Diffraction-based Residual Stress Mapping of a Stress Frame of Gray Iron via Vibratory Stress Relief Method

Shi Wei Chen*, E. Wen Huang, Sung Mao Chiu, Mark Reid, Cheng Yen Wu, Anna M. Paradowska, Tu Ngoc Lam, Yu Hao Wu, Soo Yeol Lee, Shao Chien Lu, Shin An Chen, Yan Gu Lin, Shih Chang Weng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The role of residual stress is critical, particularly for machine tools demanding accuracy below 1 µm. Although minor stresses are subjected to a tiny area, the applied force can cause devastating distortions on the precision components at this length scale. In this research, we systematically investigated the residual stress in a stress frame of the gray iron used in machine tools using synchrotron X-ray and neutron sources. Through the combination of these techniques, the residual stresses on the surface, inside the bulk, and in average were presented. Comprehensive analysis results shed light on the vibratory stress relief technique, which reduced the residual stresses and stabilized them, even materials undergoing cycling heating. Although compressive stresses are not effectively reduced, this technique is useful in improving the mechanical stability of the materials in machine tools.

Original languageEnglish
Article number859342
JournalFrontiers in Materials
StatePublished - 7 Apr 2022


  • gray iron
  • machine tools + design
  • neutron diffraction
  • residual stress
  • synchrotron X-ray


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