E. Papadakis, R. Thompson, D. Bluhm, S.J. Wormley, H.D. Skank, K. Forouraghi, G. Alers
{"title":"预测金属薄板拉伸性的超声波仪器","authors":"E. Papadakis, R. Thompson, D. Bluhm, S.J. Wormley, H.D. Skank, K. Forouraghi, G. Alers","doi":"10.1109/ULTSYM.1990.171514","DOIUrl":null,"url":null,"abstract":"An ultrasonic instrument has been designed and fabricated to predict drawability of sheet metal. Using S/sub 0/ mode Lamb waves generated and detected by EMATs (electromagnetic-acoustic transducers), the instrument automatically measures ultrasonic phase delay in three directions: 0 degrees , 45 degrees , and 90 degrees with respect to the rolling direction. The delay is measured by a Fourier transform phase-versus-frequency slope algorithm applied to flash AD recorded EMAT signals. From the delays, the computer-based instrument calculates velocities and the directional Young's modulus E(O) in the rolling plane. From the average E in the plane, a correlation curve is used to find the average plastic strain ratio, which is the drawability prediction parameter.<<ETX>>","PeriodicalId":412254,"journal":{"name":"IEEE Symposium on Ultrasonics","volume":"105 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1990-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":"{\"title\":\"Ultrasonic instrument to predict drawability of sheet metal\",\"authors\":\"E. Papadakis, R. Thompson, D. Bluhm, S.J. Wormley, H.D. Skank, K. Forouraghi, G. Alers\",\"doi\":\"10.1109/ULTSYM.1990.171514\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"An ultrasonic instrument has been designed and fabricated to predict drawability of sheet metal. Using S/sub 0/ mode Lamb waves generated and detected by EMATs (electromagnetic-acoustic transducers), the instrument automatically measures ultrasonic phase delay in three directions: 0 degrees , 45 degrees , and 90 degrees with respect to the rolling direction. The delay is measured by a Fourier transform phase-versus-frequency slope algorithm applied to flash AD recorded EMAT signals. From the delays, the computer-based instrument calculates velocities and the directional Young's modulus E(O) in the rolling plane. From the average E in the plane, a correlation curve is used to find the average plastic strain ratio, which is the drawability prediction parameter.<<ETX>>\",\"PeriodicalId\":412254,\"journal\":{\"name\":\"IEEE Symposium on Ultrasonics\",\"volume\":\"105 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1990-12-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Symposium on Ultrasonics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ULTSYM.1990.171514\",\"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 Symposium on Ultrasonics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ULTSYM.1990.171514","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Ultrasonic instrument to predict drawability of sheet metal
An ultrasonic instrument has been designed and fabricated to predict drawability of sheet metal. Using S/sub 0/ mode Lamb waves generated and detected by EMATs (electromagnetic-acoustic transducers), the instrument automatically measures ultrasonic phase delay in three directions: 0 degrees , 45 degrees , and 90 degrees with respect to the rolling direction. The delay is measured by a Fourier transform phase-versus-frequency slope algorithm applied to flash AD recorded EMAT signals. From the delays, the computer-based instrument calculates velocities and the directional Young's modulus E(O) in the rolling plane. From the average E in the plane, a correlation curve is used to find the average plastic strain ratio, which is the drawability prediction parameter.<>
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