The Effect of the Nitrogen Absorption on the TEM Structure of SUS304L Austenitic Stainless Steel Weld Metal

Takeshi Kuwana, Hiroyuki Kokawa, Hiroshi Tsujii

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The effect of the nitrogen absorption on the transmission electron microscopic structure of SUS304L austenitic stainless steel weld metal was investigated by varying the nitrogen partial pressure of the Ar-N2 gas mixture welding atmosphere in an atmosphere-controlling chamber. An electron diffraction study suggested that the primary solidification mode of the weld metal alters from ferritic mode to austenitic one with the nitrogen partial pressure and the nitrogen content of weld metal. The austenite frequently adopts a near Kurdjumov-Sachs orientation relationship with the adjacent primary ferrite, while the eutectic ferrite does not adopt the K-S one with the adjacent austenite. The amount of the eutectic ferrite phase increases with the nitrogen partial pressure and the nitrogen content. In the weld metal with no ferrite, precipitation on dislocations and grain boundaries was observed.

Original languageEnglish
Pages (from-to)520-526
Number of pages7
Journalquarterly journal of the japan welding society
Volume4
Issue number3
DOIs
Publication statusPublished - 1986 Jan 1

Keywords

  • Crystallographic characteristics
  • Delta ferrite
  • Nitrogen absorption
  • Stainless steel
  • Transmission electron microscopy
  • Weld metal

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces, Coatings and Films
  • Metals and Alloys

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