New Developments of the Materials Science Diffractometer STRESS-SPEC
New Developments of the Materials Science Diffractometer STRESS-SPEC
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材料科学衍射仪STRESS-SPEC的新进展
DOI：
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发表时间：
2017
期刊：
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通讯作者：
H. Brokmeier
中科院分区：
文献类型：
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作者：
J. Rebelo;M. Hofmann;W. Gan;C. Randau;Karl Braun;K. Zeitelhack;I. Defendi;J. Krueger;E. Faulhaber;H. Brokmeier
德国加兴 FRM II 的高通量中子衍射仪 STRESSSPEC 提供了灵活的仪器设置，适合快速表面残余应变测量。同样，批量、局部或梯度纹理分析也是可行的。这里介绍了仪器硬件（探测器、狭缝）的改进以及残余应力分析方法的发展。内部开发的新探测器系统最近已安装并成功调试。与原始延迟线检测器相比，新检测器提供更高的分辨率并允许事件模式类型测量。调试测量结果显示，与之前的探测器相比，性能提高了近 2 倍。此外，最近开发的用于表面杂散应变校正的新分析模型已成功应用于焊接奥氏体钢样品。因此，可以从表面（200μm）到主体（几毫米）进行无损测量，而无需任何额外耗时的杂散应变校正实验。
The high flux neutron diffractometer STRESSSPEC at FRM II, Garching Germany, offers a flexible instrument setup suitable for fast and surface residual strain measurements. Likewise bulk, local or gradient texture analyses are feasible. Here improvements of the hardware (detector, slits) of the instrument as well as developments on methods for residual stress analysis are presented. A new detector system developed inhouse was recently installed and successfully commissioned. Compared to the original delay line detector the new detector provides much higher resolution and allows event mode type measurements. Results of the commissioning measurements show a performance increase of nearly a factor of 2 compared to the former detector. Moreover the new analytical model, recently developed for surface spurious strain corrections, was successfully applied at a welded austenitic steel sample. Thus nondestructive measurements from the surface (200 μm) into the bulk (several millimeters) are possible without any extra time consuming experiments for spurious strains corrections.