中子织构谱仪原位加载装置  

In-situ Loading Device for Neutron Texture Diffractometer

作　　者：陈铭韬 刘晓龙[1] 侯宇晗 朱桂杰 李玉庆[1] 田庚方[1] 白若玉 李眉娟[1] 孙凯[1] 陈东风[1] CHEN Mingtao;LIU Xiaolong;HOU Yuhan;ZHU Guijie;LI Yuqing;TIAN Gengfang;BAI Ruoyu;LI Meijuan;SUN Kai;CHEN Dongfeng(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《原子能科学技术》2024年第8期1760-1766,共7页Atomic Energy Science and Technology

基　　金：国家重点研发计划(2023YFA1608801);国家自然科学基金面上项目(12075321)。

摘　　要：原位加载过程中织构演化研究对于深入理解材料在不同变形工艺及服役条件下变形方式和性能演化机制具有重要意义。本文基于中国先进研究堆(CARR)中子织构谱仪,设计并研制了一台专用原位加载装置。该装置的最大加载力为10 kN,加载速率在0.01~3 mm/min范围内连续可调,可绕中子织构谱仪欧拉环χ角在0°~90°旋转、沿装置拉伸轴进行0°~360°自转,以实现多晶材料在原位拉伸和挤压过程中微观结构和体织构实时演变测量。利用该装置对热挤压Mg-1.2Al-0.3Ca-0.47Mn(MMK1)合金原位拉伸过程中织构演化的研究发现,随着拉伸位移的增加,(0002)基面织构强度不断增加,表明该装置可实现多晶材料原位加载过程中织构演化测量。CARR中子织构谱仪原位加载装置的设计和研制,为了解多晶材料微观结构与力学性能关系,尤其是在外部载荷条件下材料结构演化的规律和机理研究提供了重要的技术支撑。The texture of polycrystalline material is the preferred orientation distribution of its crystallites.As an intrinsic feature of metals,alloys,ceramics and polymers,texture strongly affects many properties of polycrystalline materials.It will make the material exhibit significant anisotropy in properties,consequently affecting its service performance.Therefore,texture is regarded as one of the essential parameters for describing a full microstructural characterization of polycrystalline materials.Texture determination is usually based on the pole figure measurements by X-ray,synchrotron radiation,electron back-scatter diffraction and neutron diffraction.Among these techniques,neutron diffraction offers many advantages in texture characterization due to the low absorption coefficient of neutrons.For example,it enables the use of sample environment devices to investigate texture evolution during in-situ high temperature or loading processes of materials.The first neutron texture diffractometer in China has been built at the China Advanced Research Reactor(CARR),due to strong demand for texture measurement with neutrons from the domestic user community.This instrument is mainly applied to study texture in commonly used industrial materials and engineering components.As the study of texture evolution during in-situ loading processes is extremely important for a deeper understanding of the deformation modes and performance evolution mechanisms of materials under various deformation processes and service environment.A specialized in-situ loading device was designed and developed based on the neutron texture diffractometer of CARR,capable of applying a maximum loading force of 10 kN,with a continuously adjustable loading rate ranging from 0.01 to 3 mm/min.In order to realize real-time measurement of the microstructure and bulk texture evolution in polycrystalline materials during in-situ tensile and compression processes,this loading device can be rotated around neutron texture diffractometer Euler cradleχangle from 0�

关 键 词：中国先进研究堆 中子织构谱仪 原位加载装置 体织构演化 挤压镁合金 

分 类 号：TL99[核科学技术—核技术及应用]