The Effects of Surface Layer on Plastic Deformation and Crack Propagation

Abstract

Final rept.,FKramer,Irvin R. ;DAAG46-70-C-0102, ARPA Order- 188AMMRCCR-71-2/6(*aluminum alloys, crack propagation), (*titanium alloys, crack propagation), (*steel, crack propagation), (*crack propagation, metals), stresses, fatigue(mechanics), surface properties, vanadium alloys, deformationaluminum alloy 2014, plastic deformation, steel 4130, titanium alloy 6al 4vThe crack propagation of 2014-T6 aluminum, titanium (6Al-4V), and 4130 steel (YS = 180,000 psi) was measured under plane stress and plane strain, and a comparison was made to determine the effect of eliminating or decreasing the surface layer on the cracking resistance of the specimens. It was also shown that when specimens of 2014-T6 aluminum, titanium (6Al-4V), and 4130 steel were fatigued, the surface-layer stress increased. The number of cycles required to initiate a propagating crack was determined.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1973
Accession Number
AD0765519

Entities

People

  • Irvin R. Kramer

Organizations

  • Martin Marietta

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aluminum
  • Aluminum Alloys
  • Amplitude
  • Chemistry
  • Crack Propagation
  • Cracks
  • Ductile Brittle Transition
  • Materials
  • Materials Processing
  • Mechanical Working
  • Mechanics
  • Metals
  • Resistance
  • Shot Peening
  • Stress Intensity Factors
  • Stresses
  • Titanium

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).