Laser rapid forming of SS316L/Rene88DT graded material

X. Lin, Tai Man Yue, H. O. Yang, W. D. Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

83 Citations (Scopus)

Abstract

The stainless steel-SS316L/superalloy-Rene88DT graded material was successfully fabricated using laser rapid forming. A linear compositional gradient, from 100% SS316L stainless steel to 100% Rene88DT superalloy, was achieved within a thickness of 40 mm of laser multilayer deposition. The solidification behavior and the morphological evolution along the compositional gradient were investigated. It was found that, in the gradient zone, within the processing parameters of this study, there was continued epitaxial growth of the γ phase of the columnar dendrites, starting with 100% SS316L stainless steel to 100% Rene88DT superalloy, with the 〈1 0 0〉 crystallographic orientation parallel to the gradient direction. Clad layer bandings were found in the samples; however, the continuity of the growth of the columnar dendrites was not upset. The results are explained by the columnar to equiaxed transition theory and the criteria for planar interface instability and dendritic growth.
Original languageEnglish
Pages (from-to)325-336
Number of pages12
JournalMaterials Science and Engineering A
Volume391
Issue number1-2
DOIs
Publication statusPublished - 25 Jan 2005

Keywords

  • Functionally graded material
  • Laser rapid forming
  • Nickel alloy
  • Solidification
  • Stainless steel

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this