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Multiscale x-ray imaging facility for monitoring and modelling structural evolution in situ

用于原位结构演化监测和建模的多尺度 X 射线成像设备

基本信息

批准号：
EP/F001452/1
负责人：
Peter Lee
金额：
$ 29.97万
依托单位：
Imperial College London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2008
资助国家：
英国
起止时间：
2008 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FF001452%2F1
关键词：
Multiscale ray imaging facility monitoring

项目摘要

This proposal is a collaborative effort forming part of the Univ. of Manchester's initiative to establish a multidisciplinary X-ray imaging room housing a number of open 'beamlines/hutches' in the Unit for Stress & Damage Characterisation. Although the system will be open beamlines as with synchrotron sources, magnification will be achieved using spot sources and geometric enlargement. This adds many challenges when designing in situ rigs to load, heat and provide special environments for testing on these laboratory beamlines. Unlike synchrotron sources where the specimen is meters away from the source with room on all sides, the highest magnifications can only be obtained in laboratory sources if the specimen is only a few millimetres from the source. The objective of the research at Imperial College is to design, build and commission a rig to apply programmed tension, compression and thermal loading whilst rotating specimens with very high accuracy. The control systems for the instrument will be designed so that it may also be used at synchrotron sources (e.g. Diamond, ESRF) if the finer temporal resolution available at these high flux sources is required for specific experiments.A landmark experimental investigation of damage evolution in semi-solid Al-Cu alloy will be performed to demonstrate the capabilites of the apparatus.This new instrument, coupled with the high resolution (and phase contrast) tomography, will allow the direct observation of damage accumulation in a range of materials whilst under load and at temperatures as high as 1000C. Further, as the loading/thermal profiles applied will be programmable, the three dimensional evolution of phases within the material will be directly quantifiable and attributable to either thermal or strain driving forces. This in situ observation instrument will complement existing electron microscopy techniques by allowing phases in the 1 to 100 micron size range to be observed in 3D. The many applications of such an instrument are listed in the main proposal, including: damage and phase evolution during semi-solid processing, sintering processes (both metal and ceramic), fatigue crack propagation at elevated temperature, processing of bio-materials, and void nucleation and coalescence during creep.

这项提议是一项合作努力，是联合国大学的一部分。关于曼彻斯特建立多学科X射线成像室的倡议，该成像室在应力和损伤特征分析股中存放了一些开放的“光束线/箱形”。虽然该系统将与同步加速器源一样是开放的光束线，但将使用点光源和几何放大来实现放大。这增加了在设计现场钻机以加载、加热和为这些实验室光束线上的测试提供特殊环境时的许多挑战。与同步加速器源不同，在同步加速器源中，样品距离源几米远，四面都有空间，而只有在样品距离源只有几毫米的情况下，实验室源才能获得最高的放大倍数。帝国理工学院的这项研究的目标是设计、建造和委托一台钻机，在以非常高的精度旋转样品的同时应用程序拉伸、压缩和热加载。仪器的控制系统将被设计成，如果特定实验需要同步加速器源(如钻石、ESRF)提供的更精细的时间分辨率，它也可以用于这些高通量源。将对半固态铝铜合金的损伤演化进行里程碑式的实验研究，以证明该仪器的能力。这种新仪器，加上高分辨率(和相衬)断层成像，将允许直接观察各种材料在加载和高达1000摄氏度的温度下的损伤累积。此外，由于所应用的载荷/热分布将是可编程的，因此材料内相的三维演变将直接可量化，并且可归因于热或应变驱动力。这种原位观察仪器将补充现有的电子显微镜技术，允许在3D中观察1至100微米范围内的相。该仪器的主要应用包括：半固态加工过程中的损伤和相演变、烧结过程(金属和陶瓷)、高温下的疲劳裂纹扩展、生物材料的加工以及蠕变过程中的空洞形核和结合。