Fretting fatigue damage can reduce the service life of engineering components in contact. The attachment between blades and disks in the fan and compressor stages of gas turbine engines is often a dovetail geometry. As a result, normal and tangential cyclic contact loads are present. Results of fretting fatigue tests using a new dovetail fixture are detailed here. Dovetail specimens and three types of contact pads were all machined out of Ti6A14V. Two types of palliatives are also examined: aluminum bronze coatings and low-plasticity burnishing. While the palliatives were effective in increasing the fatigue life, the three pad geometries produced essentially the same fatigue life.

1.
Hills
,
D. A.
, and
Nowell
,
D.
, 1994,
Mechanics of Fretting Fatigue
.
Kluwer Academic Publishers
, Dordrecht, The Netherlands.
2.
Hutson
,
A. L.
,
Nicholas
,
T.
, and
Goodman
,
R.
, 1999, “
Fretting Fatigue of Ti−6A1−4V Under Flat-on-Flat Contact
,”
Int. J. Fatigue
0142-1123,
21
, pp.
663
669
.
3.
Hutson
,
A. L.
,
Nicholas
,
T.
,
Olson
,
S. E.
, and
Ashbaugh
,
N. E.
, 2001, “
Effect of Sample Thickness on Local Contact Behavior in A Flat-on-Flat Fretting Fatigue Apparatus
,”
Int. J. Fatigue
0142-1123,
23
, Supp. 1, pp.
445
453
.
4.
Ruiz
,
C.
,
Boddington
,
P. H. B.
, and
Chen
,
K. C.
, 1984, “
An Investigation of Fatigue and Fretting in a Dovetail joint
,”
Exp. Mech.
0014-4851,
24
, pp.
208
217
.
5.
Ruiz
,
C.
, and
Chen
,
K. C.
, 1986, “
Life Assessment of Dovetail Joints Between Blades and Discs in Aero-engines
,”
Proceedings of the International Conference on Fatigue
, Sheffield, UK, Institute of Mechanical Engineers (IMechE), London, UK.
6.
Ruiz
,
C.
, and
Nowell
,
D.
, 2000, “
Designing Against Fretting Fatigue in Aeroengines
,”
M.
Fuentes
,
M.
Elices
,
A.
Martín-Meizoso
,
J.-M.
Martínez-Esnaola
, eds.,
Fracture Mechanics: Applications and Challenges
, ECF 13. ESIS Publication 26, New York, ESIS,
Elsevier
, pp.
73
95
.
7.
Wittkosky
,
B. U.
,
Birch
,
P. R.
,
Dominguez
,
J.
, and
Suresh
,
S.
, 1999, “
An Apparatus for Quantitative Fretting Fatigue Testing
,”
Fatigue Fract. Eng. Mater. Struct.
8756-758X,
22
(
4
), pp.
307
320
.
8.
Stodola
,
A.
, 1927,
Steam and Gas Turbines
.
McGraw-Hill
, New York.
9.
Koul
,
A. K.
,
Xue
,
L.
,
Wallace
,
W.
,
Bibby
,
M.
,
Chakravarty
,
S.
,
Andrews
,
R. G.
, and
Patnaik
,
P. C.
, 1996, “
An Investigation on Surface Treatments for Improving the Fretting Fatigue Resistance of Titanium Alloys
,”
82nd Meeting of the AGARD Structures and Materials Panel
,
Sesimbra
, Portugal, AGARD, Paris, France.
10.
Kirkpatrick
,
G. W.
, 1999, “
Fretting Fatigue Analysis and Palliatives
,” Master’s thesis,
Massachusetts Institute of Technology
, Cambridge, MA.
11.
Peters
,
J. O.
,
Roder
,
O.
,
Boyce
,
B. L.
,
Thompson
,
A. W.
, and
Ritchie
,
R. O.
, 2000, “
Role of Foreign Object Damage on Thresholds for High Cycle Fatigue in Ti−6A1−4V
,”
Metall. Mater. Trans. A
1073-5623,
31A
, pp.
1571
1583
.
12.
Gallagher
,
J. P.
,
van Stone
,
R. H.
,
deLanuevuille
,
R. E.
,
Gravett
,
P.
,
Bellows
,
R. S.
,
et al.
, “
Improved High Cycle Fatigue Life Prediction
,” Report #AFRL-ML-WP-TR-2001-4159,
University of Dayton Research Institute
, Dayton, OH, Jan., 2001 (on CD ROM).
13.
Maxwell
,
D. C.
, and
Nicholas
,
T.
, 1999, “
A Rapid Method for Generation of a Haigh Diagram for High Cycle Fatigue
,”
T. L.
Panontin
and
S. D.
Sheppard
, eds.,
Fatigue and Fracture Mechanics
,
ASTM STP 1321
, vol.
29
,
American Society for Testing and Materials
, West Conshohocken, PA, pp.
626
641
.
14.
Hutson
,
A. L.
, and
Nicholas
,
T.
, 2000, “
Fretting Fatigue Behavior of Ti−6A1−4V Against Ti−6A1−4V Under Flat-on-Flat Contact with Blending Radii
,”
D. W.
Hoeppner
,
V.
Chandrasekaran
, and
C. B.
Elliott
III
, eds.,
Fretting Fatigue: Current Technology and Practices
,
ASTM STP 1367
, pages
308
321
.
American Society for Testing and Materials
, West Conshohocken, Pennsylvania, 2000.
15.
Golden
,
P. J.
, and
Nicholas
,
T.
, 2005, “
The Effect of Angle on Dovetail Fretting Experiments in Ti−6A1−4V
,”
Fatigue Fract. Eng. Mater. Struct.
8756-758X,
28
, pp.
1169
1175
.
16.
Praxair Surface Technologies
, 1999, “Coating Datasheet, LCU-2” Indianapolis, IN.
17.
Hertz
,
H.
, 1882, “
On the Contact of Elastic Solids
,”
J. Reine Angew. Math.
0075-4102
92
, pp.
156
171
.
18.
Kim
,
A. S.
Suresh
,
S.
, and
Shih
,
C. F.
, 1997, “
Fracture Normal to Interfaces with Homogeneous and Graded Compositions
,”
Int. J. Solids Struct.
0020-7683
34
, pp.
3415
32
.
19.
Begley
,
M R.
.
, and
Hutchinson
,
J. W.
, 1999, “
Plasticity in Fretting of Coated Substrates
,”
Eng. Fract. Mech.
0013-7944,
62
(
2-3
), pp.
145
164
.
20.
Lindley
,
T. C.
, and
Nix
,
K. J.
, 1992, “
Fretting Fatigue in the Power Generation Industry
,”
M. H.
Attia
and
R. B.
Waterhouse
, eds.,
Standardization of Fretting Fatigue Test Methods and Equipment
,
American Society for Testing and Materials
, Philadelphia, pp.
153
169
.
21.
Waterhouse
,
R. B.
, 1987, “
Residual Stresses and Fretting-Crack Initiation and Propagation
,”
Advances in Surface Treatment-Technology, Applications, Effects
, Pergamon, Oxford, Vol. 4 Residual Stresses, p.
517
.
22.
Nicholas
,
T.
,
Hutson
,
A.
,
John
,
R.
, and
Olson
,
S.
, “A Fracture Mechanics Methodology Assessment for Fretting Fatigue,”
Int. J. Fatigue
0142-1123,
25
, 2003, pp.
1069
1077
.
23.
Tada
,
H.
,
Paris
,
P. C.
, and
Irwin
,
G. R.
, 1973,
Stress Analysis of Cracks Handbook
,
Del Research Corporation
, Hellertown, PA.
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