Microstructure characteristics in TIG welded joint of Mo–Cu composite and 18-8 stainless steel

The welding of Mo–Cu composite and 18-8 stainless steel was carried out by Tungsten Inert Gas welding process with Cr–Ni fillet wires. The microstructure, element distribution, phase constituents and microhardness of the joint were analysed. The results indicate that austenite and ferrite phases wer...

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Published in:International journal of refractory metals & hard materials 2010-05, Vol.28 (3), p.429-433
Main Authors: Qinglei, Jiang, Yajiang, Li, Puchkov, U.A., Juan, Wang, Chunzhi, Xia
Format: Article
Language:English
Subjects:
18-8 Stainless steel
AUSTENITE
COMPOSITES
Constituents
Copper
HARDNESS
JOINTS
Microhardness
Microstructure
MICROSTRUCTURES
Mo–Cu composite
STAINLESS STEELS
STEELS
TIG welding
WELD METAL
WELDING
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cited_by cdi_FETCH-LOGICAL-c338t-483898266808d6c6e3578e72a7ff89e0760cd399958dbd2645ac8acecee9005d3
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container_end_page 433
container_issue 3
container_start_page 429
container_title International journal of refractory metals & hard materials
container_volume 28
creator Qinglei, Jiang
Yajiang, Li
Puchkov, U.A.
Juan, Wang
Chunzhi, Xia
description The welding of Mo–Cu composite and 18-8 stainless steel was carried out by Tungsten Inert Gas welding process with Cr–Ni fillet wires. The microstructure, element distribution, phase constituents and microhardness of the joint were analysed. The results indicate that austenite and ferrite phases were obtained in the weld metal. Austenite and delta ferrite structures were observed in the fusion zone near 18-8 stainless steel. Cu agglomeration regions formed in Mo–Cu composite heat affected zone during welding. The microhardness near the fusion zone at Mo–Cu composite side increased from weld metal to fusion zone, and the peak value appeared near the boundary between fusion zone and Mo–Cu composite due to the generation of high hardness and brittleness Fe–Mo intermetallic compounds. The phase constituents near the fusion zone at Mo–Cu composite are Mo, Cu and γ-Fe (Ni), Cu 3.8Ni and the Fe–Mo compound Fe 0.54Mo 0.73.
doi_str_mv 10.1016/j.ijrmhm.2010.01.004
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source ScienceDirect Journals
subjects 18-8 Stainless steel
AUSTENITE
COMPOSITES
Constituents
Copper
HARDNESS
JOINTS
Microhardness
Microstructure
MICROSTRUCTURES
Mo–Cu composite
STAINLESS STEELS
STEELS
TIG welding
WELD METAL
WELDING
title Microstructure characteristics in TIG welded joint of Mo–Cu composite and 18-8 stainless steel
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