Microstructure Change For Multi-Pass Welding Between Austenitic Stainless Steel And Carbon Steel

T. Nhung Le, M. Khanh Pham, A. Tuan Hoang (), T.N. Mai Bui and D. Nam Nguyen Nguyen
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T. Nhung Le: Vietnam Maritime University, Vietnam
M. Khanh Pham: Hanoi University of Science and Technology
A. Tuan Hoang: Ho Chi Minh city University of Transport
T.N. Mai Bui: Vietnam Maritime University, Vietnam
D. Nam Nguyen Nguyen: Vietnam Maritime University, Vietnam

Journal of Mechanical Engineering Research & Developments (JMERD), 2018, vol. 41, issue 2, 97-102

Abstract: The purpose of this study was to discuss the change in microstructures and hardness values in fusion zone (FZ) and heat-affected zone (HAZ) of austenitic stainless steel and carbon steel welds. By comparison, the morphology of δ – Ferrite which formed in the fusion zone of single-pass and multi-pass welding was analyzed. The columnar dendritic shape can be seen as features extending from the fusion line of a weld pass toward the subsequent passes. Furthermore, the δ-Ferrite morphology changed from fine cellular to columnar dendrite or equiaxed dendrite. The recrystallization phenomenon was only observed in the HAZ carbon steel side of multi-pass welding. This zone was divided into HAZ-1 (grain-refining region) and HAZ-2 (partial grain-refining region). The hardness values in each zone were measured with the highest value was on fusion boundary of carbon steel side. Transverse tensile was carried out.

Keywords: Dissimilar metal weld; HAZ; Weld metal; Austenite stainless steel; Carbon steel (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (8)

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Persistent link: https://EconPapers.repec.org/RePEc:zib:zjmerd:v:41:y:2018:i:2:p:97-102

DOI: 10.26480/jmerd.02.2018.97.102

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