TY - JOUR
T1 - Effect of pre-exposure to water on the acoustic emission behavior of 2091-T3 Al-Li alloy
AU - Zeides, Felix
AU - Roman, Itzhak
PY - 1991
Y1 - 1991
N2 - The effect of pre-exposure to water with imposed weak ultrasonic field on the acoustic emission (AE) behavior of 2091-T3 Al-Li alloy was studied. AE characteristics were evaluated during tensile deformation utilizing a micro-computer based system and an rms voltmeter. Two types of AE were observed; initially, AE was of a continuous nature with a maximum at the yield, followed by a change to burst type AE coinciding with the onset of PLC serrations. A significant difference in AE behavior between as-received and pre-exposed material has been observed, especially in the yield region. The pre-exposed specimens gave rise to more intense AE activity manifested in higher peak amplitude AE events. Although the precise mechanism of the observed effect is not known, it is believed to stem from hydrogen charging that took place during pre-exposure, and which also caused reduction of the tensile elongation of the material.
AB - The effect of pre-exposure to water with imposed weak ultrasonic field on the acoustic emission (AE) behavior of 2091-T3 Al-Li alloy was studied. AE characteristics were evaluated during tensile deformation utilizing a micro-computer based system and an rms voltmeter. Two types of AE were observed; initially, AE was of a continuous nature with a maximum at the yield, followed by a change to burst type AE coinciding with the onset of PLC serrations. A significant difference in AE behavior between as-received and pre-exposed material has been observed, especially in the yield region. The pre-exposed specimens gave rise to more intense AE activity manifested in higher peak amplitude AE events. Although the precise mechanism of the observed effect is not known, it is believed to stem from hydrogen charging that took place during pre-exposure, and which also caused reduction of the tensile elongation of the material.
UR - http://www.scopus.com/inward/record.url?scp=0025782191&partnerID=8YFLogxK
U2 - 10.1520/stp19095s
DO - 10.1520/stp19095s
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.conferencearticle???
AN - SCOPUS:0025782191
SN - 1040-3094
SP - 213
EP - 217
JO - ASTM Special Technical Publication
JF - ASTM Special Technical Publication
IS - 1077
T2 - Symposium on Acoustic Emission: Current Pratice and Future Directions
Y2 - 20 March 1989 through 23 March 1989
ER -