摘要
在人类社会发展的过程中,金属材料必不可少,继而金属材料的高温特性已成为不少工程中的热点。针对目前金属材料高温评价方法的取样范围有限、试验周期较长、具有破坏性等缺点,研究了新型无损检测与评估技术,为金属材料高温特性的研究提供了更科学的方法手段。由于材料在不同温度下的组织状态不同,引起基体力学性能的连续性产生变化,这使得超声波在材料中的传播速度、衰减系数等参量发生改变。采用脉冲回波法对金属材料T2紫铜进行高温单点采集实验,通过对回波信号进行渡越时间算法处理,用MATLAB绘图得出声速和幅值衰减随温度变化的曲线图。研究结果表明,获取的温度特性曲线图特征与材料固有特性相吻合。由此得出结论,超声表征方法可为金属材料的研制、生产、加工及高温使用提供一种辅助评价手段。
In the process of human society development, metal materials are indispensable, and then the high temperature characteristics of metal materials have become a hot spot in many projects. Aiming at the shortcomings of the high temperature evaluation method of metal materials, such as limited sampling range, long test period and destructiveness, the new non-destructive testing and evaluation technology is researched, which provides a more scientific method for the study of high temperature characteristics of metal materials. Due to the different state of the material at different temperatures, the continuity of the mechanical properties of the matrix changes, which changes the parameters such as the propagation speed and attenuation coefficient of the ultrasonic wave in the material. The high-temperature single-point acquisition experiment of metal material T2 copper was carried out by pulse echo method. The echo signal was processed by the transit time algorithm, and the curve of sound velocity and amplitude attenuation with temperature was obtained by using MATLAB drawing. The results show that the acquired temperature characteristic curve characteristics are consistent with the inherent characteristics of the material, and it is concluded that the ultrasonic characterization method can provide an auxiliary evaluation method for the development, production, processing and high temperature use of metal materials.
作者
张琦
杨录
刘宇
Zhang Qi;Yang Lu;Liu Yu(National Key laboratory for Electronic Measurement Technology,college o￡Information and Communication Engineering,North University of China,Taiyuan 030051,China)
出处
《电子测量技术》
2019年第22期114-117,共4页
Electronic Measurement Technology
关键词
T2紫铜
高温特性
超声表征
渡越时间算法
T2 copper
high temperature characteristics
ultrasound characterization
transit time algorithms
作者简介
张琦,硕士研究生在读,主要研究领域为超声无损检测。E-mail:714075510@qq.com;杨录,硕士,副教授,主要研究领域为超声无损检测。E-mail:tyyanglu@qq.com;刘宇,硕士研究生在读,主要研究领域为超声无损检测。E-mail:1399053740@qq.com。
