Neutron Bragg-edge-imaging for strain mapping under in situ tensile loading
Neutron Bragg-edge-imaging for strain mapping under in situ tensile loading
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DOI：
10.1063/1.3582138
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发表时间：
2011-05-01
影响因子：
3.2
通讯作者：
Banhart, J.
中科院分区：
文献类型：
--
作者：
Woracek, R.;Penumadu, D.;Banhart, J.
在冷中子反应堆源的波长选择性中子照相被用来测量应变和确定（残余）应力在平面应力条件下的钢样品。我们提出了一种新的技术，使用能量分辨中子成像系统的基础上的双晶体单色器，并配备了一个专门开发的（原位）双轴负载框架进行布拉格边缘的透射成像。中子成像技术提供了一个7厘米7厘米的观察面积与空间分辨率的顺序上类似于100 μ m。对铁素体钢合金A36（ASTM international）样品的（110）点阵面的布拉格边缘的应力诱导位移进行了空间分辨。此外，它表明，结果与中子衍射和电阻基应变计roxos获得的比较数据一致。(C)2011年美国物理学会。[doi：10.1063/1.3582138]
Wavelength selective neutron radiography at a cold neutron reactor source was used to measure strain and determine (residual) stresses in a steel sample under plane stress conditions. We present a new technique that uses an energy-resolved neutron imaging system based on a double crystal monochromator and is equipped with a specially developed (in situ) biaxial load frame to perform Bragg edge based transmission imaging. The neutron imaging technique provides a viewing area of 7 cm by 7 cm with a spatial resolution on the order of similar to 100 mu m. The stress-induced shifts of the Bragg edge corresponding to the (110) lattice plane were resolved spatially for a ferritic steel alloy A36 (ASTM international) sample. Furthermore it is demonstrated that results agree with comparative data obtained using neutron diffraction and resistance based strain-gauge rosettes. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3582138]