Microstructure and Hardness Properties of Butt and Fillet GMAW Welded Joints on HY80 High Strength Steel Plate

Winarto, Herry Oktadinata, Eddy Sumarno Siradj

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

2 Citations (Scopus)

Abstract

High-strength steel HY-80 is widely used for ship and submarine construction. This steel has a good combination of strength, ductility, and toughness at room temperature and sub-zero temperatures. Fusion welding is a very important process in high-strength steels, but the welding problem appears in a heat affected zone (HAZ) near the fusion line where a coarse grain heat affected zone (CGHAZ) is formed causing the impact toughness in CGHAZ reduce drastically so that the weld joint become brittle. CGHAZ is more susceptible to hydrogen-assisted cracking than weld metal (WM). The objectives of this study were to evaluate changes in microstructure, hardness distribution mode, and grain growth in weld joint. The material used in this research is high strength steel HY-80 welded with gas metal arc welding (GMAW) method using 90% Ar + 10% CO2 shielding gas and ER100S welding wire. Both butt and fillet weld joint types were applied. The results show the highest hardness was observed at CGHAZ for both butt and fillet weld. Butt weld joint type shows the hardness of HAZ and WM near bottom surface are higher than near upper surface due to lower heat input so that it contributed to higher cooling rate and the formation of martensite occurred.

Original languageEnglish
Title of host publicationHuman-Dedicated Sustainable Product and Process Design
Subtitle of host publicationMaterials, Resources, and Energy: Proceedings of the 4th International Conference on Engineering, Technology, and Industrial Application, ICETIA 2017
EditorsNurul Hidayati, Tri Widayatno, Hari Prasetyo, Eko Setiawan
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735416871
DOIs
Publication statusPublished - 26 Jun 2018
Event4th International Conference on Engineering, Technology, and Industrial Application: Human-Dedicated Sustainable Product and Process Design: Materials, Resources, and Energy, ICETIA 2017 - Surakarta, Central Java, Indonesia
Duration: 13 Dec 201714 Dec 2017

Publication series

NameAIP Conference Proceedings
Volume1977
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference4th International Conference on Engineering, Technology, and Industrial Application: Human-Dedicated Sustainable Product and Process Design: Materials, Resources, and Energy, ICETIA 2017
CountryIndonesia
CitySurakarta, Central Java
Period13/12/1714/12/17

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