金属学报  2006, Vol. 42 Issue (6): 619-623

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Al-4%Cu合金中锯齿形屈服剪切带的变形测量

项国富; 张青川; 刘灏文; 江慧丰; 伍小平

中国科学技术大学中国科学院材料力学行为和设计重点实验室; 合肥 230027

The Deformation Measurements of Portevin-Le Chatelier Shear Bands in Al-Cu Alloys

XIANG Guofu; ZHANG Qingchuan; LIU Haowen; JIANG Huifeng; WU Xiaoping

中国科学技术大学力学与机械工程系

项国富; 张青川; 刘灏文; 江慧丰; 伍小平 . Al-4%Cu合金中锯齿形屈服剪切带的变形测量[J]. 金属学报, 2006, 42(6): 619-623 .
, , , , . The Deformation Measurements of Portevin-Le Chatelier Shear Bands in Al-Cu Alloys[J]. Acta Metall Sin, 2006, 42(6): 619-623 .

摘要 参考文献 相关文章 Metrics 全文: PDF(323 KB)   摘要: 通过高速CCD(1000 fps)连续记录Al-4%Cu合金材料在拉伸实验中出现的B型锯齿形屈服 (PLC)剪切带发生前后一系列非相干光散斑图, 结合数字散斑相关法图像分析技术, 定量地 给出了PLC剪切带及周围区域的位移和应变的空间分布, 再现了PLC剪切带随时间演化 发展的过程. 实验结果清楚地证实了B型PLC剪切带的一种演化机制, 即先在试样一侧 成核, 然后与拉伸轴成一定角度横向贯穿整个试样, 最终形成非均匀塑性变形带. 实 验结果表明, 在PLC剪切带形成瞬间变形带外存在弹性收缩变形. 关键词 ： Al-4%Cu合金,  锯齿形屈服     Abstract：A series of white light speckle patterns was continually recorded by high-speed CCD (1000 fps) during the formation of type B serrated yielding (PLC) shear band in tensile tests of Al-4%Cu alloy. With the image analysis technology of digital speckle correlation method, the displacement and strain spatial distribution of PLC shear band were quantitatively obtained, and the evolution process of PLC shear band with time was reproduced. The results clearly prove an evolution mechanism of type B PLC shear bands, that is, a PLC shear band first nucleates at one side of specimen, then transversely runs through the entire specimen section with a certain angle, finally forms an inhomogeneous deformation bands. The experimental results show that there exists elastic shrinkage deformation outside the band during the formation of PLC shear band. Key words： Al-4%Cu alloy    serrated yielding    收稿日期: 2005-09-28      ZTFLH:  O344.7   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 项国富 张青川 刘灏文 江慧丰 伍小平 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y2006/V42/I6/619 [1] Potevin A, Le Chatelier F. Comp Rend Acad Sci (Paris), 1923; 176: 507 [2] Chihab K, Estrin Y, Kubin L P. Scr Metall, 1987; 21: 203 [3] Cottrell A H. Dislocation and Plastic Flow in Crystals. Chapter 4, London: Oxford University Press, 1953 [4] Lebyodkin M, Dunin-Barkowskii L, Brechet Y, Estrin Y, Kubin L P. Acta Mater, 2000; 48: 2529 [5] Pink E, Weinhandl H. Scr Mater, 1998; 29: 1309 [6] Tian B H, Zhang Y G, Chen C Q. Acta Metall Sin, 1996; 32: 249 (田宝辉,张永刚,陈昌麒．金属学报, 1996;32:249) [7] Tian B H, Li H X, Zhang Y G, Chen C Q. Acta Metall Sin, 1998; 34: 603 (田宝辉,李焕喜,张永刚,陈昌麒．金属学报,1998;34:603) [8] Ziegenbein A, Hadner P, Neuhauser H. Comput Mater Sci, 2000; 19: 27 [9] Zhang Q C, Toyooka S, Meng Z B, Suprapedi. In: Backlini G Y, Nove C A, Boltz E S, eds., Nondestructure Evaluation of Aging Materials and Composites III, Vol.3585, Newport Beach, CA, SPIE, 1999: 389 [10] Zhang Q C, Jiang Z Y, Jiang H F, Chen Z J, Wu X P. Int J Plast, 2005; 21: 2150 [11] Jiang H F, Zhang Q C, Jiang Z Y, Chen Z J, Wu X P. Chin Phys Lett, 2005; 22: 99 [12] Jiang H F, Zhang Q C, Jiang Z Y, Wu X P. Acta Metall Sin, 2005; 41: 727 (江慧丰,张青川,蒋震宇,伍小平．金属学报,2005;41:727) [13] Jiang Z Y, Zhang Q C, Jiang H F, Chen Z J, Wu X P. Mater Sci Eng, 2005; A403: 154 [14] Jiang Z Y, Zhang Q C, Wu X P. J Exp Mech, 2003; 18: 289 (蒋震宇,张青川,伍小平．实验力学,2003;18:289) [15] Tong W, Tao H, Zhang N, Hector L G Jr. Scr Mater, 2005; 53: 87 [16] Yamaguchi I. Opt Acta, 1981; 28: 1359 [17] Peters W H, Ranson W F. Opt Eng, 1982; 21: 427 [18] Zeng Q H, Lu D T. J Eng Graph, 2004; 25(1): 84 (曾清红,卢德唐．工程图学学报, 2004;25(1):84) [19] Estrin Y, Kubin L P. Acta Metall, 1986; 34: 2455Z [1] 钟华,李传军,王江,任忠鸣,钟云波,玄伟东. 强磁场对定向凝固Al-4.5Cu合金微观偏析的影响*[J]. 金属学报, 2016, 52(5): 575-582. [2] 钟华, 任忠鸣, 李传军, 钟云波, 玄伟东, 王秋良. 强磁场对Al-4.5Cu合金定向凝固过程中织构和晶界的影响[J]. 金属学报, 2015, 51(4): 473-482. [3] 沈裕 任忠鸣 李喜 任维丽. 纵向磁场对Al-40%Cu过共晶合金定向凝固显微组织的影响[J]. 金属学报, 2011, 47(4): 417-422. [4] 陈丹丹 张海涛 王向杰 崔建忠. 低频电磁铸造Al-4.5%Cu合金微观偏析研究[J]. 金属学报, 2011, 47(2): 185-190. [5] 屈敏; 刘林; 张卫国; 张军; 傅恒志 . 抽拉速率对定向凝固Al-4%Cu合金枝晶界面特征的影响[J]. 金属学报, 2008, 44(9): 1051-1056 . [6] 卢俊勇; 蒋震宇; 张青川 . Al-4%Cu多晶合金中锯齿形屈服现象的初步时序分析[J]. 金属学报, 2006, 42(6): 611-618 . [7] 李喜; 任忠鸣; 孙延辉; 王俊; 余建波; 任维丽 . 纵向强磁场对定向凝固Al-4.5%Cu合金显微组织的影响[J]. 金属学报, 2006, 42(2): 147-152 . Viewed Full text Abstract Cited   Shared      Discussed