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公开(公告)号:US07546769B2
公开(公告)日:2009-06-16
申请号:US11291682
申请日:2005-12-01
申请人: Sivaramanivas Ramaswamy , Michael Francis Xavier Gigliotti , Vamshi Krishna Reddy Kommareddy , Richard Eugene Klaassen , Edward James Nieters , Mandayam Tondanur Shyamsunder , Michael Everett Keller , Nihat Kurkcu
发明人: Sivaramanivas Ramaswamy , Michael Francis Xavier Gigliotti , Vamshi Krishna Reddy Kommareddy , Richard Eugene Klaassen , Edward James Nieters , Mandayam Tondanur Shyamsunder , Michael Everett Keller , Nihat Kurkcu
IPC分类号: G01N29/00
CPC分类号: G01N29/11 , G01N3/56 , G01N29/0618 , G01N29/12 , G01N29/341 , G01N29/42 , G01N29/4445 , G01N29/4472 , G01N2203/0062 , G01N2203/0073 , G01N2203/0075 , G01N2203/0094 , G01N2203/0676 , G01N2291/0231 , G01N2291/02458 , G01N2291/02491 , G01N2291/0258 , G01N2291/02827 , G01N2291/2694 , G01S7/52038
摘要: A method and system for microstructural evaluation and degradation evaluation of an object are provided. The method comprises insonifying at least one subvolume of the object with ultrasonic energy at a fundamental frequency and acquiring receive energy from the object at the fundamental frequency and at least one harmonic frequency thereof. A nonlinearity parameter is determined using the receive energy. The nonlinearity parameter is then used to determine a grain size for the subvolume of the object and a variation of the grain size within the object. The nonlinearity parameter is also used to determine fatigue damage or a residual stress.
摘要翻译: 提供了一种用于对象的微结构评估和劣化评估的方法和系统。 该方法包括以基本频率的超声能量对目标物体的至少一个子体积进行增透,并以基频和至少一个谐波频率从物体获取接收能量。 使用接收能量确定非线性参数。 然后使用非线性参数来确定物体的子体积的晶粒尺寸和物体内的晶粒尺寸的变化。 非线性参数也用于确定疲劳损伤或残余应力。