A localized inhomogeneous cyclic plastic deformation phenomenon was experimentally investigated in a mild steel. Small strain gages were utilized to characterize the local deformation within the gage section and the gross deformation was measured with an extensometer. Both fully reversed symmetrical loading and asymmetrical loading with a mean stress were used in the cyclic experiments. Plastic deformation was initiated in local areas of the specimen and it propagated into the whole gage section in the specimen with increasing cyclic loading. The local inhomogeneous cyclic deformation was dependent on the loading magnitude and evolved with continued cyclic loading.

1.
Hall, E. O., 1970, Yield Point Phenomena in Metals and Alloys, Plenum Press, New York.
2.
Ananthan
,
V. S.
, and
Hall
,
E. O.
,
1987
, “
Surface Features of Microscopic Shear Bands at Lu¨ders Fronts in Mild Steel
,”
Scr. Metall.
,
21
, pp.
1699
1704
.
3.
Ananthan
,
V. S.
, and
Hall
,
E. O.
,
1989
, “
Shear and Kink Angles at the Lu¨ders band Front
,”
Scr. Metall.
,
23
, pp.
1075
1078
.
4.
Ananthan
,
V. S.
, and
Hall
,
E. O.
,
1991
, “
Macroscopic Aspects of Lu¨ders Band Deformation in Mild Steel
,”
Acta Metall. Mater.
,
39
, pp.
3153
3160
.
5.
Brechet
,
Y.
,
Canova
,
G.
, and
Kubin
,
L. P.
,
1996
, “
Strain Softening, Slip Localization and Propagation: From Simulations to Continuum Modeling
,”
Acta Mater.
,
44
, pp.
4261
4271
.
6.
Gonzalez-Doncel
,
G.
,
Adeva
,
P.
,
Cristina
,
C.
, and
Ibanez
,
J.
,
1995
, “
Lu¨ders Bands Formation in a Rapidly Solidified Ni3Al Alloy Ribbon
,”
Acta Metall. Mater.
,
43
, pp.
4281
4287
.
7.
Tata
,
M. M.
,
Oh
,
J. S.
, and
Lee
,
D.
,
1998
, “
The Nature of Localized Deformation in 6111-T6 Aluminium Alloy and Polycarbonate
,”
J. Mater. Sci.
,
33
, pp.
2781
2794
.
8.
Shaw
,
J. A.
, and
Kyriakides
,
1997
, “
On the Nucleation and Propagation of Phase Transformation Fronts in a NiTi Alloy
,”
Acta Mater.
,
45
, pp.
683
700
.
9.
Fatemi, A., and Stephens, R. I., 1989, “Cyclic Deformation of 1045 Steel under In-Phase and 90 Deg Out-of-Phase Axial-Torsional Loading Conditions,” Multiaxial Fatigue, Analysis and Experiments, AE-14, Chapter 10, G. E. Leese and D. Socie, eds., SAE International, pp. 139–147.
10.
Jiang, Y., 1999, Unpublished Experimental Results.
11.
Finney
,
J. M.
, and
Laird
,
C.
,
1975
, “
Strain Localization in Cyclic Deformation of Copper Single Crystals
,”
Philos. Mag.
, Eighth Series,
31
, pp.
339
366
.
12.
Eifler, D., and Macherauch, E., 1983, “Inhomogeneous Work-Softening during Cyclic Loading of SAE 4140 in Different Heat Treated States,” Proceedings of the 2nd International Symposium on Defects, Fracture and Fatigue, Mont Gabriel, Que, Can Martinus Nijhoff Publ The Hague, Neth, pp. 171–182.
13.
Kocks, U. F., 1981, “Kinetics of Nonuniform Deformation,” Progress in Materials Science, J. W. Christian, P. Haasen, and T. B. Massalski, eds., Chalmers Anniversary Volume, Pergamon Press, pp. 185–241.
14.
Jiang
,
Y.
, and
Kurath
,
P.
,
1997
, “
An Investigation of Cyclic Transient Behavior and Implications on Fatigue Life Estimates
,”
ASME J. Eng. Mater. Technol.
,
119
, pp.
161
170
.
15.
Jiang
,
Y.
, and
Sehitoglu
,
H.
