Influence of forging conditions on the fatigue mechanisms of low alloy steels: a 3D study
作者: P. LorenzinoJean-Y. BuffiereC. Verdu
作者单位: 1INSA Lyon MATEIS Bat Saint Exupery 25 Av. Jean Capelle F-69621 Villeurbanne Cedex France
刊名: Fracture and Structural Integrity, 2017, Vol.11 (41), pp.191 - 196
来源数据库: Gruppo Italiano Frattura
DOI: 10.3221/IGF-ESIS.41.26
关键词: Short cracks3D propagationCrack closureSynchrotron X-ray tomographyForging
原始语种摘要: The influence of forging conditions on the propagation of physically small fatigue cracks has been studied for two high strength steels. Two surface conditions were produced after the forging process. The subsurface microstructure of the materials has been characterized by EBSD. Small samples extracted from the original specimens were used to perform in situ fatigue tests monitored by high resolution synchrotron X-ray tomography. Fatigue cracks were initiated from an artificial defect (100 m wide x 50 ᵵm deep) introduced in the forging skin by laser machining. 3D images of the initiation and growth of those physically small fatigue cracks have been obtained. It was found that the presence of a shot-blasted skin containing a hardness and microstructure gradient influences the 3D crack...
全文获取路径: Gruppo Italiano Frattura 

  • forging 锻造
  • steels 钢材
  • fatigue 疲劳
  • conditions 条件式
  • alloy 合金
  • physically 物理上
  • propagation 传播
  • microstructure 微结构
  • hardness 硬度
  • gradient 倾斜度