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作为Portevin-Le Chatelier（PLC）带的重要特征之一，其离面变形仍缺乏实验研究. 本文提出使用数字剪切散斑干涉法研究GB6061铝合金中PLC带的离面变形. 通过图像相减得到的条纹图，实时观察了PLC带的几何形貌和传播过程，并获得了PLC带离面位移分布. 在1/15 s内，PLC带的最大离面位移为245 nm，位置偏向于PLC带传播的前沿. 在条纹图中，PLC带传播前沿的亮条纹始终较窄. 此外，实验还观察到PLC带位置变更和倾角转向的演化过程. 实验表明，数字剪切散斑干涉法具有高灵敏度和防震性，是研究PLC带离面变形简便有效的方法.
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关键词:
- Portevin-Le Chatelier效应 /
- 数字剪切散斑干涉法 /
- 离面变形
Digital shearography is proposed to study the out-plane deformation of the Portevin-Le Chatelier (PLC) band during tensile tests in an Al alloy. The geometrical shape and propagation of the PLC bands are visualized in real time through fringe pattern in subtracted images. In 1/15 s, the maximum out-plane displacement is 245 nm within the PLC band. The displacement distribution is asymmetric while in fringe pattern, the white fringe is narrower in the front of the PLC band than in the rear. In addition, the evolution processes of position shifting and inclination transition of the PLC bands are presented in detail.[1] Jiang H F, Zhang Q C, Xu Y H, Wu X P 2006 Acta Phys. Sin. 55 409 (in Chinese) [江慧丰, 张青川, 徐毅豪, 伍小平 2006 55 409]
[2] Peng K P, Chen W Z, Qian K W 2006 Acta Phys. Sin. 55 3569 (in Chinese) [彭开萍, 陈文哲, 钱匡武 2006 55 3569]
[3] Hu Q, Zhang Q C, Fu S H, Cao P T, Gong M 2011 Acta Phys. Sin. 60 096201 (in Chinese) [胡琦, 张青川, 符师桦, 曹鹏涛, 龚明 2011 60 096201]
[4] Sun L, Zhang Q C, Cao P T 2009 Chin. Phys. B 18 3500
[5] Halim H, Wilkinson D S, Niewczas M 2007 Acta Mater. 55 4151
[6] Cui C Y, Jin T, Sun X F 2011 J. Mater. Sci. 46 5546
[7] Liu L F, Cai Z P, Li H Q, Zhang G Y, Guo S B 2011 Chin. Phys. Lett. 28 036201
[8] McCormigk P G 1972 Acta Metall. 20 351
[9] Nortmann A, Schwink C 1997 Acta Mater. 45 2043
[10] Nortmann A, Schwink C 1997 Acta Mater. 45 2051
[11] Picu R C, Vincze G, Ozturk F, Gracio J J, Barlat F, Maniatty A M 2005 Mater. Sci. Eng. A 390 334
[12] Lu J Y, Jiang Z Y, Zhang Q C, Jiang H F, Liu H W 2006 Acta Phys. Sin. 55 3558 (in Chinese) [卢俊勇, 蒋震宇, 张青川, 江慧丰, 刘颢文 2006 55 3558]
[13] Lebyodkin M, Dunin-Barkowskii L, Bréchet Y, Estrin Y, Kubin L P 2000 Acta Mater. 48 2529
[14] Chihab K, Estrin Y, Kubin L, Vergnol P J 1987 Scripta Metall. 21 203
[15] Ziegenbein A, Hahner P, Neuhauser H 2000 Comp. Mater. Sci. 19 27
[16] Zhang Q C, Jiang Z Y, Jiang H F, Chen Z J, Wu X P 2005 Int. J. Plasticity 21 2150
[17] Jiang H F, Zhang Q C, Jiang Z Y, Chen Z J, Wu X P 2005 Chin. Phys. Lett. 22 99
[18] Xiang G F, Zhang Q C, Liu H W, Jiang H F, Wu X P 2006 Chin. Phys. 15 2378
