PRECIPITATION PROCESS OF M23C6 AND SIGMA PHASE IN TYPE 316L WELD METAL.

Tadao Onzawa, Akito Takasaki, Hiroshi Tamura

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An author's previous paper on heat-treating of Type 316L weld metal revealed that the decomposition of delta ferrite in the weld metal (EWM) containing mainly an eutectic delta -ferrite occured rapidly as compared to that in the weld metal (PWM) containing mainly a primary delta ferrite and this reason was attributed to the difference in the lattice coherency at the delta / tau interface. In this paper, to clarify metallographically the results described above, the precipitation process of M//2//3C//6 and sigma phases was investigated by transmission electron microscopy using the weld metals heat-treated at 923 or 1123K. In the EWM specimen, at both the heat-treating temperature, the M//2//3C//6 phase precipitated initially at the delta / tau interface and then within delta ferrite grains and the precipitation of delta phase occured finally. However, in the PWM specimen, the precipitation of M//2//3C//6 could not be observed at all within delta ferrite grains.

Original languageEnglish
Pages (from-to)128-132
Number of pages5
JournalYosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society
Volume6
Issue number1
Publication statusPublished - 1988 Feb
Externally publishedYes

Fingerprint

Ferrite
Welds
Metals
Pulse width modulation
Eutectics
Transmission electron microscopy
Decomposition
Hot Temperature
Temperature

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

PRECIPITATION PROCESS OF M23C6 AND SIGMA PHASE IN TYPE 316L WELD METAL. / Onzawa, Tadao; Takasaki, Akito; Tamura, Hiroshi.

In: Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society, Vol. 6, No. 1, 02.1988, p. 128-132.

Research output: Contribution to journalArticle

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