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Experimental Measurements of Interface Fracture Toughness Using Double Cantilever Bending

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Structural Integrity Assessment

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

Abstract

Fracture properties at the interface of hard and brittle Alumina (Al2O3) coating over a soft Al (Al 6061) substrate are studied using the double cantilever bend (DCB) test. These coatings were thermally sprayed and included substantial porosity. Elastic properties of the Alumina layer were determined by three-point bending (3PB) of the coated specimens. Fracture energy of Alumina was determined using a notched sample of the free-standing Alumina coating. FEM analysis of DCB was performed to estimate the stress intensity factor at the crack tip along the Al/Al2O3 interface. The experimental results show mixed mode fracture behaviour in most of the coatings. Average fracture energy of the interface, 6.46 J/m2, was estimated using these measurements.

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Acknowledgements

The authors would like to thank the Max Planck Partner Group Project for funding this study. The authors would like to duly acknowledge the FIST lab for Mechanical Testing, Metallurgical Engineering and Materials Science, IIT Bombay for providing the test facilities.

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Authors and Affiliations

  1. Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai, 400076, India

    Ashwini Kumar Mishra & Nagamani Jaya Balila

  2. Department of Materials Science and Engineering, Center for Thermal Spray Research, Stony Brook University, Stony Brook, NY, 11790, USA

    Sanjay Sampath & Gregory M. Smith

Authors
  1. Ashwini Kumar Mishra
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  2. Sanjay Sampath
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  3. Gregory M. Smith
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  4. Nagamani Jaya Balila
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Corresponding authors

Correspondence to Ashwini Kumar Mishra or Nagamani Jaya Balila .

Editor information

Editors and Affiliations

  1. Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India

    Raghu V. Prakash

  2. Reactor Design Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India

    R. Suresh Kumar

  3. Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India

    Atikukke Nagesha

  4. Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India

    Gomathy Sasikala

  5. Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India

    Arun Kumar Bhaduri

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Mishra, A.K., Sampath, S., Smith, G.M., Balila, N.J. (2020). Experimental Measurements of Interface Fracture Toughness Using Double Cantilever Bending. In: Prakash, R., Suresh Kumar, R., Nagesha, A., Sasikala, G., Bhaduri, A. (eds) Structural Integrity Assessment. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-8767-8_43

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  • DOI: https://doi.org/10.1007/978-981-13-8767-8_43

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-13-8766-1

  • Online ISBN: 978-981-13-8767-8

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