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Additive fabrication of 316L/Inconel625/Ti6Al4V functionally graded materials by laser synchronous preheating

  • Wei Meng
  • Wenhao Zhang
  • Wang Zhang
  • Xiaohui YinEmail author
  • Lijie Guo
  • Bing Cui
ORIGINAL ARTICLE
  • 8 Downloads

Abstract

This work examines a functionally graded material, fabricated using laser-directed deposition and synchronous preheating, that grades from 316L stainless steel to Ti6Al4V through a transition of Inconel625. The cracking behavior, microstructure evolution, and microhardness were determined as a function of position within the graded materials. The results showed that cracks occurred in the 316L/Inconel625- and Inconel625/Ti6Al4V-graded specimen with no preheating, defined as a solidification crack and cold crack, respectively. Precipitations of Mo-enriched eutectic phase were experimentally identified to be the major cause of the cracking. The precipitated phases of prepared gradient materials were fine and uniform by laser synchronous preheating, and no cracks were found. The hardness reached the maximum value in 70% Inconel625 + 30% Ti6Al4V. Work shows that the key to fabricating 316L/Inconel625/Ti6Al4V gradient material by laser deposition is to reduce the formation of Cr and Mo enrichment phase and the uneven temperature tendency.

Keywords

Functionally graded material Laser deposition Cracking Synchronous preheating Nickel alloy Titanium 

Notes

Funding information

This work was supported by the Natural Science Fund of Anhui Province Education Office No. KJ 2018A0063 and the National Science Foundation of China under Grant Nos. 51505271 and 51375015.

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  • Wei Meng
    • 1
  • Wenhao Zhang
    • 1
  • Wang Zhang
    • 2
  • Xiaohui Yin
    • 1
    Email author
  • Lijie Guo
    • 1
  • Bing Cui
    • 1
  1. 1.School of Materials Science and EngineeringAnhui University of TechnologyMa’anshanChina
  2. 2.School of Material Science and EngineeringShanghai Dianji UniversityShanghaiChina

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