The effect of shielded metal arc and gas tungsten arc welding methods on 308L stainless steel weldments

Shao Pin Lin, Ge Ping Yu, J. Y. Huang, H. J. Chen, R. C. Kuo, E-Wen Huang, Jia Hong Huang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Shielded metal arc (SMA) and gas tungsten arc (GTA) weldments were investigated to study the welding effects on the mechanical behavior of 308L austenitic stainless steel weldments, respectively. Both SMA and GTA weldments showed dendritic microstructure. The observed austenitic stainless steel welds solidified to give primary ferrite and secondary austenite as the ferritic-austenitic solidification mode (FA-mode) solidification. However, the lower heat input with larger Cr-versus-Ni ratio in SMA weld process led to lathy ferrite morphology and more residual ferrite in the SMA welds, while vermicular ferrite morphology was shown in GTA weldments. The yield strength of the welds significantly increased with decreasing elongation, which was mainly due to the dual phase strengthening effect after rapid solidification during welding.

Original languageEnglish
Title of host publicationTHERMEC 2013
PublisherTrans Tech Publications Ltd
Pages2753-2757
Number of pages5
ISBN (Print)9783038350736
DOIs
StatePublished - 1 Jan 2014
Event8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013 - Las Vegas, NV, United States
Duration: 2 Dec 20136 Dec 2013

Publication series

NameMaterials Science Forum
Volume783-786
ISSN (Print)0255-5476

Conference

Conference8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013
CountryUnited States
CityLas Vegas, NV
Period2/12/136/12/13

Keywords

  • 308L weldments
  • Gas tungsten arc welding
  • Shielded metal arc welding

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