Article Article
Monitoring of Elastoplastic Fracture Behavior of HSLA Steel Using Acoustic Emission Testing

The present study explores using acoustic emission testing (AE) to monitor the elastoplastic fracture toughness (JIC) of high-strength, low-alloy (HSLA) steel in two different orientations. Acoustic emission signals generated during the tests were found to be higher during bulk yielding upon initial loading, after which they decreased during intermediate loading before increasing again. The acoustic emission signals generated were used to correlate with the JIC values determined from unloading compliance tests. The point of crack initiation estimated by AE is lower than that determined by the unloading compliance tests. Beyond the point of crack initiation determined by AE, the acoustic emission signals generated increased rapidly, which is attributed to crack growth. The results of AE during crack initiation are supported by the peak amplitude of the acoustic emission signals. The possibility of using AE data to estimate fracture toughness values has also been explored for HSLA steel.

DOI: https://doi.org/10.32548/2021.me-04137

References

Arii, M., H. Kashiwaya, and T. Yanuki, 1975, “Slow Crack Growth and Acoustic Emission Characteristics in COD Test,” Engineering Fracture Mechanics, Vol. 7, No. 3, pp. 551–552, https://doi.org/10.1016/0013-7944(75)90055-7

ASNT, 1987, Nondestructive Testing Handbook, Vol. 5: Acoustic Emission Testing, American Society for Nondestructive Testing, Columbus, OH

ASTM, 2001, ASTM E1820: ASTM Standard Test Method for Measurement of Fracture Toughness, ASTM International, West Conshohocken, PA

ASTM, 2003, ASTM E647: Standard Test Method for Measurement of Fatigue Crack Growth Rates, ASTM International, West Conshohocken, PA

Blanchette, Y., J.I. Dickson, and M.N. Bassim, 1984, “The Use of Acoustic Emission to Evaluate Critical Values of K and J in 7075-T651 Aluminum Alloy,” Engineering Fracture Mechanics, Vol. 20, No. 2, pp. 359–371, https://doi.org/10.1016/0013-7944(84)90140-1

Broek, D., 1978, Elementary Engineering Fracture Mechanics, second edition, Sijthoff & Noordhoff International Publishers, The Netherlands

Camerini, C.S., J.M.A. Rebello, and S.D. Soares, 1992, “Relationship Between Acoustic Emission and CTOD Testing for a Structural Steel,” NDT&E International, Vol. 25, No. 3, pp. 127–133, https://doi.org/10.1016/0963-8695(92)90352-H

Clark, G., and J.F. Knott, 1977, “Acoustic Emission and Ductile Crack Growth in Pressure Vessel Steels,” Metal Science, Vol. 11, No. 11, pp. 531–536, https://doi.org/10.1179/030634577790432802

Dal Re, V., 1986, “Fracture Toughness Measurement of a NiCrMoV Steel by Acoustic Emission,” Journal of Acoustic Emission, Vol. 5, No. 1, pp. 39–44

Long, X., G. Cai, and L.-E. Svensson, 1999, “Investigation of Fracture and Determination of Fracture Toughness of Modified 9Cr–1Mo Steel Weld Metals Using AE Technique,” Materials Science and Engineering: A, Vol. 270, No. 2, pp. 260–266, https://doi.org/10.1016/S0921-5093(99)00190-2

Mukhopadhyay, C.K., G. Sasikala, T. Jayakumar, and B. Raj, 2012, “Acoustic Emission during Fracture Toughness Tests of SA333 Gr.6 Steel,” Engineering Fracture Mechanics, Vol. 96, pp. 294–306, https://doi.org/10.1016/j.engfracmech.2012.08.004

Mukhopadhyay, C.K., K.K. Ray, T. Jayakumar, and B. Raj, 2000a, “The Influence of Notch on the Acoustic Emission Generated during Tensile Testing of Nuclear Grade AISI Type 304 Stainless Steel,” Materials Science and Engineering: A, Vol. 276, Nos. 1–2, pp. 83–90, https://doi.org/10.1016/S0921-5093(99)00512-2

Mukhopadhyay, C.K., K.K. Ray, T. Jayakumar, and B. Raj, 2000b, “Acoustic Emission–Stress Intensity Factor Relations for Tensile Deformation of Notched Specimens of AISI Type 304 Stainless Steel,” Materials Science and Engineering: A, Vol. 293, Nos. 1–2, pp. 137–145, https://doi.org/10.1016/S0921-5093(00)01042-X

Ohira, T., and Y.H. Pao, 1986, “Microcrack Initiation and Acoustic Emission during Fracture Toughness Tests of A5333B Steel,” Metallurgical Transactions A, Vol. 17, pp. 843–852, https://doi.org/10.1007/BF02643860

Rice, J.R., 1968, “A Path Independent Integral and the Approximate Analysis of Strain Concentration by Notches and Cracks,” Journal of Applied Mechanics, Vol. 35, No. 2, pp. 379–386, https://doi.org/10.1115/1.3601206

Roy, H., N. Parida, S. Sivaprasad, S. Tarafder, and K.K. Ray, 2008, “Acoustic Emissions during Fracture Toughness Tests of Steels Exhibiting Varying Ductility,” Materials Science and Engineering: A, Vol. 486, Nos. 1–2, pp. 562–571, https://doi.org/10.1016/j.msea.2007.09.036

Tronskar, J.P., M.A. Mannan, and M.O. Lai, 2003, “Application of Acoustic Emission for Measuring Crack Initiation Toughness in Instrumented Charpy Impact Testing,” Journal of Testing and Evaluation, Vol. 31, No. 3, pp. 222–233, https://doi.org/10.1520/JTE12420J

 

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