Phase Stress Partition in Gray Cast Iron UsingIn SituNeutron Diffraction Measurements

Tu-Ngoc Lam, Szu-Chien Wu, Hobyung Chae, Shi-Wei Chen, Jayant Jain, Soo Yeol Lee, Ke An, Sven C. Vogel, Sung-Mao Chiu, Dunji Yu, E-Wen Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Gray cast iron comprises alpha-Fe, Fe3C and graphite with their different anisotropies in terms of structure and mechanical behavior. We perform two different deformation paths as tension-compression and compression-tension on bulk gray iron to capture the stress partitioning. Usingin situneutron diffraction, the composite-like deformation behaviors of alpha-Fe and Fe3C are revealed simultaneously. Within the elastic deformation stage, both deformation paths do not cause load transfer. However, when the applied compressive stress exceeds 300 MPa, there is a clear load sharing in both paths. From microscopic examinations, the debonding between matrix and graphite is clarified.

Keywords

  • SITU NEUTRON-DIFFRACTION
  • TEXTURE ANALYSIS
  • ELASTOPLASTIC DEFORMATION
  • MECHANICAL-PROPERTIES
  • RESIDUAL-STRESS
  • BEHAVIOR
  • MICROSTRUCTURE
  • AUSTENITE
  • EVOLUTION
  • STEELS

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