Computer modeling of arc welds to predict effects of critical variables on weld penetration Metadata

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Title

  • Main Title Computer modeling of arc welds to predict effects of critical variables on weld penetration

Creator

  • Author: Zacharia, T.
    Creator Type: Personal
  • Author: David, S.A.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: DOE; USDOE, Washington, DC (United States)

Publisher

  • Name: Oak Ridge National Laboratory
    Place of Publication: Tennessee

Date

  • Creation: 1991-01-01

Language

  • English

Description

  • Content Description: In recent years, there have been several attempts to study the effect of critical variables on welding by computational modeling. It is widely recognized that temperature distributions and weld pool shapes are keys to quality weldments. It would be very useful to obtain relevant information about the thermal cycle experienced by the weld metal, the size and shape of the weld pool, and the local solidification rates, temperature distributions in the heat-affected zone (HAZ), and associated phase transformations. The solution of moving boundary problems, such as weld pool fluid flow and heat transfer, that involve melting and/or solidification is inherently difficult because the location of the solid-liquid interface is not known a priori and must be obtained as a part of the solution. Because of non-linearity of the governing equations, exact analytical solutions can be obtained only for a limited number of idealized cases. Therefore, considerable interest has been directed toward the use of numerical methods to obtain time-dependant solutions for theoretical models that describe the welding process. Numerical methods can be employed to predict the transient development of the weld pool as an integral part of the overall heat transfer conditions. The structure of the model allows each phenomenon to be addressed individually, thereby gaining more insight into their competing interactions. 19 refs., 6 figs., 1 tab.
  • Physical Description: Pages: (18 p)

Subject

  • Keyword: Heat Transfer
  • Keyword: Fluid Flow
  • Keyword: Arc Welding
  • Keyword: Gas Metal-Arc Welding
  • STI Subject Categories: 36 Materials Science
  • Keyword: Phase Transformations
  • Keyword: Mathematical Models
  • Keyword: Joining
  • Keyword: Welding
  • Keyword: Gas Tungsten-Arc Welding
  • Keyword: Mass Transfer
  • Keyword: Energy Transfer
  • Keyword: Fabrication
  • Keyword: Convection
  • Keyword: Solidification
  • Keyword: Zones 360101* -- Metals & Alloys-- Preparation & Fabrication
  • Keyword: Heat Affected Zone

Source

  • Conference: 7. annual North American welding research (NAWR) conference, Columbus, OH (United States), 2-4 Oct 1991

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Other: DE92000428
  • Report No.: CONF-9110226-1
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 5344879
  • Archival Resource Key: ark:/67531/metadc1071861

Note

  • Display Note: OSTI; NTIS; GPO Dep.