This system will be undergoing maintenance April 18th between 9:00AM and 12:00PM CDT.

Prediction of non-equilibrium solidification modes in austenitic stainless steel laser welds Metadata

Metadata describes a digital item, providing (if known) such information as creator, publisher, contents, size, relationship to other resources, and more. Metadata may also contain "preservation" components that help us to maintain the integrity of digital files over time.

Available Formats

Dublin Core: XML Dublin Core: JSON Dublin Core: Text Dublin Core: RDF/XML UNTL: XML Access METS: XML

Title

  • Main Title Prediction of non-equilibrium solidification modes in austenitic stainless steel laser welds

Creator

  • Author: Vitek, J. M.
    Creator Type: Personal
  • Author: David, S. A.
    Creator Type: Personal

Contributor

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

Publisher

  • Name: Oak Ridge National Laboratory
    Place of Publication: Tennessee
    Additional Info: Oak Ridge National Lab., TN (United States)

Date

  • Creation: 1993-08-01

Language

  • English

Description

  • Content Description: A primary austenitic, non-equilibrium mode of solidification can be induced in many 300 series austenitic stainless steels by laser welding and other rapid solidification techniques. The change in solidification mode can often result in a fully austenitic microstructure compared to the two phase ferrite plus austenite microstructure that is commonly found after primary ferrite solidification. A predictive capability for the solidification mode under rapid solidification conditions such as laser welding is needed since the microstructure and properties are closely related to solidification behavior. Conventional constitutional diagrams do not predict with any reliability the change to non-equilibrium austenitic solidification mode. Several means that have been attempted to predict the solidification behavior under extreme conditions are reviewed. The Cr{sub EQ}/Ni{sub EQ} ratio is shown to be unreliable, at least with the equivalence factors commonly used. Theoretical calculations of growth rate competition between ferrite and austenite solidification show promise, but some ambiguity results from inaccuracy in thermophysical material parameters. Use of calculated thermodynamic parameters such as equilibrium and non-equilibrium liquidus and solidus temperatures also shows some promise. However, this approach is not completely satisfactory and reliable either. It is concluded that a reliable and accurate method for predicting the tendency of austenitic stainless steels to solidify in the non-equilibrium mode is not yet available.
  • Physical Description: 37 p.

Subject

  • Keyword: Forecasting 360101
  • Keyword: Metastable States
  • Keyword: Austenite
  • Keyword: Austenitic Steels
  • STI Subject Categories: 36 Materials Science
  • Keyword: Stainless Steels
  • STI Subject Categories: 360102
  • Keyword: Structure And Phase Studies
  • Keyword: Laser Welding
  • Keyword: Solidification
  • Keyword: Preparation And Fabrication

Source

  • Conference: Annual meeting of the Metallurgical Society,Denver, CO (United States),21-25 Feb 1993

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: DE93018457
  • Report No.: CONF-930202--11
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 10178552
  • Archival Resource Key: ark:/67531/metadc1388186

Note

  • Display Note: OSTI; NTIS; GPO Dep.
Back to Top of Screen