摘要
对不同热处理的16块纯钛样品进行电子背散射衍射(EBSD)实验获得微观组织信息。用激光超声纵波对样品进行检测,并用集成经验模态分解(EEMD)的方法对激光超声信号进行降噪。最后,提取信号频域衰减系数分别与EBSD实验的平均晶粒尺寸、Turner模型平均晶粒尺寸和对数正态分布1σ区间内平均晶粒尺寸进行拟合,建立纯钛的平均晶粒尺寸检测模型,衰减与晶粒尺寸更近似线性关系,模型的平均误差为12.33%、13.32%、13.64%。且当纯钛的平均晶粒尺寸大小相当时,晶粒尺寸分布对衰减存在影响,大晶粒晶粒数占比较高时,衰减也相应较大。
The microstructure information of 16 pure titanium samples with different heat treatments is obtained by electron back scatter diffraction(EBSD)experiments.The laser ultrasonic longitudinal wave is used to detect the sample,and the ensemble empirical mode decomposition(EEMD)method is used to reduce the noise of the laser ultrasonic signal.Finally,the attenuation coefficient of signal frequency domain is extracted and fitted to the average grain size of the EBSD experiment,the average grain size of Turner model and the average grain size in the 1σinterval of the lognormal distribution respectively,and the average grain size detection model of pure titanium is established.The attenuation has a more approximate linear relationship with the grain size and the average errors of the model are 12.33%,13.32%and 13.64%.When the average grain size of pure titanium is comparable,the grain size distribution has an influence on the attenuation,and when the number of large grains is higher,the attenuation is correspondingly higher.
作者
徐亚诚
殷安民
宋雪勇
余卉卉
徐值
张泽文
张巨豪
XU Ya-cheng;YIN An-min;SONG Xue-yong;YU Hui-hui;XU Zhi;ZHANG Ze-wen;ZHANG Ju-hao(School of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,China;Zhejiang Provincial Key Laboratory of Part Rolling Technology Research,Ningbo 315211,China;Ningbo Key Laboratory of Digital Manufacturing Technology,Ningbo 315211,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2022年第11期1606-1614,共9页
Laser & Infrared
基金
国家自然科学基金项目(No.51805279)
浙江省自然科学基金项目(No.Y21E050021)
宁波市“科技创新2025”重大专项(No.2020Z110)
浙江省教育厅一般科研项目(No.Y202045622)资助。
关键词
激光超声
纯钛
晶粒尺寸
集成经验模态分解
晶粒尺寸分布
laser ultrasonic
pure titanium
grain size
ensemble empirical mode decomposition(EEMD)
grain size distribution
作者简介
徐亚诚(1997-),男,硕士生,主要从事激光超声无损检测技术研究。E-mail:3063527816@qq.com;通讯作者:殷安民(1984-),男,副教授,博士,主要从事激光超声无损检测技术,金属材料组织性能控制与优化研究。E-mail:yinanmin@nbu.edu.cn。
