接近服役条件下材料微观力学性能原位测试新技术的研究

项目名称： 接近服役条件下材料微观力学性能原位测试新技术的研究

项目编号： No.51275198

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 赵宏伟

作者单位： 吉林大学

项目金额： 82万元

中文摘要： 项目提出对宏观试件开展多载荷模式、机-热耦合材料微观力学性能原位测试新技术的研究命题。通过结构紧凑具有微/纳定位精度的驱动/传动单元、精巧的加载单元、内嵌的温控单元，结合检测、控制单元与算法程序，实现"拉伸/压缩-剪切-弯曲-压痕"多载荷模式、机-热耦合的材料微观力学性能测试，通过扫描电子显微镜高分辨率可视化原位监测加载过程中材料的变形行为、损伤机制与性能演变规律，为接近服役条件下材料微观力学性能测试与分析提供崭新的方法和手段。项目从实现多载荷模式、机-热耦合材料微观力学性能原位测试的原理与方法出发，着重研究多载荷模式加载、机-热加载、检测、控制、原位监测等基础理论与关键技术，研制集"驱动、加载、检测"等功能的原位测试平台，据此开展有意义的前沿研究。项目将为各类固态材料研制、结构设计、装备制造、寿命预测和可靠性评估提供基础，研究工作具有十分重要的科学意义，可望产生重大的社会效益和经济效益。

中文关键词： 微观力学性能；原位测试；变形损伤；多场耦合；接近服役条件

英文摘要： This project proposes a novel in situ testing technology to characterize micro-mechanical properties of sample materials with macro-scale under the multi-load mode and the thermo-mechanical coupling condition. Via the compact precision driving/transmission unit, novel loading unit, embedded temperature control unit, measuring/control unit and algorithm program, the developed platform can realized multi-load testing, including tension/compression, shear, bend and indentation test with micro/nano accuracy, and thermo-mechanical coupling mechanics testing of sample materials. What's more, the deformation and damage process of materials corresponding to the loads and multi-physical fields can be observed by the scanning electron microscope (SEM), which provides a new method to reveal deformation and damage mechanism of materials near the service condition. Based on the principle and method that can realize multi-load mode and multi-physical field coupling mechanics test, this project concentrates on the research of basic theories and key techniques of precision driving, thermo-mechanical coupling loading, measuring, controlling and in situ observation, and then develops the in situ testing platform with the functions of driving, loading and measuring. Via the developed platform, meaningful and frontier research will

英文关键词： micro mechanical property；in-situ test；deformation damage；multi-field coupling；near service condition