Hydrogen Embrittlement of Niobium III - High Temperature Behavior.

Abstract

The deformation behavior in niobium-hydrogen alloys was investigated in the temperature range 125 - 500 C and at compositions up to H/Nb of 0.9. High temperature tensile tests and fractographic studies were applied to determine the fracture mechanisms. It is shown that at T < or = 450 C and H/Nb > or = 0.3 fracture occurs by a cleavage mode. The mechanism of this high temperature hydrogen embrittlement is discussed. The fracture mechanism is shown to be consistent with the stress induced formation and cleavage of NbH2. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 18, 1977
Accession Number
ADA047957

Entities

People

  • Howard K. Birnbaum
  • S. Gahr

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Alloys
  • Crystal Structure
  • Embrittlement
  • Energy
  • High Temperature
  • Hydrogen
  • Hydrogen Embrittlement
  • Low Temperature
  • Mechanical Properties
  • Mechanics
  • Phase
  • Phase Diagrams
  • Solid Solutions
  • Stress Concentration
  • Stresses
  • Surface Energy
  • Tensile Stress

Readers

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