compressive residual

36 examples (0.02 sec)
  • The tool path and normal pressure applied are designed to create a distribution of compressive residual stress.
  • These methods create deep compressive residual stresses to increase component life.
  • Compressive residual stresses can be measured below the surface of a deep-rolled fillet.
  • Like nitriding, carburization also leaves some compressive residual stresses in the surface.
  • The deeper the compressive residual stress the more significant the fatigue life and damage tolerance improvement.
  • Shot peening is a cold working process used to produce a compressive residual stress layer and modify mechanical properties of metals.
  • Experimentation has indicated compressive residual stresses can be generated that extend greater than 8 mm into part surfaces.
  • A sub-surface compressive residual stress profile is measured using techniques such as x-ray diffraction and hardness profile testing.
  • In particular, brittle materials can be toughened by including compressive residual stress, as in the case for toughened glass and pre-stressed concrete.
  • The induced compressive residual stresses in the treatment prevent the track cracking and the crack propagation on the surface.
  • Roller burnishing is a method of cold working metal surfaces to induce compressive residual stresses and enhance surface roughness qualities.
  • A material having compressive residual stress helps to prevent brittle fracture because the initial crack is formed under compressive (negative tensile) stress.
  • The plastic deformation associated with burnishing will harden the surface and generate compressive residual stresses.
  • The advantage of nitridization is that it can be done at low temperatures, it produces a very hard surface, and the process leaves some compressive residual stress in the surface, which is good for fatigue properties.
  • Mechanical methods to relieve undesirable surface tensile stresses and replace them with beneficial compressive residual stresses include shot peening and laser peening.
  • The resulting deep layer of compressive residual stress has also been shown to improve high cycle fatigue (HCF) and low cycle fatigue (LCF) performance.
  • The radius itself reduces the stress in these critical areas, but since the radius in most cases is rolled, this also leaves some compressive residual stress in the surface, which prevents cracks from forming.
  • For example, compressive residual stress can be enhanced via peening or roller burnishing or the recast layer left by EDMing can be removed via chemical milling.
  • The compressive residual stresses imparted by laser peening are precisely controlled both in location and intensity, and can be applied to mitigate sharp transitions into tensile regions.
  • Low plasticity burnishing (LPB) is a method of metal improvement that provides deep, stable surface compressive residual stresses with little cold work for improved damage tolerance and metal fatigue life extension.
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