Startseite Effect of notch-depth ratio on intermittent electromagnetic radiation from Cu-Ni alloy under tension
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Effect of notch-depth ratio on intermittent electromagnetic radiation from Cu-Ni alloy under tension

  • Ranjana Singh , Shree P. Lal und Ashok Misra
Veröffentlicht/Copyright: 30. August 2019
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Materials Testing
Aus der Zeitschrift Materials Testing Band 61 Heft 9

Abstract

This paper presents some experimental results on the effect of the notch–depth ratio on intermittent electromagnetic radiation during the progressive plastic deformation of a Cu-Ni alloy sheet specimen under tension. An electromagnetic antenna was used for receiving the electromagnetic waves emitted by the deforming specimen. The specimens (with varied notch-depth ratios) first emit electromagnetic radiation near yield which is always oscillatory in nature. However, the axial strain at the initial emission of the electromagnetic radiation increases with an increase in the notch-depth ratio. The nature of electromagnetic radiation signals changes from oscillatory to exponential until instability is reached. This shows that the viscous coefficient of the material of the specimens increases during strain-hardening. The paper also presents a correlation between electromagnetic radiation emission parameters and the radius of the plastic zone created ahead of the advancing crack tip, an important parameter in fracture mechanics. With an increase in the plastic zone size, the amount of intermittent electromagnetic radiation decreases asymptotically: the first electromagnetic radiation amplitude increases linearly and a maximum energy burst first decreases the electromagnetic radiation frequency parabolically. Initial electromagnetic radiation characteristics differ considerably from optimum electromagnetic radiation emissions within the strain-hardening region. These experimental results show a novel technique for studying various fracture mechanics parameters and also for developing a non-contact crack growth monitor.

∗Correspondence Address, Ranjana Singh, Mukesh Patel School of Technology, Management and Engineering, Department of Mechanical Engineering, Mumbai 400056, India, E-mail:

Dr. Ranjana Singh, born in 1974, studied Mechanical Engineering at M. I. T. Muzaffarpur, India and received a Master's in Engineering at the Birla Institute of Technology (B. I. T.), Ranchi, India in 2004. She completed her PhD thesis at the same institute in 2018 on the correlation between electromagnetic radiation and plastic deformation in metals and alloys. Currently, she is working as an Assistant Professor at MPSTME, Mumbai, India. Prior to this, she also taught Mechanical Engineering students at Amity University, Noida, India. She has been pursuing her research interest in the field of metal physics & material engineering for over 10 years.

Dr. S. P. Lal, born in 1962, studied Production Engineering at B. I. T. Mesra, India and completed his PhD at the same institute in 2007. Currently, he is working as a Professor at B. I. T. Patna. Additionally, he also held the positions of Deputy Director (2008–2013) and Director at B. I. T., Patna (2013–2017). He has also worked as an Associate Professor at B. I. T., Bahrain in 1999 and 2003 and project manager at Hindalco and Orient Paper Industries Limited for 15 years.

Dr. Ashok Misra, born in 1946; graduated in Mechanical Engineering from Birla Institute of Technology (B. I. T.), Ranchi, India in 1967; D.Sc. from Birla Institute of Technology Ranchi in 1980. He retired as Emeritus Professor from B. I. T. Ranchi in 2012. He has been an acclaimed researcher in the field of metal physics. His work on studying the electromagnetic effects at metallic fracture was first published in Nature in 1975.

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Published Online: 2019-08-30
Published in Print: 2019-08-30

© 2019, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. In situ computed tomography for the characterization of the fatigue damage development in glass fiber-reinforced polyurethane
  5. Phase evolution of surface-modified Incoloy 825 superalloy using pack aluminization
  6. Material qualification of a 13Cr-L80 casing for sour conditions
  7. Influence of processing parameters on the fatigue life time of specimens made from quenched and tempered steel SAE 4140H
  8. Impact of notch geometry on dynamic strength of materials
  9. Hygrothermal environment effects on mechanical properties of T700/3228 CFRP laminates
  10. Effect of austenitizing temperature on the microstructure evolution and properties of Cu-bearing CADI
  11. Characterization of the boron layer formed by pack boronizing of binary iron-niobium alloys
  12. Corrosion inhibition of steel in a sodium chloride solution by natural honey
  13. Effect of notch-depth ratio on intermittent electromagnetic radiation from Cu-Ni alloy under tension
  14. Physical, mechanical and thermal behavior of recycled agro waste GSA reinforced green composites
  15. Effects of multi-pass cutting during wire electrical discharging
  16. Effects of thrust force variation during the drilling of pure and chemically treated Kevlar based polymer composites
  17. Dynamic mechanical and fracture morphology of kevlar fiber filled groundnut reinforced epoxy composites
https://doi.org/10.3139/120.111402

Artikel in diesem Heft

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. In situ computed tomography for the characterization of the fatigue damage development in glass fiber-reinforced polyurethane
  5. Phase evolution of surface-modified Incoloy 825 superalloy using pack aluminization
  6. Material qualification of a 13Cr-L80 casing for sour conditions
  7. Influence of processing parameters on the fatigue life time of specimens made from quenched and tempered steel SAE 4140H
  8. Impact of notch geometry on dynamic strength of materials
  9. Hygrothermal environment effects on mechanical properties of T700/3228 CFRP laminates
  10. Effect of austenitizing temperature on the microstructure evolution and properties of Cu-bearing CADI
  11. Characterization of the boron layer formed by pack boronizing of binary iron-niobium alloys
  12. Corrosion inhibition of steel in a sodium chloride solution by natural honey
  13. Effect of notch-depth ratio on intermittent electromagnetic radiation from Cu-Ni alloy under tension
  14. Physical, mechanical and thermal behavior of recycled agro waste GSA reinforced green composites
  15. Effects of multi-pass cutting during wire electrical discharging
  16. Effects of thrust force variation during the drilling of pure and chemically treated Kevlar based polymer composites
  17. Dynamic mechanical and fracture morphology of kevlar fiber filled groundnut reinforced epoxy composites
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