Acta Metall Sin  1983, Vol. 19 Issue (6): 13-23    DOI:

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EFFECT OF WAVY GRAIN BOUNDARY ON CREEP FRACTURE BEHAVIOUR IN ASTROLOY ALLOY

GUO Guixiong; CAI Qigong; SHEN Huiwang (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing)

GUO Guixiong; CAI Qigong; SHEN Huiwang (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing). EFFECT OF WAVY GRAIN BOUNDARY ON CREEP FRACTURE BEHAVIOUR IN ASTROLOY ALLOY. Acta Metall Sin, 1983, 19(6): 13-23.

Abstract References Related Articles Recommended Metrics Download:  PDF(1158KB)  Export:  BibTeX | EndNote (RIS)       Abstract  By comparing the measurement and the prediction of the creep crack initiation life at the sharp notch root, it is demonstrated that the creep J~*-integral is the effective parameter controlling the asymptotic field at the tip of the notch (and so the crack). Accordingly, a combined analysis on the linear damage model and the HRR singularity is carried out and an expression for the creep crack growth rate is derived as:da/dt=Ba k/n+1 D(x_0)J~* kn/n+1which is in good agreement with the experimental results of material with smooth and wavy grain boundaries. A microscopic mechanism of the creep damage in the material with the wavy grain boundaries has been discussed from the view point of the cavity formation along the grain boundary. Received:  18 June 1983      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/Y1983/V19/I6/13 1 Larson, J.M.; Floreen, S., Metall. Trans., 8A (1977) , 51． 2 Merrick, H.H.; Floreen, S., Metall. Trans., 9A (1978) , 231． 3 Landes, J.D.; Begley, J.A., Am. Soc. Test. Mater., Spec. Tech. Publ., 590, (1976) , 128． 4 Nikbin, K.M.; Webster, G.A.; Turner, C.E., Am. Soc. Test. Mater., Spec. Tech. Publ., 601, (1976) , 47． 5 Goldman, N.L.; Hutchinson, J. W., Int. J. Solids Struct., 11 (1975) , 575． 6 Shih, C.F.; Hutchinson, J.W., J. Eng. Mater. Technol., 98 (1976) , 289． 7 蔡其巩,金属学报,12 (1976) ,45． 8 蔡其巩,ibid., 13 (1977) ,246． 9 Kumar, V.; German, M.D.; Shih, C.F., EPRI-Report, NP-1931, Palo Alto, (1980) . 10 Kubo, S.; Ohji, K.; Ogura, K., Eng. Pract. Mech., 11 (1979) , 315． 11 Miyagawa, O.; Yamamoto, M.; Kobayshi, M., Superalloys: Metallurgy and Manufacture, Eds. Kear, B.H. et al, Claitor's Publ., Baton Rouge, Louisiana, 1976, p.245． 12 Raj, R.; Ashby, M.F., Metall. Trans., 2 (1971) , 1113． 13 Gifkins, R.C., ibid., 7A (1976) , 1225． 14 Eberhardt, A.; Baudelet, B., Philos. Mag., 41 (1980) , 843． No related articles found! No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed