Visualization of strain distribution in tensile test of ferrite + martensite multilayered steel sheet by digital image correlation method
Visualization of strain distribution in tensile test of ferrite + martensite multilayered steel sheet by digital image correlation method
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DOI：
10.1016/j.promfg.2018.07.271
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
N. Koga;Masayuki Suzuki;O. Umezawa
中科院分区：
文献类型：
--
作者：
N. Koga;Masayuki Suzuki;O. Umezawa
采用数字图像相关法对铁素体+马氏体多层钢拉伸变形时的应变分布进行了可视化，并对其局部变形和断裂行为进行了表征。应变沿与拉伸方向成沿着45度连续分布，且主要集中在马氏体层中。高应变马氏体层产生空洞或裂纹，它们的合并导致断裂。因此，硬层的变形能力和延展性对多层钢的变形和断裂起着重要作用。
A strain distribution introduced by tensile deformation in a ferrite + martensite multilayered steel was visualized using the digital image correlation method and its local deformation and fracture behavior were characterized. The strain was continuously distributed along 45 degrees from the tensile direction regardless of the layers and was predominately to concentrate in martensite layers. Voids or cracks were generated from highly strained martensite layers and their coalescence led to the fracture. Therefore, the deformability and ductility of hard layer play an important role in the deformation and fracture in a multilayered steel.