[19] Ranc N, Wagner D 2005 Mater. Sci. Eng. A 394 87
[20] Cao P T, Zhang Q C, Xiao R, Xiong S M 2009 Acta Phys. Sin. 58 5591 (in Chinese) [曹鹏涛, 张青川, 肖锐, 熊少敏 2009 58 5591]
[21] Hung Y Y, Ho H P, He X Y 2006 J. Exp. Mech. 12 667 (in Chinese) [洪友仁, 何浩培, 何小元 2006 实验力学 12 667]
[22] Hung Y Y, Long K W, Wang J Q 1997 Opt. Lasers Eng. 27 61
[23] Shang H M, Tham L M, Chau F S 1995 J. Eng. Mater. Tech. 117 322
[24] Tay C J, Chau F S, Shang H M, Shim V P W, Toh S L 1991 Opt. Lasers Eng. 14 13
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[1] Jiang H F, Zhang Q C, Xu Y H, Wu X P 2006 Acta Phys. Sin. 55 409 (in Chinese) [江慧丰, 张青川, 徐毅豪, 伍小平 2006 55 409]
[2] Peng K P, Chen W Z, Qian K W 2006 Acta Phys. Sin. 55 3569 (in Chinese) [彭开萍, 陈文哲, 钱匡武 2006 55 3569]
[3] Hu Q, Zhang Q C, Fu S H, Cao P T, Gong M 2011 Acta Phys. Sin. 60 096201 (in Chinese) [胡琦, 张青川, 符师桦, 曹鹏涛, 龚明 2011 60 096201]
[4] Sun L, Zhang Q C, Cao P T 2009 Chin. Phys. B 18 3500
[5] Halim H, Wilkinson D S, Niewczas M 2007 Acta Mater. 55 4151
[6] Cui C Y, Jin T, Sun X F 2011 J. Mater. Sci. 46 5546
[7] Liu L F, Cai Z P, Li H Q, Zhang G Y, Guo S B 2011 Chin. Phys. Lett. 28 036201
[8] McCormigk P G 1972 Acta Metall. 20 351
[9] Nortmann A, Schwink C 1997 Acta Mater. 45 2043
[10] Nortmann A, Schwink C 1997 Acta Mater. 45 2051
[11] Picu R C, Vincze G, Ozturk F, Gracio J J, Barlat F, Maniatty A M 2005 Mater. Sci. Eng. A 390 334
[12] Lu J Y, Jiang Z Y, Zhang Q C, Jiang H F, Liu H W 2006 Acta Phys. Sin. 55 3558 (in Chinese) [卢俊勇, 蒋震宇, 张青川, 江慧丰, 刘颢文 2006 55 3558]
[13] Lebyodkin M, Dunin-Barkowskii L, Bréchet Y, Estrin Y, Kubin L P 2000 Acta Mater. 48 2529
[14] Chihab K, Estrin Y, Kubin L, Vergnol P J 1987 Scripta Metall. 21 203
[15] Ziegenbein A, Hahner P, Neuhauser H 2000 Comp. Mater. Sci. 19 27
[16] Zhang Q C, Jiang Z Y, Jiang H F, Chen Z J, Wu X P 2005 Int. J. Plasticity 21 2150
[17] Jiang H F, Zhang Q C, Jiang Z Y, Chen Z J, Wu X P 2005 Chin. Phys. Lett. 22 99
[18] Xiang G F, Zhang Q C, Liu H W, Jiang H F, Wu X P 2006 Chin. Phys. 15 2378
[19] Ranc N, Wagner D 2005 Mater. Sci. Eng. A 394 87
[20] Cao P T, Zhang Q C, Xiao R, Xiong S M 2009 Acta Phys. Sin. 58 5591 (in Chinese) [曹鹏涛, 张青川, 肖锐, 熊少敏 2009 58 5591]
[21] Hung Y Y, Ho H P, He X Y 2006 J. Exp. Mech. 12 667 (in Chinese) [洪友仁, 何浩培, 何小元 2006 实验力学 12 667]
[22] Hung Y Y, Long K W, Wang J Q 1997 Opt. Lasers Eng. 27 61
[23] Shang H M, Tham L M, Chau F S 1995 J. Eng. Mater. Tech. 117 322
[24] Tay C J, Chau F S, Shang H M, Shim V P W, Toh S L 1991 Opt. Lasers Eng. 14 13
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