The Lüders’ front and a previously discovered optical interferometric band structure were observed simultaneously in steel specimens under tensile loading. The observed Lüders’ front and optical band structure show the same propagation characteristics, confirming our previous interpretation that the optical band structure represents the plastic deformation front. Analysis shows that the stress at which the optical band structure begins to appear is approximately 10% lower than the corresponding Lüders’ front, indicating that the optical band structure reveals the plastic deformation front with higher sensitivity than the Lüders’ front.
Issue Section:Technical Briefs
Keywords:steel, plastic deformation, tensile strength, light interferometry
Topics:Deformation, Stress, Steel
A., 1996, “
Dircet Observation of Developed Plastic Deformation and Its Application to Nondestructive Testing,”
Jpn. J. Appl. Phys., Part 20021-4922
O. J., 1993 “
Recent Development in Video Speckle Interferometry,” in
Speckle Metrology, edited by
Dekker, New York, USA, pp.
E. O., 1970,
Yield point phenomena in metals and alloys,
Plenum Press, New York.
A., 1997, “
Optical Interferometry Applied to Analyze Deformation and Fracture of Aluminum Alloys,”
Theor. Appl. Fract. Mech.0167-8442
K., 1999, “
Detection of the Failure Zone Caused by Cyclic Loading,”
J. Intell. Mater. Syst. Struct.1045-389X,
E. O., 1951, “
The Deformation and Ageing of Mild Steel,”
Proc. Phys. Soc. London, Sect. B0370-1301
Y., 2002, “
The Observation of Yielding Region of the Circular Hole Vicinity under the Gradually Increase Cyclic Loading and Application of ESPI in the Failure Region of Low Carbon Steel,” Master’s thesis, Tokyo Denki University, Tokyo, Japan, p.
E. T., and
A., 1995, “
Phase Evaluation for Electronic Speckle-Pattern Interferometry Deformation Analysis,”
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