Processing parameter, microstructure and hardness of Ni base intermetallic alloy coating fabricated by laser cladding

Takeshi Okuno, Yasuyuki Kaneno, Takuto Yamaguchi, Takayuki Takasugi, Satoshi Semboshi, Hideki Hagino

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Ni base intermetallic alloy coating was fabricated by laser cladding, controlling the laser power and powder feed rate. Atomized powder of the Ni base intermetallic alloy was laser-cladded on the substrate of stainless steel 304. The hardness and microstructure of the clad layers were investigated by Vickers hardness test, SEM, XRD and TEM observations. The hardness of the cladding layer was affected by the dilution with the substrate; it increased with decreasing laser power and increasing powder feed rate. By optimizing the dilution with the substrate, the cladding layer with an almost identical hardness level to that of the Ni base intermetallic alloy fabricated by ingot metallurgy was obtained. The TEM observations revealed that a very fine-sized microstructure composed of Ni 3 Al and Ni 3 V was partially formed even in the as-cladded state. After annealing, the two-phase microstructure composed of Ni 3 Al and Ni 3 V was developed in the cladding layer, resulting in enhanced hardness in the cladding layers fabricated in the majority of cladding conditions.

Original languageEnglish
Pages (from-to)1381-1386
Number of pages6
JournalMRS Advances
Volume2
Issue number26
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Hardness
  • X-ray diffraction (XRD)
  • microstructure

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Processing parameter, microstructure and hardness of Ni base intermetallic alloy coating fabricated by laser cladding'. Together they form a unique fingerprint.

Cite this