Characterization of the Microstructure of 50% Nickel - 50% Chromium Alloy Produced by Spray Metal Forming

Abstract

In order to understand the microstructure of 50V0 nickel - 50% chromium alloy produced using spray forming, 3 mm diameter disks of the alloy were cut from several samples. The disks were thinned by electrochemical jet polishing using a mixture of HJP04 and H2S04. The microstructure is very complex. Some areas showed a composite structure of spherical 5- (Cr-Ni) particles imbedded in a dimpled matrix of Cr-Ni. Some areas had a distribution of spherical 8- (Cr-Ni) and Cr-Ni imbedded in planar nickel matrix. The most interesting result is that the microstructure consisted of areas of fine disc shaped (Ni3C, Cr2C and CrC) carbide precipitates dispersed in a nickel matrix. These carbides always tend to orient in a preferred direction, and formed a concentric ring type structure.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2001
Accession Number
ADA394411

Entities

People

  • A. S. Rao
  • Leslie K. Kohler
  • Louis F. Aprigllano

Organizations

  • Naval Surface Warfare Center Carderock Division

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Alloys
  • Chromium
  • Chromium Alloys
  • Composite Materials
  • Composite Structures
  • Crystal Structure
  • Diameters
  • Diffraction
  • Electron Diffraction
  • Electron Microscopy
  • Materials
  • Materials Science
  • Metals
  • Microstructure
  • Particles
  • Spray Forming
  • Surface Warfare

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.