金属学报  1992, Vol. 28 Issue (3): 21-26

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粗晶纯Al多晶材料的循环形变——Ⅱ.断口形貌

夏月波;王中光

中国科学院金属研究所;材料疲劳与断裂国家重点实验室;中国科学院金属研究所;材料疲劳与断裂国家重点实验室

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

夏月波;王中光. 粗晶纯Al多晶材料的循环形变——Ⅱ.断口形貌[J]. 金属学报, 1992, 28(3): 21-26.
, . CYCLIC DEFORMATION OF COARSE GRAINED POLYCRYSTALLINE PURE Al Ⅱ. FRACTURE SURFACE MORPHOLOGY[J]. Acta Metall Sin, 1992, 28(3): 21-26.

摘要 参考文献 相关文章 Metrics 全文: PDF(1498 KB)   摘要: 对粗晶纯Al多晶体的疲劳断口进行了扫描电镜分析,在应变控制循环形变下,晶粒粗大而延性很好的金属的疲劳断口具有某些特征:断裂源少而集中,断裂源附近裂纹呈扇形扩展,疲劳条纹为循环解理刻面,每一条纹由较宽的解理刻面和窄的解理台阶两部分组成,台阶往往由于塑性形变而钝化;在裂纹扩展第Ⅱ阶段的疲劳条纹清晰、连续,布满裂纹扩展第Ⅱ阶段的整个区域,不同水平面形成的条纹间以“麻花形”的条带连接;多处观察到沿条纹形成的二次微裂纹,有些已发展成二次宏观裂纹,并有二次疲劳条纹;在断口上可观察到解理小舌台;断口上无最后拉断的静断区,对疲劳条纹的形成机制进行了初步的探讨。 关键词 ： 疲劳断口,  纯铝,  疲劳条纹,  二次裂纹,  解理小舌台     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 收稿日期: 1992-03-18      基金资助:国家自然科学基金 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 夏月波 王中光 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/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] 张莹 张义文 张娜 刘明东 刘建涛. 粉末冶金高温合金FGH97的低周疲劳断裂特征[J]. 金属学报, 2010, 46(4): 444-450. [2] 黄涛; 曲家惠; 胡卓超; 王福; 左良 . 高纯铝箔在异步轧制和再结晶过程中取向的演变[J]. 金属学报, 2005, 41(9): 953-957 . [3] 韩礼红; 李梁; 孙军 . 约束条件下界面纯铝层裂尖应力场的数值分析[J]. 金属学报, 2004, 40(9): 920-926 . [4] 韩礼红; 李梁; 孙军 . 双界面约束下纯铝层韧脆转变行为的实验研究[J]. 金属学报, 2003, 39(9): 920-925 . [5] 胡津; 姚忠凯; 赵连城 . 晶须增强纯铝基复合材料表面腐蚀形貌的原子力显微术观察[J]. 金属学报, 2002, 38(9): 1002-1005 . [6] 吕爱强; 蒋奇武; 王福; 左良; 梁志德 . 异步轧制对高纯铝箔冷轧织构的影响[J]. 金属学报, 2002, 38(9): 974-978 . [7] 胡津; 任文超 . 纯铝基复合材料的应力腐蚀与氢致开裂[J]. 金属学报, 2002, 38(2): 174-176 . [8] 程英亮; 张鉴清 . NaCl溶液中LC4，LY12及纯铝腐蚀过程的电化学噪声特征[J]. 金属学报, 2002, 38(1): 74-78 . [9] 王桂芹; 刘顺华 . 硼对工业纯Al导电性的影响[J]. 金属学报, 2000, 36(6): 597-601 . [10] 袁立曦;方前锋. 内耗数据的非线性拟合及其在纯铝竹节晶界弛豫中的应用[J]. 金属学报, 1998, 34(10): 1016-1020. [11] 倪玉山;程光旭;匡震邦. 焊接接头材料低周疲劳断口的分形分析[J]. 金属学报, 1992, 28(11): 32-39. [12] 程波林;葛庭燧. 晶粒间界局域无序化引起的滞弹性弛豫[J]. 金属学报, 1990, 26(5): 5-10. Viewed Full text Abstract Cited   Shared      Discussed