The New and Upgraded Neutron Instruments for Materials Science at HMI - Current Activities in Cooperation with Industry
The New and Upgraded Neutron Instruments for Materials Science at HMI - Current Activities in Cooperation with Industry
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HMI 全新升级的材料科学中子仪器 - 当前与工业界的合作活动
DOI：
10.4028/www.scientific.net/msf.524-525.223
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
R. Schneider
中科院分区：
文献类型：
--
作者：
T. Poeste;R. Wimpory;R. Schneider
工程学的最新进展包括新材料的开发及其加工和处理方面的创新。材料技术，如金属、合金、陶瓷和复合材料的研究，特别是对残余应力分布和织构的无损分析，已经变得越来越重要。柏林BENSC、HMI和BENSC的专用残余应力衍射仪E3和E7已经配备了新的二维位置敏感探测器。计划在2006年对单色仪系统进行升级，其中包括完全弯曲的硅晶体，以优化强度和角分辨率，从而大大提高应变测量的衍射仪效率。可提供一系列样品定位设备，例如用于重量达5公斤的样品的封闭式欧拉托架、可将样品倾斜至90°的重样品(可达50公斤)的第二个托架，以及可容纳最大300公斤和1000毫米直径的样品的平移台。量规体积可以通过新的计算机控制的可变切缝系统进行调整，范围从1x1x1 mm³到几mm³。在机械或热加载过程中(高达2000K)，可在工业部件内进行现场残余应力分析。通过专门设计的软件实现了数据的快速可视化和评估。粉末衍射图是通过在二维400*400 mm²平面探测器上的散射角相关的德拜-谢勒线上求和来计算的。大量的束流时间专门用于工业研究。被调查的部件包括曲轴、叶轮、活塞、气缸盖、涡轮叶片和焊缝。这两个仪器的设计相似，其中E3被设置为更高的通量，因此穿透深度，而E7被设计为更高的角度分辨率。
Recent progress in engineering includes the development of new materials and innovations in their processing and treatments. Material technologies, like the study of metals, alloys, ceramics and composites, especially non-destructive analyses of residual stresses profiles and textures, have gained an increasing importance. The dedicated residual stress diffractometers E3 and E7 at BENSC, HMI, Berlin are already equipped with new two-dimensional position sensitive detectors. An upgrade of the monochromator system is planned for 2006 which includes perfectly bent silicon crystals in order to optimise both intensity and angular resolution yielding a large gain of the diffractometer efficiency for strain measurements. A range of equipment for sample positioning is available, such as a closed Eulerian cradle for samples with weights of up to 5 kg, a second cradle for heavy samples (up to 50 kg) with the ability to tilt the samples up to 90° and a translation table carrying samples of up to 300 kg and 1000 mm in diameter. Gauge volumes can be adjusted by a new computer controlled variable slitsystem in a range from 1x1x1 mm³ up to several mm³. In-situ residual stress analysis can be performed within industrial components during mechanical or thermal loading (up to 2000 K). Rapid data visualization as well as evaluation is performed by the specially designed software. The powder diffraction pattern is calculated by summation over the scattering angle dependent Debye- Scherrer lines on the two-dimensional 400*400 mm² planar area detector. A large amount of beam time is exclusively used for industrial research. Among the components that were investigated are crankshafts, impellers, pistons, cylinder heads, turbine blades and welds. Both instruments are similarly designed, where E3 is set up for higher flux and therefore penetration depths and E7 is designed for higher angular resolution.