基于频谱能量的材料晶粒尺寸表征方法  

Characterization Method of Materials Grain Size Based on Spectrum Energy

作　　者：黎敏[1] 周通[1] 王善超[1] 肖会芳[2] 徐金梧[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]北京科技大学国家板带生产先进装备工程技术研究中心,北京100083

出　　处：《材料工程》2015年第12期69-74,共6页Journal of Materials Engineering

基　　金：北京高等学校青年英才计划资助项目(YETP0373);"十二五"国家科技支撑计划资助项目(2012BAF04B02)

摘　　要：研究了利用超声频谱能量对材料晶粒尺寸进行表征的方法。通过不同的热处理方式获得了不同晶粒尺寸的奥氏体不锈钢材料,再分别利用衰减系数法、声速法和频谱能量法对材料的晶粒尺寸进行表征。结果表明：频谱能量法得到的衰减系数与平均晶粒尺寸呈非线性关系,晶粒尺寸的预测误差在4%~15%以内,优于传统的分析方法,证明了新方法的有效性。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

关 键 词：超声检测 晶粒尺寸 衰减系数 声速 频谱能量 

分 类 号：TG115.28[金属学及工艺—物理冶金]