Characterization Method of Materials Grain Size Based on Spectrum Energy
LI Min1, ZHOU Tong1, WANG Shan-chao1, XIAO Hui-fang2, XU Jin-wu1
1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. National Engineering Research Center of Flat Rolling Equipment, University of Science and Technology Beijing, Beijing 100083, China
Abstract：A method to characterize the grain size of the material by the spectrum energy of ultrasonic signals was proposed. In order to study the new method, firstly, some austenitic stainless steel materials with different grain sizes were prepared by different heat treatment regimes. Then the grain sizes of those prepared materials were characterized by using the attenuation coefficient, velocity and spectrum energy, respectively. The results show that attenuation coefficient calculated by the proposed method and the average grain size exhibit nonlinear relationship. The predicted error of the grain sizes is within 4%-15%, which is superior to the conventional methods, and verifies the effectiveness of the proposed method
 SUNDIN S, ARTYMOWICZ D. Direct measurements of grain size in low-carbon steels using the laser ultrasonic technique[J]. Metallurgical and Materials Transactions A,2002,33(3):687-691.
 MILITZER M, MOREAU A, MAALEKIAN M. Laser-ultrasonic austenite grain size measurements in low-carbon steels[J]. Materials Science Forum,2012,715:407-414.
 张婷,刘奎,王婷婷. 复合材料修理结构的缺陷特征与超声信号[J]. 航空材料学报,2015,35(1):66-70. ZHANG T, LIU K, WANG T T. Defect characteristics and ultrasonic signal of composite repair structure[J]. Journal of Aeronautical Materials,2015,35(1):66-70.
 PAPADAKIS E P. Ultrasonic attenuation and velocity in three transformation products in steel[J]. Journal of Applied Physics, 1964,35(5):1474-1482.
 KOPEC B, HANAK V. Using ultrasonic attenuation measurements to investigate anomalies in the structure of railway axles[J]. NDT International,1984,17(5):265-268.
 BOUDA A B, LEBAILI S, BENCHAALA A. Grain size influence on ultrasonic velocities and attenuation[J]. NDT & E International,2003,36(1):1-5.
 VNAL R, SARPVN IH, YALIM HA, et al. The mean grain size determination of boron carbide (B4C)-aluminium (Al) and boron carbide (B4C)-nickel (Ni) composites by ultrasonic velocity technique[J]. Materials Characterization,2006,56(3):241-244.
 AGHAIE-KHAFRI M, HONARVAR F, ZANGANEH S. Characterization of grain size and yield strength in AlSi 301 stainless steel using ultrasonic attenuation measurements[J]. Journal of Nondestructive Evaluation,2012,31(3):191-196.
 PALANICHAMY P, JOSEPH A, JAYAKUMAR T, et al. Ultrasonic velocity measurements for estimation of grain size in austenitic stainless steel[J]. NDT & E International,1995,28(3):179-185.
 陈建忠, 史耀武. 低碳钢晶粒尺寸的超声无损评价技术[J]. 无损检测,2002,(9):391-394. CHEN J Z, SHI Y W. Ultrasonic nondestructive evaluation of the grain size of low carbon steel[J]. Nondestructive Testing,2002,(9):391-394.
 SHARMA G K, KUMAR A, RAO C B, et al. Short time Fourier transform analysis for understanding frequency dependent attenuation in austenitic stainless steel[J]. NDT & E International,2013,53:1-7.
 张洪达,马世伟. Cr-Mo钢平均晶粒尺寸的超声无损评价[J]. 上海大学学报(自然科学版),2006,(2):162-165. ZHANG H D, MA S W. Ultrasonic nondestructive evaluation of average grain size of Cr-Mo steel[J]. Journal of Shanghai University(Natural Science Edition),2006,(2):162-165.
 BOUDA A B, ALJOHANI M S, MEBTOUCHE A, et al. Characterization of grains size by ultrasounds[J]. Key Engineering Materials,2011,(482):49-56.
 李萍,程向梅,李安娜,等. 304不锈钢固溶产物晶粒尺寸的超声无损表征研究[J].材料工程,2013,(6):77-81. LI P, CHENG X M, LI A N, et al. Ultrasonic nondestructive characterization of average grain size in 304 stainless steel solution treatment products[J]. Journal of Materials Engineering,2013,(6):77-81.
 PAPADAKIS E P. Ultrasonic attenuation caused by scattering in polycrystalline media[J]. Physical Acoustics,2012,4:269-328.
 王惠文,吴载斌,孟洁. 偏最小二乘回归的线性与非线性方法[M]. 北京:国防工业出版社,2006.