Accession Number : ADA444204


Title :   Overview of Low Plasticity Burnishing for Mitigation of Fatigue Damage Mechanisms


Descriptive Note : Conference paper


Corporate Author : LAMBDA RESEARCH CINCINNATI OH


Personal Author(s) : Prevey, Paul S ; Jayaraman, N ; Cammett, John


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a444204.pdf


Report Date : Sep 2005


Pagination or Media Count : 7


Abstract : Surface enhancement technologies such as shot peening (SP), laser shock peening (LSP), and low plasticity burnishing (LPB) can provide substantial fatigue life improvement. However, to be effective, the compressive residual stresses that increase fatigue strength must be retained in service. LPB provides thermally stable compression and can be performed in conventional machine shop environments on CNC machine tools. LPB enables the extension of component service lives fatigue limited by various damage mechanisms including foreign object damage (FOD), corrosion fatigue, pitting, and fretting. The thermal and mechanical stability of the compressive layer are briefly reviewed. The LPB process, tooling, and control system are briefly described. Four representative applications are presented: thermal stability in IN718, improved damage tolerance in Ti-6-4 fan blades, mitigation of fretting fatigue damage in Ti-6-4, and improved corrosion fatigue in 17-4PH stainless steel.


Descriptors :   *FATIGUE LIFE , *PLASTIC PROPERTIES , COMPRESSION , SYMPOSIA , FOREIGN OBJECT DAMAGE , PITTING , FRETTING , SHOT PEENING , SUPERALLOYS , TITANIUM , STAINLESS STEEL , CORROSION


Subject Categories : Plastics
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE