Acta Metall Sin  1998, Vol. 34 Issue (7): 705-712    DOI:

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THE RELATIONSHIP BETWEEN PLASTIC DISSIPATED ENERGY, FRACTAL DIMENSION AND FATIGUE- LIFETIME OF ZIRCONIUM AND ZIRCALOY-4

XIAO Lin; GU Haicheng(State Key Laboratory for Mechanical Behaviour of Materials; Xi'an Jiaotong Universityl Xi'an 710049)

XIAO Lin; GU Haicheng(State Key Laboratory for Mechanical Behaviour of Materials; Xi'an Jiaotong Universityl Xi'an 710049). THE RELATIONSHIP BETWEEN PLASTIC DISSIPATED ENERGY, FRACTAL DIMENSION AND FATIGUE- LIFETIME OF ZIRCONIUM AND ZIRCALOY-4. Acta Metall Sin, 1998, 34(7): 705-712.

Abstract References Related Articles Recommended Metrics Download:  PDF(698KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Low cycle fatigue lifetime curves of zirconium and zircaloy-4 at room temperature and 400 ℃ were measured, respectively. Cyclic plastic dissipated energy and fractal dimension of fracture surfaces are selected as damage variable to evaluate the fatigue lifetime. The accumulated formula of plastic dissipated energy is established on the basis of considering cyclic deformation character of zirconium and zircaloy-4. The test results indicate that the relationship between cyclic plastic dissipated energy and fatigue lifetime fits power law. Fractal analysis of fracture surface shows that the relationship between fractal dimension and fatigue lifetime can be also expressed as power law. An empirical formula describing the relationship between dissipated energy, fractal dimension and fatigue lifetime, D ≈ 0.027 lnN f + 1.099 ≈0.120 lnWpf- 0.025, is obtained, and their physical mechanism is discussed thermodynamically. Key words:  zirconium      zircaloy-4      cyclic plastic dissipated energy      fatigue lifetime      Received:  18 July 1998      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1998/V34/I7/705 1 Xiao Lin, Gu Haichen.Metall Mater Trans,1997;28A:1021 2肖林.见:覃正主编博士后纵横谈─—值得关注的若干科技新动态,西安:西安交通大学出版社,1996:61(Xiao Lin.In:Qin Zheng ed,Postdoctor Talk Freely,Xi'an:Xi'an Jiaotong University Publisher,1996:61) 3 Xiao Lin, Gu Haicheng. ASME: J Eng Mater Technol, 1998; 120: 114 4 肖林,顾海澄,匡震邦稀有金属材料与工程,19952 24(2):22 (Xiao Lin, Gu Haicheng, Kuang Zhenbang. Rare Met Mate, Eng, 1995 24(2): 22) 5 Lefebvre D, Ellvin E. 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