Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)

Effect of Pulse Current on Microstructure and Hardness of 316LN Weld Metal

Authors
Peng He, Keshun Dai, Haokun Gu, Xuefeng Ruan, Wenkai Xiao
Corresponding Author
Peng He
Available Online February 2018.
DOI
10.2991/ifeesm-17.2018.191How to use a DOI?
Keywords
316LN ASS; pulse current; weld metal; microstructure; microhardness.
Abstract

316LN austenitic stainless steel (ASS) has been used as a magnetic support structure for ITER. Pulse current as a new materials processing method, has many remarkable advantages. In this paper, the pulse current was used to treat the 316LN ASS welded metal welded by narrow gap MAG welding. The influence of different pulse current parameters on microstructures and microhardness of 316LN austenitic stainless steel weld metal was investigated. It was found that the microstructure of 316LN weld metal had a transitional trend from columnar sub-grains to equiaxed grains when the pulse current is increased to 700A. As the pulse current gradually increasing, the microhardness of weld metal first showed a constant trend, then decrease, and finally increase; with the increase of processing time, the microhardness of weld metal increased; with the increase of pressure, the microhardness of weld metal increased too.

Copyright
© 2018, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)
Series
Advances in Engineering Research
Publication Date
February 2018
ISBN
978-94-6252-453-8
ISSN
2352-5401
DOI
10.2991/ifeesm-17.2018.191How to use a DOI?
Copyright
© 2018, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Peng He
AU  - Keshun Dai
AU  - Haokun Gu
AU  - Xuefeng Ruan
AU  - Wenkai Xiao
PY  - 2018/02
DA  - 2018/02
TI  - Effect of Pulse Current on Microstructure and Hardness of 316LN Weld Metal
BT  - Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)
PB  - Atlantis Press
SP  - 1035
EP  - 1038
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-17.2018.191
DO  - 10.2991/ifeesm-17.2018.191
ID  - He2018/02
ER  -