Experimental Mechanics

, Volume 55, Issue 9, pp 1705–1715

In Situ Microscopic Investigation to Validate Acoustic Emission Monitoring

  • B. Wisner
  • M. Cabal
  • P. A. Vanniamparambil
  • J. Hochhalter
  • W. P. Leser
  • A. Kontsos
Article

DOI: 10.1007/s11340-015-0074-5

Cite this article as:
Wisner, B., Cabal, M., Vanniamparambil, P.A. et al. Exp Mech (2015) 55: 1705. doi:10.1007/s11340-015-0074-5

Abstract

A novel experimental mechanics technique using Scanning Electron Microscopy (SEM) in conjunction with Acoustic Emission (AE) monitoring is discussed to investigate microstructure-sensitive mechanical behavior and damage of metals and to validate AE related information. Validation for the use of AE method was obtained by using aluminum alloy sharp notch specimens with different geometries tested inside the microscope and compared to results obtained outside the microscope, as well as to previously published data on similar investigations at the laboratory specimen scale. Additionally, load data were correlated with both AE information and microscopic observations of microcracks around grain boundaries as well as secondary cracks, voids, and slip bands. The reported AE results are in excellent agreement with similar findings at the mesoscale, while they are further correlated with in situ and post mortem observations of microstructural damage processes.

Keywords

In-situ SEM Acoustic emission Damage precursors Fracture 

Copyright information

© Society for Experimental Mechanics 2015

Authors and Affiliations

  • B. Wisner
    • 1
  • M. Cabal
    • 1
  • P. A. Vanniamparambil
    • 1
  • J. Hochhalter
    • 2
  • W. P. Leser
    • 2
  • A. Kontsos
    • 1
  1. 1.Department of Mechanical Engineering & Mechanics, Theoretical & Applied Mechanics GroupDrexel UniversityPhiladelphiaUSA
  2. 2.Durability, Reliability, and Damage Tolerance BrachNASA Langley Research CenterHamptonUSA

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