金属学报  1992, Vol. 28 Issue (5): 44-50

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8090Al-Li合金的疲劳裂纹扩展

王中光;张匀;胡壮麒;何世禹;李清健

中国科学院金属研究所;材料疲劳与断裂国家重点实验室;研究员;沈阳(110015)中国科学院金属研究所;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;哈尔滨工业大学;哈尔滨工业大学

FATIGUE CRACK PROPAGATION IN Al-Li ALLOY 8090

WANG Zhongguang;ZHANG Yun;HU Zhuangqi;HE Shiyu;LI Qingjian State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; Academia Sinica; Shenyang Harbin Institute of Technology; Correspendent profersor; Insitute of Research; Acodemia Sinica; Sheyang 110015

王中光;张匀;胡壮麒;何世禹;李清健. 8090Al-Li合金的疲劳裂纹扩展[J]. 金属学报, 1992, 28(5): 44-50.
, , , , . FATIGUE CRACK PROPAGATION IN Al-Li ALLOY 8090[J]. Acta Metall Sin, 1992, 28(5): 44-50.

摘要 参考文献 相关文章 Metrics 全文: PDF(2091 KB)   摘要: 研究了8090型Al—Li合?疲劳裂纹扩展行为以及组织结构和环境的影响,结果表明,在空气中,自然时效和欠时效?现出最好的疲劳裂纹扩展阻力,其次是峰时效状态,而过时效状态的疲劳裂纹扩展阻力最低,在3.5％NaCl水溶液中,时效状态对疲劳裂纹扩展行为有着同空气中相同的影响规律,但在同样的时效条件下,在3.5％NaCl水溶液中的疲劳裂纹扩展阻力要比空气中的低,在相同的应力强度因子范围△K作用下,缺口短裂纹和物理短裂纹均表现出比长裂纹高的扩展速率,用位错的平面滑移性和循环滑移可逆性解释了时效的影响,用裂纹的闭合效应和裂纹尖端塑性区尺寸说明了长短裂纹扩展行为的差别。 关键词 ： Al-Li合金,  长短疲劳裂纹,  闭合效应,  平面滑移特性     Abstract：Fatigue crack growth rates of 8090 type Al-Li alloy in air were found to bestrongly dependent upon the aging conditions. The naturally aged and underaged specimensshowed the highest resistance to the fatigue crack propagation. The fatigue crack growth re-sistance of the overaged specimen is the lowest and that of the peakaged specimen in between.As compared to air, 3.5%NaCl solution did not change the effect of aging conditions on thefatigue crack growth, but caused a decrease of the resistance to the fatigue crack growth un-der the same aging condition. Both short cracks from notch and physically short cracksshowed much higher rates of fatigue crack propagation in comparison with long cracks underthe same aging condition and stress intensity level. The growth behavior of the short crackdepends on its type. The growth rate of short crack from notch decreases first to a minimumand then increases with increasing AK. However, the physically short crack grows at aprogressively increasing rate. The effects of aging conditions were explained in terms of theslip planarity of dislocations and the cyclic slip reversibility. The observed short crack behav-ior was considered to be dependent on the crack closure and the local plasticity near the crack Key words： Al-Li alloy    short and long fatigue crack    