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Amoranto Trisnobudi
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Journal : Mesin

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ANALISIS FREKUENSI PADA UJI TAK MERUSAK ULTRASONIK Trisnobudi, Amoranto
Mesin Vol 20, No 2 (2005)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1148.762 KB)

Abstract

In ultrasonic nondestructive testing an ultrasonic wave is usually radiated through a material by a transducer. If there is a flaw inside the material, reflected or diffracted waves caused by the interaction between the ultrasonic wave and the flaw, are received by the same or another transducer. The received signals must be processed in order to obtain information about the flaw characteristics. For the flaw which perpendicular to the beam wave, the flaw size can be determined by amplitude analysis, for example by using DGS (Distance Gain Scale) diagram. The oblique flaw can be characterized by time analysis such as Time of Flight Diffraction (TOFD) method. But if the flaw is small or there is a large enough noise, frequency analysis must be used. This paper deals with the two methods using frequency analysis, i.e. ultrasonic spectroscopy and split spectrum processing, to overcome the above problems.
METODA ULTRASONIK UNTUK MENENTUKAN ARAH KRISTAL TUNGGAL BERSTRUKTUR KUBIK Trisnobudi, Amoranto; Sugiharto, Benny
Mesin Vol 15, No 2 (2000)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (441.843 KB)

Abstract

Single crystal direction can be determined by x-ray diffraction. The determination of this crystal direction can also be carried out by using ultrasonic method. In this method the ultrasonic wave velocity propagating through the crystal is measured. From this velocity measurement then the crystal direction can be determined. This paper deals with the results of a research about the direction determination of cubic single crystal using ultrasonic wave. There are two methods used, namely graphical method and computer method. These two methods used the same data, i.e. velocity data for all possible direction that has been calculated based on the wave and elasticity theory. In the first method, the data are stored as several graphics whereas in the second method they are stored as database in a computer program. These two methods have shown the same results in aluminum for crystal directions [311], [331], [661], [631] and [611] where the computer method can be carried out quicker than the graphical method.
METODA ULTRASONIK UNTUK MENENTUKAN ARAH KRISTAL TUNGGAL BERSTRUKTUR KUBIK Amoranto Trisnobudi; Benny Sugiharto
Mesin Vol. 15 No. 2 (2000)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Single crystal direction can be determined by x-ray diffraction. The determination of this crystal direction can also be carried out by using ultrasonic method. In this method the ultrasonic wave velocity propagating through the crystal is measured. From this velocity measurement then the crystal direction can be determined. This paper deals with the results of a research about the direction determination of cubic single crystal using ultrasonic wave. There are two methods used, namely graphical method and computer method. These two methods used the same data, i.e. velocity data for all possible direction that has been calculated based on the wave and elasticity theory. In the first method, the data are stored as several graphics whereas in the second method they are stored as database in a computer program. These two methods have shown the same results in aluminum for crystal directions [311], [331], [661], [631] and [611] where the computer method can be carried out quicker than the graphical method.
ANALISIS FREKUENSI PADA UJI TAK MERUSAK ULTRASONIK Amoranto Trisnobudi
Mesin Vol. 20 No. 2 (2005)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In ultrasonic nondestructive testing an ultrasonic wave is usually radiated through a material by a transducer. If there is a flaw inside the material, reflected or diffracted waves caused by the interaction between the ultrasonic wave and the flaw, are received by the same or another transducer. The received signals must be processed in order to obtain information about the flaw characteristics. For the flaw which perpendicular to the beam wave, the flaw size can be determined by amplitude analysis, for example by using DGS (Distance Gain Scale) diagram. The oblique flaw can be characterized by time analysis such as Time of Flight Diffraction (TOFD) method. But if the flaw is small or there is a large enough noise, frequency analysis must be used. This paper deals with the two methods using frequency analysis, i.e. ultrasonic spectroscopy and split spectrum processing, to overcome the above problems.
Co-Authors B Suwandhika Bambang Haryanto Benny Sugiharto Deddy Kurniadi Enung Rosihan Nugraha I Wayan Budiastra K. Ain Ni Made D. Ryaumariastini Sugiharto, Benny Tjia Liong Hoei