TRANSMISSION ELECTRON MICROSCOPIC OBSERVATION AND MICROANALYSIS OF TYPE 316L WELD METAL - LOW TEMPERATURE TOUGHNESS OF AUSTENITIC STAINLESS STEEL WELD METAL (REPORT 2).

Hiroshi Tamura, Tadao Onzawa, Akito Takasaki

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1 Citation (Scopus)

Abstract

A previous paper which reported on the influence of delta-ferrite on low temperature toughness of Type 316L austenitic stainless steel weld metal, revealed that the toughness of as-welded specimens were dependent not only on the delta-ferrite content but also on the solidification mode. In this paper, various factors being affected on the toughness such as concentration difference, coherency, etc. , were investigated in detail by using a transmission electron microscopy (TEM), an analytical electron microscopy (STEM/EDX) and a scanning electron microscopy equipped with an energy dispersive X-ray spectrometer (SEM/EDX). From an electron diffraction analysis, a crystallographic orientation of primary delta-ferrite was coherent with that of its adjacent austenite matrix but in the eutectic delta-ferrite, the relation was incoherent. From the SEM/EDX analysis on the fractured surface of the Charpy tested eutectic delta-ferrite specimen, the chromium and molybdenum rich zones were measured, where these compositions were equivalent to that of delta-ferrite or cellular dendrite.

Original languageEnglish
Pages (from-to)256-262
Number of pages7
JournalYosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society
Volume5
Issue number2
Publication statusPublished - 1987 May
Externally publishedYes

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Microanalysis
Austenitic stainless steel
Toughness
Ferrite
Welds
Metals
Electrons
Energy dispersive spectroscopy
Temperature
Eutectics
Scanning electron microscopy
X ray spectrometers
Dendrites (metallography)
Molybdenum
Chromium
Electron diffraction
Austenite
Electron microscopy
Solidification
Transmission electron microscopy

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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title = "TRANSMISSION ELECTRON MICROSCOPIC OBSERVATION AND MICROANALYSIS OF TYPE 316L WELD METAL - LOW TEMPERATURE TOUGHNESS OF AUSTENITIC STAINLESS STEEL WELD METAL (REPORT 2).",
abstract = "A previous paper which reported on the influence of delta-ferrite on low temperature toughness of Type 316L austenitic stainless steel weld metal, revealed that the toughness of as-welded specimens were dependent not only on the delta-ferrite content but also on the solidification mode. In this paper, various factors being affected on the toughness such as concentration difference, coherency, etc. , were investigated in detail by using a transmission electron microscopy (TEM), an analytical electron microscopy (STEM/EDX) and a scanning electron microscopy equipped with an energy dispersive X-ray spectrometer (SEM/EDX). From an electron diffraction analysis, a crystallographic orientation of primary delta-ferrite was coherent with that of its adjacent austenite matrix but in the eutectic delta-ferrite, the relation was incoherent. From the SEM/EDX analysis on the fractured surface of the Charpy tested eutectic delta-ferrite specimen, the chromium and molybdenum rich zones were measured, where these compositions were equivalent to that of delta-ferrite or cellular dendrite.",
author = "Hiroshi Tamura and Tadao Onzawa and Akito Takasaki",
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