closure effect    slip planarity 收稿日期: 1992-05-18      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 王中光 张匀 胡壮麒 何世禹 李清健 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1992/V28/I5/44 1 Jata K V, Starke E A Jr., Metall. Trans., 1986; 17A: 1011 2 Venkateswara Rao K T, Yu W, Ritchie R O. Metall Trans, 1988; 19A: 549 3 Venkateswara Rao K T, Yu W, Ritchie R O. Metall Trans, l988; 19A: 563 4 陈铮.航空学报,1990;11(8) :B369 5 Nicholls D J, Martin J W. Fatigue Fract Eng Mater Struct, 1990; 13: 83 6 Haddleton F L, Murphy S, Griffin T J. J Phys Colloq, 1987; 48 (9) : 809 7 Peters M, Bachmann V, Welpmann K. J Phys Colloq, 1987; 48 (9) : 785 8 HE S Y, Li QJ, Feng X Z, Wang Z G, Zhang Y. Chin J Met Sci Technol, to be published 9 Allen R J, Booth G S, Jutla T. Fatigue Fract Eng Mater Struct, 1988; 11: 45 10 李清健.哈尔滨工业大学硕士学位论文,1991 11 Ritchie R O, Yu W. In: Ritchie R O, Landford J eds., Small Fatigue Cracks, AIME, 1986: 167--189 12 Guiu F, Stevens R N. Fatigue Fract Eng Mater Struct, 1990; 13: 625 13 Miller K J. Fatigue Fract Eng Mater Struct, 1987; 10: 75- [1] 王硕, 王俊升. Al-Li合金中 δ′/θ′/δ′复合沉淀相结构演化及稳定性的第一性原理探究[J]. 金属学报, 2022, 58(10): 1325-1333. [2] 李师居, 李洋, 陈建强, 李中豪, 许光明, 李勇, 王昭东, 王国栋. 电磁振荡场作用下双辊铸轧制备2099Al-Li合金的偏析行为及组织性能[J]. 金属学报, 2020, 56(6): 831-839. [3] 蔡超,李煬,李劲风,张昭,张鉴清. 2A97 Al-Li合金薄板时效析出与电位及晶间腐蚀的相关性研究[J]. 金属学报, 2019, 55(8): 958-966. [4] 李旭,杨庆波,樊祥泽,呙永林,林林,张志清. 变形参数对2195 Al-Li合金动态再结晶的影响[J]. 金属学报, 2019, 55(6): 709-719. [5] 李劲风,刘丹阳,郑子樵,陈永来,张绪虎. Er微合金化对2055 Al-Li合金微观组织及力学性能的影响*[J]. 金属学报, 2016, 52(7): 821-830. [6] 刘奋军, 傅莉, 张纹源, 孟强, 董春林, 栾国红. 2099-T83/2060-T8异质Al-Li合金搅拌摩擦焊搭接界面结构与力学性能[J]. 金属学报, 2015, 51(3): 281-288. [7] 王东 董春林 肖伯律 高崇 何淼 栾国红 马宗义. 焊接参数对AlCuLi合金搅拌摩擦焊接头微观结构和力学性能的影响[J]. 金属学报, 2012, 48(9): 1109-1115. [8] 李劲风; 张昭; 曹发和; 程英亮; 张鉴清; 曹楚南 . Al-Li合金在EXCO溶液中腐蚀的电化学阻抗研究[J]. 金属学报, 2003, 39(4): 426-430 . [9] 李晓玲; 陈铮; 刘晓光; 刘兵 . Al-Li合金中δ'相沉淀过程原子图像的计算机模拟[J]. 金属学报, 2002, 38(5): 458-462 . [10] 刘志义; 刘冰 . 脉冲电流对2091Al-Li合金超塑变形机理的影响[J]. 金属学报, 2000, 36(9): 944-951 . [11] 林肇琦; 茹红强 . 氢对Al-Li合金8091-T6疲劳寿命和断裂行为的影响[J]. 金属学报, 1999, 35(3): 257-260 . [12] 孟亮;郑修麟. 杂质及Ce对8090Al-Li合金内、外韧化水平的影响[J]. 金属学报, 1997, 33(8): 802-806. [13] 吴细毛;艾素华;张匀;王中光;韩行霖. 8090Al-Li合金的低周疲劳行为[J]. 金属学报, 1997, 33(7): 702-708. [14] 田宝辉;李焕喜;张永刚;陈昌麒. Al—Li单晶体中锯齿流变行为的影响因素[J]. 金属学报, 1997, 33(6): 577-582. [15] 林肇琦;赵刚;李洪晓;茹红强;刘春明. 氢对Al-Li合金2091-T6组织性能的影响[J]. 金属学报, 1997, 33(10): 1047-1052. Viewed Full text Abstract Cited   Shared      Discussed