows enhanced cyclic strength relative to P91.

References

References
1.
Abe
,
F.
,
Taneike
,
M.
, and
Sawada
,
K.
,
2007
, “
Alloy Design of Creep Resistant 9Cr Steel Using a Dispersion of Nano-Sized Carbonitrides
,”
Int. J. Pressure Vessels Piping
,
84
(
1
), pp.
3
12
.
2.
Abe
,
F.
,
Tabuchi
,
M.
,
Semba
,
H.
,
Igarashi
,
M.
,
Yoshizawa
,
M.
,
Komai
,
N.
, and
Fujita
,
A.
,
2007
, “
Feasibility of MARBN Steel for Application to Thick Section Boiler Components in USC Power Plant at 650 °C
,”
5th International Conference on Advances in Materials Technology for Fossil Power Plants
, Marco Island, FL, Oct. 3-5, pp. 92-106.
3.
Barrett
,
R. A.
,
O'Donoghue
,
P. E.
, and
Leen
,
S. B.
,
2013
, “
An Improved Unified Viscoplastic Constitutive Model for Strain-Rate Sensitivity in High Temperature Fatigue
,”
Int. J. Fatigue
,
48
, pp.
192
204
.
4.
Abe
,
F.
,
Tabuchi
,
M.
,
Kondo
,
M.
, and
Tsukamoto
,
S.
,
2007
, “
Suppression of Type IV Fracture and Improvement of Creep Strength of 9Cr Steel Welded Joints by Boron Addition
,”
Int. J. Pressure Vessels Piping
,
84
(
1
), pp.
44
52
.
5.
Abe
,
F.
,
Tabuchi
,
M.
,
Tsukamoto
,
S.
, and
Shirane
,
T.
,
2010
, “
Microstructure Evolution in HAZ and Suppression of Type IV Fracture in Advanced Ferritic Power Plant Steels
,”
Int. J. Pressure Vessels Piping
,
87
(
11
), pp.
598
604
.
6.
Albert
,
S. K.
,
Kondo
,
M.
,
Tabuchi
,
M.
,
Yin
,
F.
,
Sawada
,
K.
, and
Abe
,
F.
,
2005
, “
Improving the Creep Properties of 9Cr-3W-3Co-NbV Steels and Their Weld Joints by the Addition of Boron
,”
Metall. Mater. Trans. A
,
36
(
2
), pp.
333
343
.
7.
Barrett
,
R.
,
Farragher
,
T.
,
Hyde
,
C.
,
O'Dowd
,
N.
,
O'Donoghue
,
P.
, and
Leen
,
S.
,
2014
, “
A Unified Viscoplastic Model for High Temperature Low Cycle Fatigue of Service-Aged P91 Steel
,”
ASME J. Pressure Vessel Technol.
,
136
(
2
), p.
021402
.
8.
Li
,
L.
,
MacLachlan
,
R.
,
Jepson
,
M. A.
, and
Thomson
,
R.
,
2013
, “
Microstructural Evolution of Boron Nitride Particles in Advanced 9Cr Power Plant Steels
,”
Metall. Mater. Trans. A
,
44
(
7
), pp.
3411
3418
.
9.
Farragher
,
T.
,
Scully
,
S.
,
O'Dowd
,
N.
,
Hyde
,
C.
, and
Leen
,
S.
,
2014
, “
High Temperature, Low Cycle Fatigue Characterization of P91 Weld and Heat Affected Zone Material
,”
ASME J. Pressure Vessel Technol.
,
136
(
2
), p.
021403
.
10.
Saad
,
A. A.
,
2012
,
Cyclic Plasticity and Creep of Power Plant Materials
, Ph.D. thesis,
University of Nottingham
,
Nottingham, UK
.
11.
Saad
,
A. A.
,
Sun
,
W.
,
Hyde
,
T. H.
, and
Tanner
,
D. W. J.
,
2011
, “
Cyclic Softening Behaviour of a P91 Steel Under Low Cycle Fatigue at High Temperature
,”
Proc. Eng.
,
10
, pp.
1103
1108
.
12.
Saad
,
A.
,
Hyde
,
C.
,
Sun
,
W.
, and
Hyde
,
T.
,
2011
, “
Thermal-Mechanical Fatigue Simulation of a P91 Steel in a Temperature Range of 400–600 °C
,”
Mater. High Temp.
,
28
(
3
), pp.
212
218
.
13.
Chaboche
,
J.-L.
, and
Rousselier
,
G.
,
1983
, “
On the Plastic and Viscoplastic Constitutive Equations—Part II: Application of Internal Variable Concepts to the 316 Stainless Steel
,”
ASME J. Pressure Vessel Technol.
