A New Residual Strain Mapping Program Using Energy Dispersive X-Ray Diffraction at the Advanced Photon Source

J. S. Park*, A. C. Chuang, J. Okasinski, H. Chen, P. Shade, T. J. Turner, S. Stock, J. Almer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Background: The ability to non-destructively map the residual strain field inside an engineering component is important for predicting its fatigue life or developing processing methods to prevent failure or enhance performance. Objective: In this paper, we describe a new residual strain mapping program at the Advanced Photon Source, Argonne National Laboratory. Methods: The new program is based on energy dispersive x-ray diffraction (EDXRD). It is capable of non-destructively penetrating a several-cm thick polycrystalline sample fabricated from engineering alloys using high-energy x-rays and measuring the residual strain field with mm or better spatial resolution and approximately ± 1 × 10 - 4 strain resolution. A multi-element detector array is employed to measure multiple strain components simultaneously. The residual strain mapping setup is augmented with a high-energy tomography capability, allowing precise alignment of the material volume of interest for residual strain mapping and providing a complementary view of the structure to understand the measured strain field. Results: These measurement capabilities are demonstrated using several strain mapping examples ranging from polycrystalline structural alloys to biological materials. We also provide some guidance for the future users of the program for a successful residual strain mapping experiment. Conclusions: We are expanding the capabilities of the new setup with various in situ capabilities including thermo-mechanical loading.

Original languageEnglish (US)
Pages (from-to)1363-1379
Number of pages17
JournalExperimental Mechanics
Volume62
Issue number8
DOIs
StatePublished - Oct 2022

Keywords

  • ADXRD
  • Angle dispersive x-ray diffraction
  • EDXRD
  • Energy dispersive x-ray diffraction
  • Synchrotron radiation

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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