,
1998
, “
A Model for Rolling Contact Failure
,”
Wear
,
224
, No.
1
, pp.
66
78
.
16.
Jiang
,
Y.
, and
Kurath
,
P.
,
1996
, “
Characteristics of the Armstrong-Frederick Type Plasticity Models
,”
Int. J. Plast.
,
12
, pp.
387
415
.
17.
Jiang
,
Y.
, and
Sehitoglu
,
H.
,
1996
, “
Modeling of Cyclic Ratchetting Plasticity: Part II—Implement of the New Model and Comparison of Theory with Experiments
,”
ASME J. Appl. Mech.
,
63
, pp.
726
733
.
18.
Moore, H. F., and Kommers, J. B., 1927, The Fatigue of Metals, First Ed., McGraw-Hill, NY.
19.
Polak
,
J.
,
Helesic
,
J.
, and
Obrtlik
,
K.
,
1990
, “
Cyclic Strain Localization in Copper Single Crystals and Polycrystals
,”
Scr. Metall.
,
24
, pp.
415
420
.
20.
Polak
,
J.
,
Obrtlik
,
K.
,
Hajek
,
M.
, and
Vasek
,
A.
,
1992
, “
Cyclic Softening in Annealed Polycrystalline Copper
,”
Mater. Sci. Eng., A
,
154
, pp.
L15–L18
L15–L18
.
21.
Polak
,
J.
,
Obrtlik
,
K.
, and
Helesic
,
J.
,
1991
, “
Cyclic Strain Localization in Polycrystalline Copper at Room Temperature and Low Temperatures
,”
Mater. Sci. Eng., A
,
132
, pp.
67
76
.
22.
Krajcinovic
,
D.
, and
Vujosevic
,
M.
,
1998
, “
Strain Localization-Short to Long Correlation Length Transition
,”
Int. J. Solids Struct.
,
35
, pp.
4147
4166
.
23.
Kruml
,
T.
,
Polak
,
J.
,
Obrtlik
,
K.
, and
Degallaix
,
S.
, “
Dislocation Structures in the Bands of Localized Cyclic Plastic Strain in Austenitic 316L and Austenitic-Ferritic Duplex Stainless Steels
,”
Acta Mater.
,
45
, pp.
5145
5151
.
24.
Rice, J. R., 1976, “The Localization of Plastic Deformation,” Theoretical and Applied Mechanics, W. T. Koiter, ed., North-Holland Publishing Company, pp. 207–220.
25.
Mughrabi
,
H.
,
1983
, “
Dislocation Wall and Cell Structures and Long-Range Internal Stresses in Deformed Metal Crystals
,”
Acta Metall.
,
31
, pp.
1367
1379
.
26.
Winter
,
A. T.
,
1974
, “
A Model for the Fatigue of Copper at Low Plastic Strain Amplitudes
,”
Philosophy Magazine
,
30
, pp.
719
738
.
27.
Kuhlmann-Wilsdorf
,
D.
, and
Laird
,
C.
,
1977
, “
Dislocation Behavior in Fatigue
,”
Mater. Sci. Eng., A
,
27
, pp.
137
156
.
28.
Pedersen
,
O. B.
, and
Winter
,
T.
,
1982
, “
Fatigue Hardening and Nucleation of Persistent Slip Bands in Copper
,”
Acta Metall.
,
30
, pp.
711
718
.
29.
Lorenzo
,
F.
, and
Laird
,
C.
,
1982
, “
Strain Bursts in the Pure Copper Subjected to Various Forms of Static and Cyclic Loading at Ambient Temperature
,”
Mater. Sci. Eng., A
,
52
, pp.
187
194
.
30.
Lorenzo
,
F.
, and
Laird
,
C.
,
1984
, “
Strain Bursts in the Cyclic Creep of Copper Single Crystals at Ambient Temperature
,”
Acta Metall.
,
32
, pp.
671
680
.
31.
Hong
,
S.
, and
Laird
,
C.
,
1990
, “
Cyclic Deformation Behavior of Cu-16at.% Al Single Crystals I: Strain Burst Behavior
,”
Mater. Sci. Eng., A
,
124
, pp.
183
201
.
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