Microstructural Characterization of a Cobalt-Free Maraging Steel, Vasco Max T-250

Abstract

A cobalt-free maraging steel, Vasco Max t-250, is being used as a replacement for the conventional, 18% Ni 300 grade maraging steel used by the Army. The thrust of this programs was to characterized the microstructure of annealed and aged specimens using optical and electron microscopy and X-ray diffraction. The structure of the annealed sample is a heavily dislocated lath martensite. The aged sample are a lath martensite that contains very fine Ni3Ti second phase particles. The precipitates are coherent with the matrix and form in a Widmanstatten pattern. The Ni3Ti precipitates are a very effective strengthening phase of the Vasco Mas T-250 and the aging temperature that appears to optimize the strengthening precipitates is 950 F.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1987
Accession Number
ADA180927

Entities

People

  • Kerry N. Siebein

Tags

Communities of Interest

  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Diffraction
  • Electron Microscopy
  • Heat Treatment
  • High Density
  • Intermetallic Compounds
  • Iron
  • Materials
  • Mechanical Properties
  • Mechanics
  • Microscopy
  • Military Research
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems