Strain distribution measurement in laminated martensitic/austenitic steel during a compression test by the electron moiré method
Strain distribution measurement in laminated martensitic/austenitic steel during a compression test by the electron moiré method
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DOI：
10.1177/0309324711405752
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发表时间：
2011-07
期刊：
影响因子：
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通讯作者：
S. Kishimoto;Y. Tanaka;F. Yin;Y. Kagawa;K. Nagai
中科院分区：
文献类型：
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作者：
S. Kishimoto;Y. Tanaka;F. Yin;Y. Kagawa;K. Nagai
用电子云纹法测量了脆性马氏体钢(WT-780C)和韧性奥氏体钢(SUS304)组成的多层钢在压缩试验过程中的应变分布。利用电子光刻技术在样品表面制作了间距为5μm的非常精细的模型栅格，并且可以使用与模型栅格间距几乎相同的电子束扫描作为主栅格。每个初级电子的次级电子数量之间的差异导致莫尔条纹由亮部分和暗部分组成。测量了电子莫尔条纹的间距，利用电子莫尔条纹的间距和电子束扫描的间距计算了试件上的应变。每种钢板和边界的应变分布不均匀。不同钢板边界附近的应变大于SUS304钢板和WT-780C钢板的应变。
The strain distribution in a multi-layered steel composed of brittle martensitic steel (WT-780C) and ductile austenitic steel (SUS304) during a compressive test was measured by the electron moiré method. A very fine model grid with 5 μm spacing was fabricated using electron lithography techniques on the surface of the specimen and an electron beam scan in which spaces are almost the same as those of the model grid can be used for the master grid. The difference between the amounts of secondary electrons per primary electron causes moiré fringes that consist of bright and dark parts. The spacing of the electron moiré fringe was measured, and the strain on the specimen was calculated by using the spacing of the electron moiré fringe and the spacing of the electron beam scan. The strain distribution was not uniform for each steel sheet and the boundaries. The strain near the boundary between the different steel sheets is larger than that in the SUS304 sheet and that in the WT-780C sheet.