Time lapse in situ X-ray imaging of failure in structural materials under cyclic loads and extreme environments  

作　　者：Weijian Qian Shengchuan Wu Liming Lei Qiaodan Hu Changkui Liu 

机构地区：[1]State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031,China [2]Taihang Laboratory,Chengdu 610213,China [3]School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [4]AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China

出　　处：《Journal of Materials Science & Technology》2024年第8期80-103,共24页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.U2032121,12192212,and 52325407).

摘　　要：Damage evolution characterization and performance evaluation under realistic conditions are essential to ensure reliable operation of critical safety components.However,previous studies focus on the surface detection because of very limited penetration capacity of nondestructive testing facilities.Here,we review the recent progress of material damage mechanism by various in situ testing rigs that are compat-ible with laboratory and synchrotron radiation X-ray facilities.Then,taking metallic alloys and composites as model materials,we demonstrate the unique advantages of in situ X-ray three-dimensional tomography in unveiling complex failure mechanisms,quantifying crack growth driving forces and crack closure phenomena,and elucidating the strengthening/degrading effects from microstructure and environment on structural material degradation.Finally,we also discuss the ongoing direction of in situ multi-scale visualization and characterization with the development of advanced high-energy X-ray facilities,the improvement of in situ devices and sample environments,the demand of high-throughput tests,and the processing and application of massive test data.

关 键 词：In situ experiments Fatigue damage mechanism Correlative characterization X-ray computed tomography Lightweight structural materials 

分 类 号：TG14[一般工业技术—材料科学与工程] TB33[金属学及工艺—金属材料]