Abstract
An investigation to explore the feasibility of simultaneous application of infrared thermography (IRT) and digital image correlation (DIC) for analysis of Lüders deformation is carried out. Physical models and proposed concepts explaining the dynamics of deformation localization associated with Lüders band phenomenon addressing band-formation mechanism, inhomogeneity in stress-strain distribution across the band front, and strain localization following band front propagation are successfully correlated with the thermal and strain evolutions obtained using IRT and DIC. The studies revealed the potential of using these techniques simultaneously in providing an enhanced understanding of micro mechanisms involved in Lüders deformation based on associated macroscopic thermal and strain evolutions in a noncontact, nondestructive manner.
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Acknowledgments
The authors would like to thank Elsevier Ltd for giving permission to use Fig. 3 and 8. The constant support and encouragement received from Shri B. Ananthapadmanaban, Head, QAD, IGCAR (India) is gratefully acknowledged. N. Srinivasan would like to thank Mr. S. Raviprakash, Pyrodynamics (India) for his discussions on the DIC results. The authors also acknowledge the experimental assistance extended by Mr. Sukumar, PIED, IGCAR (India) and Mrs. D. Chitra, QAD, IGCAR (India).
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Nagarajan, S., Narayanaswamy, R. & Balasubramaniam, V. An Insight into Lüders Deformation Using Advanced Imaging Techniques. J. of Materi Eng and Perform 22, 3085–3092 (2013). https://doi.org/10.1007/s11665-013-0586-z
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DOI: https://doi.org/10.1007/s11665-013-0586-z