A STUDY ON THE CHANGES IN MICROSTRUCTURE AND MECHANICAL PROPERTIES OF MULTI-PASS WELDING BETWEEN 316 STAINLESS STEEL AND LOW-CARBON STEEL

  • A.T. Hoang Ho Chi Minh city University of Transport
  • V.V. Le Ho Chi Minh city University of Transport
  • A.X. Nguyen Vietnam Maritime University
  • D.N. Nguyen Vietnam Maritime University

Abstract


In this study, the changes in the microstructures and mechanical properties in the fusion zone and heat-affected zone (HAZ) of the welds between 316 stainless steel and low-carbon steel were investigated. The formation of the morphology of δ – Ferrite including the columnar dendritic and the equiaxed dendritic in either the single-pass welding or multi-pass welding was analyzed through SEM. The recrystallization phenomenon in two regions such as HAZ-1 with grain-refining and HAZ-2 with partial grain-refining was considered as the main cause leading to differences in the microstructure and mechanical properties of the above-mentioned welds. As a result, the hardness, tensile strength and elastic strength of multi-pass welding were higher than those of single-pass welding. The lower elongation of multi-pass welding compared to single-pass welding was also observed.

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Author Biographies

A.T. Hoang, Ho Chi Minh city University of Transport
Mechanical Engineering
V.V. Le, Ho Chi Minh city University of Transport
Mechanical Engineering
A.X. Nguyen, Vietnam Maritime University
Mechanical Engineering
D.N. Nguyen, Vietnam Maritime University
Material Science

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Published
2018-12-28
How to Cite
Hoang, A., Le, V., Nguyen, A., & Nguyen, D. (2018). A STUDY ON THE CHANGES IN MICROSTRUCTURE AND MECHANICAL PROPERTIES OF MULTI-PASS WELDING BETWEEN 316 STAINLESS STEEL AND LOW-CARBON STEEL. Journal of Advanced Manufacturing Technology (JAMT), 12(2), 25-40. Retrieved from https://jamt.utem.edu.my/jamt/article/view/3959
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Articles