In-situ measurement of Ti-6Al-4V grain size distribution using laser-ultrasonic technique

Feng Dong, Xiaochen Wang*, Quan Yang, Huaqiang Liu, Dong Xu, Youzhao Sun, Yanjie Zhang, Renjie Xue, Sridhar Krishnaswamy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

A laser-ultrasonic system was established combining an 8 ns width pulsed laser for ultrasound generation and a two-wave mixing (TWM) interferometer for detection. Several Ti-6Al-4V samples were heat treated variously to get different grain sizes. Longitudinal wave back wall echoes were used to calculate the frequency dependent attenuation of ultrasound after the signals were denoised using wavelet transform. A model was built to calculate the log-normal distribution of grain size based on the correlation between the frequency dependent attenuation and the volumetric grain size distribution derived from electron backscattering diffraction data (EBSD) using Schwartz–Saltykov method.

Original languageEnglish (US)
Pages (from-to)40-44
Number of pages5
JournalScripta Materialia
Volume154
DOIs
StatePublished - Sep 2018

Keywords

  • Electron backscattering diffraction
  • Grain size distribution
  • Nondestructive testing
  • Thermally stimulated acoustic methods
  • Titanium alloys

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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