Rapid sorting of stainless steels by open-air laser-induced breakdown spectroscopy with detecting chromium, nickel, and molybdenum

Shunsuke Kashiwakura, Kazuaki Wagatsuma

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Laser-induced breakdown spectroscopy (LIBS) is a promising method for rapid determination of compositions of stainless steels in steel scrap. LIBS is widely known as a method for elemental analysis that enables a rapid determination. It has several advantages such that it can work under ambient pressure, and specimens can be tested without any pre-treatment such as acid digestion, cleaning, or polishing of surface of specimens. We applied a laboratory-build LIBS system for sorting of six types of stainless steels. The standard reference materials of JISF FXS 324-334, 335-343, and 344-349, which are respectively Fe-Ni, Fe-Cr, and Fe-Mo binary alloys, were employed for making calibration lines of them. Considering spectral interferences from emission lines of the iron matrix in these alloys, seven emission lines could be chosen. Longer gate width, shorter delay time, high stability of pulse laser energy, and more number of laser shots can decrease the fluctuation of emission intensity. Utilizing these parameters mentioned above, the sorting of stainless specimens by detecting chromium, nickel, and molybdenum could be achieved.

Original languageEnglish
Pages (from-to)2391-2396
Number of pages6
JournalIsij International
Volume55
Issue number11
DOIs
Publication statusPublished - 2015

Keywords

  • LIBS
  • Recycling
  • Sorting
  • Stainless
  • Steel scrap

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Rapid sorting of stainless steels by open-air laser-induced breakdown spectroscopy with detecting chromium, nickel, and molybdenum'. Together they form a unique fingerprint.

Cite this