Acta Metall Sin  1992, Vol. 28 Issue (3): 21-26    DOI:

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CYCLIC DEFORMATION OF COARSE GRAINED POLYCRYSTALLINE PURE Al Ⅱ. FRACTURE SURFACE MORPHOLOGY

XIA Yuebo;WANG Zhongguang State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; Academia Sinica; Shenyang

XIA Yuebo;WANG Zhongguang State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; Academia Sinica; Shenyang. CYCLIC DEFORMATION OF COARSE GRAINED POLYCRYSTALLINE PURE Al Ⅱ. FRACTURE SURFACE MORPHOLOGY. Acta Metall Sin, 1992, 28(3): 21-26.

Abstract References Related Articles Recommended Metrics Download:  PDF(1498KB)  Export:  BibTeX | EndNote (RIS)       Abstract  SEM photos for very coarse grained and high ductile polycrystalline pure Alshow certain following characteristics: A few fracture sources are concentrated, the fan--shapedcrack propagated near them, and the fatigue striations are cycle cleavage facets. Each striationconsists of wide cleavage facet and narrow cleavage step. These steps often blunt due to plasticdeformation; The fatigue striations are clear and continual, and distribute to whole fracture sur-face in propagation zone of II stage. Two fatigue striations, formed in different level, areconjoined by a "twisted baked piece of pastry" band; The secondary crack along fatiguestriations were observed frequently. Some of them have already developed into secondarymacrocracks and secondary fatigue striations were found clearly on fracture surface of secon-dary crack; The whole fracture surface can be divided into two parts, crack initiation and crackpropagation zones, however, no statical--fracture zone was observed. The mechanism of fatiguestriation formation was preliminarily discussed. Key words:  fatigue crack      pure Al      fatigue striation      secondary crack      cleavage tongue      Received:  18 March 1992      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/Y1992/V28/I3/21 1 曾祥华.中国科学院院刊,1986;1:121 2 夏月波,王中光,艾素华.金属学报,1982;18:606 3 Xia Y B, Wang Z G, Wang R H. Phys Status Solidi (a), 1990; 120: 125 4 夏月波,王中光.金属学报,1992;28(2) :A51 5 Gerberich W W, Jatavallabhula K. Acta Metall, 1983; 31: 241 6 Bucci R J, Paris P C, Herterzberg R W, Schmidt R A, Anderson A F. ASTM STP 513, 1972: 125 7 Hertzberg R W, Mills W J. ASTM STP 600, 1975: 220 8 Gell M, Leverant G R. Acta Metall, 1968; 16: 553 9 Feeney J A, McMillan J C, Wei R P. Metall Trans, 1970; 1: 429 10 Otsuka A, Mori K, Miyata T. Eng Fract Mech, 1975; 7: 429 11 Bechem C D, Meyn D A. ASTM STP 436, 1968: 59 12 Gell M, Leverant G R. Trans Am Inst Min Metall Pet Eng, 1968; 242: 1869 13 Phillips A, Kerlins V, Rawe R A, Whiteson B V. Electorn Fractography Handbook. Battelle, Metals and Ceramics Information Center, 19767 [1] JIANG He, NAI Qiliang, XU Chao, ZHAO Xiao, YAO Zhihao, DONG Jianxin. Sensitive Temperature and Reason of Rapid Fatigue Crack Propagation in Nickel-Based Superalloy[J]. 金属学报, 2023, 59(9): 1190-1200. [2] QI Zhao, WANG Bin, ZHANG Peng, LIU Rui, ZHANG Zhenjun, ZHANG Zhefeng. Effects of Stress Ratio on the Fatigue Crack Growth Rate Under Steady State of Selective Laser Melted TC4 Alloy with Defects[J]. 金属学报, 2023, 59(10): 1411-1418. 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