Spatial characteristics of the Portevin-Le Chatelier deformation bands in Al-4 at%Cu polycrystals
Spatial characteristics of the Portevin-Le Chatelier deformation bands in Al-4 at%Cu polycrystals
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DOI：
10.1016/j.msea.2005.05.059
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发表时间：
2005-08
期刊：
影响因子：
6.4
通讯作者：
Zhenyu Jiang;Qingchuan Zhang;Hui-Ming Jiang;Zhongjia Chen;Xiaoping Wu
中科院分区：
文献类型：
--
作者：
Zhenyu Jiang;Qingchuan Zhang;Hui-Ming Jiang;Zhongjia Chen;Xiaoping Wu
Portevin-Le Chatelier（PLC）效应代表了许多工业金属合金中典型的塑性不稳定性。在空间域中，这种效应通常包括带状组织的反复形核和扩展，其中塑性变形沿拉伸试样沿着方向集中。本文应用数字散斑干涉（DSPI）和数字散斑相关（DSC）技术，对Al-4at%Cu多晶体PLC变形带的空间特征（几何形状、带内局部塑性变形）和动力学特征（带的传播、带迁移细节）进行了同步定量研究。
The Portevin-Le Chatelier (PLC) effect represents a typical plastic instability in many metallic alloys of industrial interest. In space domain, this effect commonly consists of repeated nucleation and propagation of band structure, in which the plastic deformation concentrates, along the tensioned specimen. In this paper, a novel digital speckle pattern metrology technique including digital speckle pattern interferometry (DSPI) and digital speckle correlation (DSC) has been applied to investigate the spatial features (geometrical shape, localized plastic deformation in band) and dynamic characteristics (propagation of the bands, details of the band migration) of the PLC deformation bands in Al-4at%Cu polycrystals simultaneously and quantitatively.