{"title":"声学非线性参数对铝合金第二相析出的影响","authors":"P. Li, W. Yost, J. Cantrell, K. Salama","doi":"10.1109/ULTSYM.1985.198690","DOIUrl":null,"url":null,"abstract":"The acoustic n onlinearity parameter has been determined in the heat treatable aluminum alloys 6U61-T6, 2024-T4 and 7075-T551 using the ultrasonic harmonic generation technique . The measurements were made using a 10 MHz longitudinal u ltrasonic transducer for transmission and a capacitive transducer for the detection of the second harmonic. Preliminary results i ndicate a linear relationship between the n onlinearity parameter and the volume fraction of second phase precipitates in these alloys. This finding is consistent with the ordered dependence of the nonlinearity parameter on the molecular structure of cubic crystals for a given propagation mode. Independent measurements made of the acoustoelastic constants in the same alloys are found to exhibit a similar dependence o n second phase.","PeriodicalId":240321,"journal":{"name":"IEEE 1985 Ultrasonics Symposium","volume":"5 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"21","resultStr":"{\"title\":\"Dependence of Acoustic Nonlinearity Parameter on Second Phase Precipitates of Aluminum Alloys\",\"authors\":\"P. Li, W. Yost, J. Cantrell, K. Salama\",\"doi\":\"10.1109/ULTSYM.1985.198690\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The acoustic n onlinearity parameter has been determined in the heat treatable aluminum alloys 6U61-T6, 2024-T4 and 7075-T551 using the ultrasonic harmonic generation technique . The measurements were made using a 10 MHz longitudinal u ltrasonic transducer for transmission and a capacitive transducer for the detection of the second harmonic. Preliminary results i ndicate a linear relationship between the n onlinearity parameter and the volume fraction of second phase precipitates in these alloys. This finding is consistent with the ordered dependence of the nonlinearity parameter on the molecular structure of cubic crystals for a given propagation mode. Independent measurements made of the acoustoelastic constants in the same alloys are found to exhibit a similar dependence o n second phase.\",\"PeriodicalId\":240321,\"journal\":{\"name\":\"IEEE 1985 Ultrasonics Symposium\",\"volume\":\"5 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"21\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE 1985 Ultrasonics Symposium\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ULTSYM.1985.198690\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE 1985 Ultrasonics Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ULTSYM.1985.198690","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Dependence of Acoustic Nonlinearity Parameter on Second Phase Precipitates of Aluminum Alloys
The acoustic n onlinearity parameter has been determined in the heat treatable aluminum alloys 6U61-T6, 2024-T4 and 7075-T551 using the ultrasonic harmonic generation technique . The measurements were made using a 10 MHz longitudinal u ltrasonic transducer for transmission and a capacitive transducer for the detection of the second harmonic. Preliminary results i ndicate a linear relationship between the n onlinearity parameter and the volume fraction of second phase precipitates in these alloys. This finding is consistent with the ordered dependence of the nonlinearity parameter on the molecular structure of cubic crystals for a given propagation mode. Independent measurements made of the acoustoelastic constants in the same alloys are found to exhibit a similar dependence o n second phase.
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