Laser cladding of stainless steel on magnesium ZK60/SiC composite

Tai Man Yue, Q. W. Hu, Z. Mei, Hau Chung Man

Research output: Journal article publicationJournal articleAcademic researchpeer-review

49 Citations (Scopus)

Abstract

Laser cladding of stainless steel on ZK60/SiC composite was achieved by using a two-step method, i.e. thermal spray and laser re-melting. This was made possible by using interlayers of brass and copper, as a result, good metallurgical bond interfaces were obtained. However, the rapid solidification condition caused liquid phase separation. As a consequence, small spheroids of copper-rich phase were formed in the stainless steel matrix, which are found to be detrimental to the corrosion resistance of the material. Nonetheless, the corrosion potential (Ecorr) of the laser-cladded sample was 1090 and 820 mV higher than that of the as-received and as-sprayed samples, respectively, while the corrosion current (icorr) was some two and four orders of magnitude lower. The laser-cladded sample, like the untreated composite, did not show a passive region in the polarization plot. This is believed to be due to the segregation of copper-rich phase at interdendritic regions, and the presence of copper-rich spheroids in the stainless steel matrix.
Original languageEnglish
Pages (from-to)165-170
Number of pages6
JournalMaterials Letters
Volume47
Issue number3
DOIs
Publication statusPublished - 1 Jan 2001

ASJC Scopus subject areas

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

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