Low cycle fatigue properties of zirconium and zircaloy-4 were investigated at RT and 400°C. The microscopic structure was determined using scanning electron microscopy and transmission electron microscopy techniques. On the basis of analyses of fatigue damage mechanism, it is believed that fatigue is an irreversible energy dissipation process. Thus, the plastic dissipation energy per cycle is selected as a fatigue damage variable. The accumulated plastic dissipation energy is calculated at the condition of considering cyclic hardening, saturation and softening characters of zirconium and zircaloy-4 during cycling. The testing results show that there present a power law between the plastic dissipation energy and fatigue lifetime.
1.
Coffin, L. F., 1979, “Fatigue in Machines and Structures—Power Generation,” Fatigue and Microstructure, 1978. ASM Mat. Sci. Seminar, 14-15 Oct. St. Louis, MO.
2.
Pandarinathan
P. R.
1980
, “Low-cycle Fatigue Studies on Nuclear Reactor Zircaloy—2 Fuel Tubes at Room Temperature, 300 and 350°C
,” J. Nucl. Mat.
, Vol. 91
, pp. 47
–58
.3.
Lemaitre
L.
Plumtree
A.
1979
, “Application of Damage Concepts to Predict Creep-Fatigue Failures
,” ASME JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY
, Vol. 101
(3
), pp. 284
–292
.4.
Chaboche
J. L.
1981
, “Continuous Damage Mechanics: A Tool to Describe Phenomena before Crack Initiation
,” Nuclear Engineering and Design
, Vol. 64
, pp. 233
–247
.5.
Kubin, L. P., and Lepinoux, J., “The Dynamic Organization of Dislocation Structures,” Inter. Proc. ICSMA—8, Pergamon Press, Oxford, pp. 35–39.
6.
Seeger, A., 1988, “Thermodynamics of Open Systems, Self-Organization and Crystal Plasticity,” Inter. Proc. ICSMA-8, Pergamon Press, Oxford, pp. 463–468.
7.
Glansdorff, P., and Prigogine, L., 1971, Thermodynamics Theory of Structure, Stability and Fluctuations, Wiley-Interscience, New York.
8.
Ivanova, V. S., 1988, “Mechanics and Synergetics of the Self-Organization and Crystal Plasticity,” Inter. Proc. ICSMA-8, Vol. 1, Pergamon Press, Oxford, pp. 463.
9.
Lin
Xiao
Haicheng
Gu
1997
, “Dislocation Structures in Zirconium and Zircaloy-4 Fatigued at Different Temperatures
,” Metall. Mater. Trans.
, Vol. 28A
, pp. 1021
–1033
.10.
Lin
Xiao
Haicheng
Gu
Zhenbang
Kuang
Cyclic Deformation Behavior of Zircaloy-4 at Diffent Temperatures
,” Acta Metall. Sinica (English Letter)
, Vol. 8
(3
), pp. 219
–225
.11.
Xiao Lin and Gu Haicheng, 1993, “HCF and LCF Fracture Mechanism of a Commercial-Purity Zirconium,” ICF8 8th Inter. Symp. on Fracture, Ukraine.
12.
Xiao Lin, 1993, “Fatigue Mechanisms and Lifetime Prediction of Zirconium and Zircaloy-4,” Ph. D. dissertation, Xi’an Jiaotong University, China.
13.
Radhakrishnan, V. M., 1982, “Damage Accumulation and Fracture Life in High-Temperature Low-Cycle Fatigue,” Low Cycle Fatigue and Life Prediction, ASTM STP 770, by C. Amzallag, eds. Wiley-Interscience, pp. 135–159.
14.
Soo Woo Nam etc., 1987, “Low-Cycle Fatigue Life Prediction in Terms of Hysteresis Energy under Creep-Fatigue Interaction,” Inter. Proc. LCF and Elastic-Plastic Behavior of Materials, K.-T. Rie, ed., Elsevier Applied Science, pp. 229–233.
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