Deformation measurements of three types of Portevin-Le Chatelier bands

• 来源期刊: 中国物理（英文版）
• 关键词: Portevin-Le Chatelier (PLC) effect digital speckle correlation (DSC) method shear band dynamic strain aging (DSA)
• 年，卷（期）: 2006,（10）
• 页码范围: 2378-2384
• 页数: 7页
• 语种: 英文

摘要

In this paper a technique based on high-speed digital photography and the digital speckle correlation (DSC) method is used for the quantitative measurement of the displacement and strain fields of various Portevin-Le Chatelier (PLC) bands (types A, B, and C). The experimental results clearly show the nucleation process of a type-B band and the propagation of a type-A band. The results also reveal that there exists an elastic shrinkage deformation outside a PLC band during a large avalanche-like deformation inside the PLC band.