Preferential precipitation site of sigma phase in duplex stainless steel weld metal

Yutaka S. Sato; Hiroyuki Kokawa

doi:10.1016/S1359-6462(98)00483-7

Preferential precipitation site of sigma phase in duplex stainless steel weld metal

Yutaka S. Sato, Hiroyuki Kokawa

ENG - Materials Processing

Tohoku University

Research output: Contribution to journal › Article › peer-review

134 Citations (Scopus)

Abstract

The effects of crystallographic orientation relationship at ferrite/austenite (α/γ) interface on sigma phase formation in a duplex stainless steel weld metal were studied. Crystallographic orientations of ferrite and austenite grains in the base and weld metals were determined by electron backscattered diffraction and the crystallographic orientation maps were drawn by orientation imaging microscopy. Sigma phase formed at one side of the α/γ interfaces along intragranular austenite. The crystallographic orientations at ferrite/austenite interfaces where sigma phase forms deviated largely from the Kurdjumov-Sachs (K-S) orientation relationship. The minimum deviation angle for sigma phase formation decreased with increasing annealing time.

Original language	English
Pages (from-to)	659-663
Number of pages	5
Journal	Scripta Materialia
Volume	40
Issue number	6
DOIs	https://doi.org/10.1016/S1359-6462(98)00483-7
Publication status	Published - 1999 Feb 19

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title = "Preferential precipitation site of sigma phase in duplex stainless steel weld metal",

abstract = "The effects of crystallographic orientation relationship at ferrite/austenite (α/γ) interface on sigma phase formation in a duplex stainless steel weld metal were studied. Crystallographic orientations of ferrite and austenite grains in the base and weld metals were determined by electron backscattered diffraction and the crystallographic orientation maps were drawn by orientation imaging microscopy. Sigma phase formed at one side of the α/γ interfaces along intragranular austenite. The crystallographic orientations at ferrite/austenite interfaces where sigma phase forms deviated largely from the Kurdjumov-Sachs (K-S) orientation relationship. The minimum deviation angle for sigma phase formation decreased with increasing annealing time.",

author = "Sato, {Yutaka S.} and Hiroyuki Kokawa",

note = "Funding Information: The authors are grateful to Mr. Yoshiaki Itoh for his help with the experiments and acknowledge the technical assistance of Mr. Akira Honda. Financial supports from the ISIJ Research Promotion Grant and from the Japanese Ministry of Education, Science, Sports and Culture with a Grant-in-Aid for Scientific Research (B) are gratefully acknowledged.",

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doi = "10.1016/S1359-6462(98)00483-7",

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pages = "659--663",

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TY - JOUR

T1 - Preferential precipitation site of sigma phase in duplex stainless steel weld metal

AU - Sato, Yutaka S.

AU - Kokawa, Hiroyuki

N1 - Funding Information: The authors are grateful to Mr. Yoshiaki Itoh for his help with the experiments and acknowledge the technical assistance of Mr. Akira Honda. Financial supports from the ISIJ Research Promotion Grant and from the Japanese Ministry of Education, Science, Sports and Culture with a Grant-in-Aid for Scientific Research (B) are gratefully acknowledged.

PY - 1999/2/19

Y1 - 1999/2/19

N2 - The effects of crystallographic orientation relationship at ferrite/austenite (α/γ) interface on sigma phase formation in a duplex stainless steel weld metal were studied. Crystallographic orientations of ferrite and austenite grains in the base and weld metals were determined by electron backscattered diffraction and the crystallographic orientation maps were drawn by orientation imaging microscopy. Sigma phase formed at one side of the α/γ interfaces along intragranular austenite. The crystallographic orientations at ferrite/austenite interfaces where sigma phase forms deviated largely from the Kurdjumov-Sachs (K-S) orientation relationship. The minimum deviation angle for sigma phase formation decreased with increasing annealing time.

AB - The effects of crystallographic orientation relationship at ferrite/austenite (α/γ) interface on sigma phase formation in a duplex stainless steel weld metal were studied. Crystallographic orientations of ferrite and austenite grains in the base and weld metals were determined by electron backscattered diffraction and the crystallographic orientation maps were drawn by orientation imaging microscopy. Sigma phase formed at one side of the α/γ interfaces along intragranular austenite. The crystallographic orientations at ferrite/austenite interfaces where sigma phase forms deviated largely from the Kurdjumov-Sachs (K-S) orientation relationship. The minimum deviation angle for sigma phase formation decreased with increasing annealing time.

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U2 - 10.1016/S1359-6462(98)00483-7

DO - 10.1016/S1359-6462(98)00483-7

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SN - 1359-6462

VL - 40

SP - 659

EP - 663

JO - Scripta Materialia

JF - Scripta Materialia

IS - 6

ER -

Preferential precipitation site of sigma phase in duplex stainless steel weld metal

Abstract

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