MICROSTRUCTURE CHANGE FOR MULTI-PASS WELDING BETWEEN AUSTENITIC STAINLESS STEEL AND CARBON STEEL
Journal Title: Journal of Mechanical Engineering Research & Developments (JMERD) - Year 2018, Vol 41, Issue 2
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.
Authors and Affiliations
T. Nhung Le, M. Khanh Pham, A. Tuan Hoang, T. N. Mai Bui, D. Nam Nguyen
Keywords
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- EP ID EP405898
- DOI 10.26480/jmerd.02.2018.97.102
- Views 52
- Downloads 0
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