摘要
巴氏噪声分析(BNA)是一种检测铁磁材料微观应力及金相组织的独特方法。本文对巴氏噪声的应用实例作了详细分析,表明BNA是评估材料残余应力、硬度、疲劳寿命、屈服强度以及测量磨削烧伤和热处理缺陷的一种快速、准确方法。巴氏噪声分析仪的问世为金属表面的无损测试及质量评估开辟了新的领域。
Barkhausen noise analysis (BNA) is a distinctive measure for testing microscopic stresses and metallurgical structure in ferromagnetic materials. Practical applications of Barkhausen noise show that BNA is a fast and precise method for evaluating residual stress, hardness, fatigue life and yield strength,and for detecting defects such as heat treatment faults and grinding burns. BNA instrument has opened a way for nondestructive testing and quality assurance of metallic surfaces.
出处
《无损检测》
北大核心
1994年第2期41-43,共3页
Nondestructive Testing
