0
Research Papers

Numerical Modeling of Transport Phenomena and Dendritic Growth in Laser Spot Conduction Welding of 304 Stainless Steel

[+] Author and Article Information
Wenda Tan, Neil S. Bailey, Yung C. Shin

 Center for Laser-Based Manufacturing, School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907

J. Manuf. Sci. Eng 134(4), 041010 (Jul 24, 2012) (8 pages) doi:10.1115/1.4007101 History: Received March 08, 2011; Revised June 16, 2012; Published July 24, 2012; Online July 24, 2012

A multiscale model is developed to investigate the heat/mass transport and dendrite growth in laser spot conduction welding. A macroscale transient model of heat transport and fluid flow is built to study the evolution of temperature and velocity field of the molten pool. The molten pool shape is calculated and matches well with the experimental result. On the microscale level, the dendritic growth of 304 stainless steel is simulated by a novel model that has coupled the cellular automata (CA) and phase field (PF) methods. The epitaxial growth is accurately identified by defining both the grain density and dendrite arm density at the fusion line. By applying the macroscale thermal history onto the microscale calculation domain, the microstructure evolution of the entire molten pool is simulated. The predicted microstructure achieves a good quantitative agreement with the experimental results.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Experimental and simulated shape of molten pool for (a) case 1 and (b) case 3 (experimental result for case 3 is from Ref. [10])

Grahic Jump Location
Figure 2

Temperature and fluid field for case 3 (benchmark simulation result is from Ref. [10])

Grahic Jump Location
Figure 6

Microstructure near fusion line of molten pool of Al-Cu Alloy [33]

Grahic Jump Location
Figure 7

Grain distribution in weld metal

Grahic Jump Location
Figure 8

Dendrite morphology in case 1: (a) and (b) at the pool bottom; (c) and (d) at the pool side

Grahic Jump Location
Figure 3

Cooling rate at the solidification front: (a) along pool surface; (b) along pool center axis

Grahic Jump Location
Figure 4

Schematic explanation of decentered square algorithm

Grahic Jump Location
Figure 5

Concentration distribution from cellular automata model to phase field model: (a) construction of 1D concentration profile; (b) mapping the profile to the phase field domain

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In