,
105
(
2
), pp.
159
164
.
14.
Chaboche
,
J.
, and
Rousselier
,
G.
,
1983
, “
On the Plastic and Viscoplastic Constitutive Equations—Part I: Rules Developed With Internal Variable Concept
,”
ASME J. Pressure Vessel Technol.
,
105
(
2
), pp.
153
158
.
15.
Saad
,
A. A.
,
Hyde
,
C. J.
,
Sun
,
W.
, and
Hyde
,
T. H.
,
2011
, “
Thermal-Mechanical Fatigue Simulation of a P91 Steel in a Temperature Range of 400–600 °C
,”
Mater. High Temp.
,
28
(
3
), pp.
212
218
.
16.
Frederick
,
C. O.
, and
Armstrong
,
P.
,
2007
, “
A Mathematical Representation of the Multiaxial Bauschinger Effect
,”
Mater. High Temp.
,
24
(
1
), pp.
1
26
.
17.
Barrett
,
R.
,
Farragher
,
T.
,
O'Dowd
,
N.
,
O'Donoghue
,
P.
, and
Leen
,
S.
,
2014
, “
Multiaxial Cyclic Viscoplasticity Model for High Temperature Fatigue of P91 Steel
,”
Mater. Sci. Technol.
,
30
(
1
), pp.
67
74
.
18.
Hyde
,
C.
,
Sun
,
W.
, and
Leen
,
S.
,
2010
, “
Cyclic Thermo-Mechanical Material Modelling and Testing of 316 Stainless Steel
,”
Int. J. Pressure Vessels Piping
,
87
(
6
), pp.
365
372
.
19.
Zhan
,
Z.
,
2004
,
A Study of Creep-Fatigue Interaction in a New Nickle-Based Superalloy
,
University of Portsmouth
,
Portsmouth, UK
.
20.
Maruyama
,
K.
,
Sawada
,
K.
, and
Koike
,
J.-I.
,
2001
, “
Strengthening Mechanisms of Creep Resistant Tempered Martensitic Steel
,”
ISIJ Int.
,
41
(
6
), pp.
641
653
.
21.
Williams
,
J.
, and
Fatemi
,
A.
,
2007
, “
Fatigue Performance of Forged Steel and Ductile Cast Iron Crankshafts
,”
SAE
Technical Paper 2007-01-1001.
22.
Tabuchi
,
M.
,
Kondo
,
M.
,
Kubo
,
K.
, and
Albert
,
S. K.
,
2004
, “
Improvement of Type IV Creep Cracking Resistance of 9Cr Heat Resisting Steels by Boron Addition
,”
OMNI
,
3
(
3
), pp.
1
11
.
23.
Abe
,
F.
,
2008
, “
Precipitate Design for Creep Strengthening of 9% Cr Tempered Martensitic Steel for Ultra-Supercritical Power Plants
,”
Sci. Technol. Adv. Mater.
,
9
(
1
), p.
013002
.
24.
Sakuraya
,
K.
,
Okada
,
H.
, and
Abe
,
F.
,
2006
, “
BN Type Inclusions Formed in High Cr Ferritic Heat Resistant Steel
,”
Energy Mater.
,
1
(
3
), pp.
158
166
.
25.
Sauzay
,
M.
,
Brillet
,
H.
,
Monnet
,
I.
,
Mottot
,
M.
,
Barcelo
,
F.
,
Fournier
,
B.
, and
Pineau
,
A.
,
2005
, “
Cyclically Induced Softening Due to Low-Angle Boundary Annihilation in a Martensitic Steel
,”
Mater. Sci. Eng. A
,
400
, pp.
241
244
.
26.
Sauzay
,
M.
,
Fournier
,
B.
,
Mottot
,
M.
,
Pineau
,
A.
, and
Monnet
,
I.
,
2008
, “
Cyclic Softening of Martensitic Steels at High Temperature—Experiments and Physically Based Modelling
,”
Mater. Sci. Eng. A
,
483–484
, pp.
410
414
.
27.
Farragher
,
T. P.
,
Scully
,
S.
,
O'Dowd
,
N. P.
, and
Leen
,
S. B.
,
2013
, “
Development of Life Assessment Procedures for Power Plant Headers Operated Under Flexible Loading Scenarios
,”
Int. J. Fatigue
,
49
, pp.
50
61
.
28.
Barrett
,
R. A.
,
O'Donoghue
,
P. E.
, and
Leen
,
S. B.
,
2014
, “
A Dislocation-Based Model for High Temperature Cyclic Viscoplasticity of 9–12Cr Steels
,”
Comput. Mater. Sci.
,
92
, pp.
286
297
.
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