Variation in electromagnetic radiation during plastic deformation under tension and compression of metals

Singh, Rohit; Lal, S. P.; Misra, A. K.

doi:10.1007/s00339-014-8509-x

Cited by 15 publications

(4 citation statements)

References 24 publications

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“…EMR emission parameters during plastic deformation in tension differed significantly from those seen in compression [15]. A smooth correlation was observed between the EMR emission, grain size, and lattice constant [16,17].…”

Section: Introductionmentioning

confidence: 82%

“…Figure 3 shows the stress-strain plot depicting the stages of intermittent EMR emission for 2a/w = 0.33. The EMR signal for various metallic materials [13][14][15][16][17][18][19] exhibits exponential decaying and damped oscillating characteristics. Figure 4a shows the first EMR emission signal near yielding for 2a/w = 0.33, indicating an oscillating damping nature.…”

Section: Influence Of 2a/w On Emr Signal Characteristicsmentioning

confidence: 99%

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Influence of an Engineered Notch on the Electromagnetic Radiation Performance of NiTi Shape Memory Alloy

Anand,

Kumar,

Pandey

et al. 2024

Materials

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This work explores the influence of a pre-engineered notch on the electromagnetic radiation (EMR) parameters in NiTi shape memory alloy (SMA) during tensile tests. The test data showed that the EMR signal fluctuated between oscillatory and exponential, signifying that the specimen’s viscosity damping coefficient changes during strain hardening. The EMR parameters, maximum EMR amplitude, and average EMR energy release rate remained constant initially but rose sharply with the plastic zone radius with progressive loading. It was postulated that new Frank–Read sources permit dislocation multiplication and increase the number of edge dislocations participating in EMR emissions, leading to a rise in the value of EMR parameters. The study of the correlation between EMR emission parameters and the plastic zone radius before the crack tip is a vital crack growth monitoring tool. An analysis of the interrelationship of the EMR energy release rate at fracture with the elastic strain energy release rate would help develop an innovative approach to assess fracture toughness, a critical parameter for the design and safety of metals. The microstructural analysis of tensile fractures and the interrelation between deformation behaviours concerning the EMR parameters offers a novel and real-time approach to improve the extant understanding of the behaviour of metallic materials.

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Section: Introductionmentioning

confidence: 82%

Section: Influence Of 2a/w On Emr Signal Characteristicsmentioning

confidence: 99%

Influence of an Engineered Notch on the Electromagnetic Radiation Performance of NiTi Shape Memory Alloy

Anand,

Kumar,

Pandey

et al. 2024

Materials

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“…during tension and compression of metals. The intermittent EMR signals are found to be generally of oscillatory or exponential nature except a few which have shown random variations [183]. Singh et al in 2019 have studied the effect of notch/depth ratio on the EMR emission from tensile test specimens made up of Cu-Ni alloy.…”

Section: Electromagnetic Effects In Metals and Alloysmentioning

confidence: 99%

A review on deformation-induced electromagnetic radiation detection: history and current status of the technique

2020

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Development of the deformation monitoring techniques for the infrastructures so as to avoid catastrophic failure and resulting economic/human loss has remained a key interest of scientists and engineers. Among various deformation monitoring techniques utilized and explored by groups of researchers, electromagnetic radiation detection is one of the intriguing techniques which has remained popular in researchers’ community till today. Almost every type of material is being explored and studied by researchers for the electromagnetic emissions when subjected to external loading and/or failure. Experimental and theoretical investigations are demonstrating these emissions to be a suitable candidate for the deformation monitoring, as a failure predictor and to know about the complex phenomenon of fracture. This article presents extensive literature review and a rigorous discussion on the work done in the past several decades regarding the exploration of electromagnetic emissions from a wide variety of materials and the underlying physical mechanisms. Thus, this review is an attempt to highlight main findings, proposed physical mechanisms, prospective applications, future scope and challenges of the electromagnetic emission detection technique.

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“…In ar ecentp aper, Singh et al [12] have reported some experimental results on metals which show that the EMR emission characteristics duringp lasticd eformation under tension are considerably different in nature than those under compression. Also,t he EMRe mission parameters show smooth correlationw ith the angular Debye frequency and electron specific heat constant of metals.…”

Section: Introductionmentioning

confidence: 97%

Correlation of plastic deformation induced intermittent electromagnetic radiation characteristics with mechanical properties of Cu–Ni alloys

Singh

Lal

Misra

2015

International Journal of Materials Research

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This paper presents experimental results on intermittent electromagnetic radiation during plastic deformation of Cu -Nialloys under tension and compression modes of deformation. On the basis of the nature of electromagnetic radiation signals, oscillatory or exponential, results show that the compression increases the viscous coefficient of Cu -Ni alloys duringp lastic deformation. Increasingt he percentage of solute atoms in Cu -Nialloys makes electromagnetic radiation strength higher under tension. The electromagnetic radiation emission occurs at smaller strains under compression showing early onset of plasticd eformation. This is attributed to the role of high corer egion tensile residual stresses in the rolled Cu -Nialloy specimensinaccordancew itht he Bauschinger effect. The distance between the apexes of the dead metalcones duringcompression playsas ignificant role in electromagnetic radiation parameters. The dissociation of edge dislocations into partials and increase in internal stresseswith increase in solute percentage in Cu -Nia lloys under compression considerably influences the electromagnetic radiation frequency.R. Singh et al.: Correlation of deformation induced electromagnetic radiation with mechanical properties of Cu -Nialloys Int.

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Variation in electromagnetic radiation during plastic deformation under tension and compression of metals

Cited by 15 publications

References 24 publications

Influence of an Engineered Notch on the Electromagnetic Radiation Performance of NiTi Shape Memory Alloy

Influence of an Engineered Notch on the Electromagnetic Radiation Performance of NiTi Shape Memory Alloy

A review on deformation-induced electromagnetic radiation detection: history and current status of the technique

Correlation of plastic deformation induced intermittent electromagnetic radiation characteristics with mechanical properties of Cu–Ni alloys

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