Prediction of temperature distribution, microstructure, and residual stresses generated during the welding process is crucial for the design and assessment of welded structures. In the multipass welding process of parts with different thicknesses, temperature distribution, microstructure, and residual stresses vary during each weld pass and from one part to another. This complicates the welding process and its analysis. In this paper, the evolution of temperature distribution and the microstructure generated during the multipass welding of AISI 321 stainless steel plates were studied numerically and experimentally. Experimental work involved designing and manufacturing benchmark specimens, performing the welding, measuring the transient temperature history, and finally observing and evaluating the microstructure. Benchmark specimens were made of corrosion-resistant AISI 321 stainless steel plates with different thicknesses of 6 mm and 10 mm. The welding process consisted of three welding passes of two shielded metal arc welding (SMAW) process and one gas tungsten arc welding (GTAW) process. Finite element (FE) models were developed using the DFLUX subroutine to model the moving heat source and two different approaches for thermal boundary conditions were evaluated using FILM subroutines. The DFLUX and FILM subroutines are presented for educational purposes, as well as a procedure for their verification.
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December 2015
Research-Article
Evolution of Temperature Distribution and Microstructure in Multipass Welded AISI 321 Stainless Steel Plates With Different Thicknesses
Soheil Nakhodchi,
Soheil Nakhodchi
1
Assistant Professor
Faculty of Mechanical Engineering,
e-mail: snakhodchi@kntu.ac.ir
Faculty of Mechanical Engineering,
K. N. Toosi University of Technology
,Tehran 1969764499
, Iran
e-mail: snakhodchi@kntu.ac.ir
1Corresponding author.
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Ali Shokuhfar,
Ali Shokuhfar
Professor
Advanced Materials and Nanotechnology Research Laboratory,
Faculty of Mechanical Engineering,
e-mail: shokuhfar@kntu.ac.ir
Advanced Materials and Nanotechnology Research Laboratory,
Faculty of Mechanical Engineering,
K. N. Toosi University of Technology
,Tehran 1969764499
, Iran
e-mail: shokuhfar@kntu.ac.ir
Search for other works by this author on:
Saleh Akbari Iraj,
Saleh Akbari Iraj
Faculty of Mechanical Engineering,
e-mail: saleh.akbari.iraj@gmail.com
K. N. Toosi University of Technology
,Tehran 1969764499
, Iran
e-mail: saleh.akbari.iraj@gmail.com
Search for other works by this author on:
Brian G. Thomas
Brian G. Thomas
Professor
Metal Process Simulation Laboratory,
Department of Mechanical Science and Engineering,
e-mail: bgthomas@illinois.edu
Metal Process Simulation Laboratory,
Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
,Urbana
, IL
61801e-mail: bgthomas@illinois.edu
Search for other works by this author on:
Soheil Nakhodchi
Assistant Professor
Faculty of Mechanical Engineering,
e-mail: snakhodchi@kntu.ac.ir
Faculty of Mechanical Engineering,
K. N. Toosi University of Technology
,Tehran 1969764499
, Iran
e-mail: snakhodchi@kntu.ac.ir
Ali Shokuhfar
Professor
Advanced Materials and Nanotechnology Research Laboratory,
Faculty of Mechanical Engineering,
e-mail: shokuhfar@kntu.ac.ir
Advanced Materials and Nanotechnology Research Laboratory,
Faculty of Mechanical Engineering,
K. N. Toosi University of Technology
,Tehran 1969764499
, Iran
e-mail: shokuhfar@kntu.ac.ir
Saleh Akbari Iraj
Faculty of Mechanical Engineering,
e-mail: saleh.akbari.iraj@gmail.com
K. N. Toosi University of Technology
,Tehran 1969764499
, Iran
e-mail: saleh.akbari.iraj@gmail.com
Brian G. Thomas
Professor
Metal Process Simulation Laboratory,
Department of Mechanical Science and Engineering,
e-mail: bgthomas@illinois.edu
Metal Process Simulation Laboratory,
Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
,Urbana
, IL
61801e-mail: bgthomas@illinois.edu
1Corresponding author.
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received August 18, 2014; final manuscript received April 4, 2015; published online June 9, 2015. Assoc. Editor: Xian-Kui Zhu.
J. Pressure Vessel Technol. Dec 2015, 137(6): 061405 (15 pages)
Published Online: December 1, 2015
Article history
Received:
August 18, 2014
Revision Received:
April 4, 2015
Online:
June 9, 2015
Citation
Nakhodchi, S., Shokuhfar, A., Iraj, S. A., and Thomas, B. G. (December 1, 2015). "Evolution of Temperature Distribution and Microstructure in Multipass Welded AISI 321 Stainless Steel Plates With Different Thicknesses." ASME. J. Pressure Vessel Technol. December 2015; 137(6): 061405. https://doi.org/10.1115/1.4030367
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