Quantification of stress history in type 304L stainless steel using positron annihilation spectroscopy
- Argonne National Laboratory, 9700 Cass Ave., Argonne, IL, 60439 (United States)
- Idaho State University, 921 S. 8th Avenue, Pocatello, ID, 83201 (United States)
- Positron Systems, Inc., 1500 Alvin Ricken Dr., Pocatello, ID, 83201-2783 (United States)
- Idaho National Laboratory, P.O. Box 1625, Idaho Falls, ID, 83415-6188 (United States)
Five Type 304L stainless steel specimens were subjected to incrementally increasing values of plastic strain. At each value of strain, the associated static stress was recorded and the specimen was subjected to positron annihilation spectroscopy (PAS) using the Doppler Broadening method. A calibration curve for the 'S' parameter as a function of stress was developed based on the five specimens. Seven different specimens (blind specimens labeled B1-B7) of 304L stainless steel were subjected to values of stress inducing plastic deformation. The values of stress ranged from 310 to 517 MPa. The seven specimens were subjected to PAS post-loading using the Doppler Broadening method, and the results were compared against the developed curve from the previous five specimens. It was found that a strong correlation exists between the 'S' parameter, stress, and strain up to a strain value of 15%, corresponding to a stress value of 500 MPa, beyond which saturation of the 'S' parameter occurs. Research Highlights: {yields} Specimens were initially in an annealed/recrystallized condition. {yields} Calibration results indicate positron annihilation measurements yield correlation. {yields} Deformation produced by cold work was likely larger than the maximum strain.
- OSTI ID:
- 22063673
- Journal Information:
- Materials Characterization, Vol. 62, Issue 4; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
- Country of Publication:
- United States
- Language:
- English
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