The effect of liquid gallium on the strengths of stainless steel and thermoplastics

K. A. Narh, V. P. Dwivedi, J. M. Grow, A. Stana, W. Y. Shih

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We have investigated the effect of liquid gallium on type 316L stainless steel (as a candidate for the P-V-T pressure vessel), and four thermoplastics: two semicrystalline (high-density polyethylene and polypropylene) and two amorphous (polystyrene and poly(methyl methacrylate)). Specimens were coated with gallium and held at elevated temperatures and reduced pressure for extended periods. Measurements conducted on the plastics include weight change analyses, tensile tests and particle diffusion analysis using dispersion X-ray spectroscopy. For the stainless steel specimens, tensile and corrosion tests were conducted. Scanning electron microscopy was used to determine the level of corrosion. The results are compared with specimens heat treated identically but without gallium contact. After 3 months, the gallium corroded the surface of the steel to a depth of only 12 μm. No penetration path of the gallium into the steel has been observed. The gallium was also found to cause no change in the mechanical properties of the polymers tested, nor was it found to have caused any weight change in the specimens.

Original languageEnglish (US)
Pages (from-to)329-337
Number of pages9
JournalJournal of Materials Science
Volume33
Issue number2
DOIs
StatePublished - 1998

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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