文章信息/Info

Title:

Development and Application of In-Situ Testing Machines Based on High Resolution Three-Dimensional Tomography

文章編號(hào):

16743962(2021)02009015

作者:

虞雨洭; 吳正凱; 吳圣川

（西南交通大學(xué) 牽引動(dòng)力國家重點(diǎn)實(shí)驗(yàn)室，四川 成都 610031）

Author(s):

YU Yukuang;  WU Zhengkai;  WU Shengchuan

(State Key Laboratry of Traction Power, Southwest Jiaotong University,Chengdu 610031, China)

關(guān)鍵詞:

同步輻射光源; X射線三維成像; 原位疲勞試驗(yàn)機(jī); 微結(jié)構(gòu)損傷演化; 疲勞裂紋萌生

Keywords:

synchrotron radiation source;  X-ray 3D tomography;  in-situ fatigue machine;  microstructual damage evolution;  fatigue crack initiation

分類號(hào):

TH871

DOI:

10.7502/j.issn.1674-3962.202007031

文獻(xiàn)標(biāo)志碼:

A

摘要:

先進(jìn)材料及結(jié)構(gòu)的損傷表征和在役性能評(píng)價(jià)是重大裝備研發(fā)與服役中的關(guān)鍵科學(xué)問題。目前，依托同步輻射大科學(xué)裝置的X射線三維成像技術(shù)在金屬材料細(xì)觀損傷力學(xué)行為研究方面具有獨(dú)特優(yōu)勢(shì)，而兼容于同步輻射光源相應(yīng)光束線站的各類原位加載裝置對(duì)材料內(nèi)部微結(jié)構(gòu)損傷演化的動(dòng)態(tài)高分辨表征具有重要意義。簡要介紹了國內(nèi)外依托世界各大高性能光源的原位加載試驗(yàn)機(jī)研制進(jìn)展與應(yīng)用成果，重點(diǎn)闡述了可實(shí)現(xiàn)單向拉壓、循環(huán)加載及具備極寒、高溫、真空等樣品環(huán)境的基于同步輻射X射線成像的原位加載裝置的設(shè)計(jì)原理及結(jié)構(gòu)特點(diǎn)。最后，結(jié)合第三代高能X射線三維成像技術(shù)特點(diǎn)、先進(jìn)光源線站建設(shè)、高通量試驗(yàn)要求等，對(duì)材料原位加載條件下的高時(shí)空分辨率動(dòng)態(tài)成像進(jìn)行了展望，指出開發(fā)集拉伸、壓縮、低周疲勞、高周疲勞和超高周疲勞加載機(jī)構(gòu)于一體的多功能原位試驗(yàn)機(jī)是一項(xiàng)重要的工作。

Abstract:

Damage characterization and in-service performance assessment of advanced materials and structures are the critical scientific issues for manufacturing and operation of the critical equipment. Currently, the synchrotron radiation X-ray three-dimensional (3D) computed micro tomography shows great potential in studying the meso-damage mechanics of metals, and various in-situ loading machines compatibly mounted on the synchrotron radiation beamlines play a significant role in the real-time and high-resolution characterization of the microstructural damage evolution of advanced materials. This paper summaries the development and application of the in-situ loading devices based on the high-energy synchrotron radiation sources. The design principles and structures of in�瞫itu loading rigs which allow monotonic or cyclic deformation exposed to low or high temperature and vacuum environments are presented in detail. Finally, it is significant to dynamically image the damage evolution with the high spatio-temporal resolution by a combination of the imaging characteristics of the third�瞘eneration synchrotron radiation sources, beamline construction of the advanced synchrotron radiation sources and high�瞭hroughput experiments. Particularly, to develop the multifunctional in-situ loading system integrating the uniaxial tensile or compression, low cycle fatigue, high cycle fatigue and super high cycle fatigue is an important work.