Boron effects on the ductility of a nano-cluster-strengthened ferritic steel

Z. W. Zhang, C. T. Liu*, S. Guo, J. L. Cheng, G. Chen, Takeshi Fujita, M. W. Chen, Yip Wah Chung, Semyon Vaynman, Morris E. Fine, Bryan A. Chin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


The mechanical properties of Cu-rich nano-cluster-strengthened ferritic steels with and without boron doping were investigated. Tensile tests at room temperature in air showed that the B-doped ferritic steel has similar yield strength but a larger elongation than that without boron doping after extended aging at 500 °C. There are three mechanisms affecting the ductility and fracture of these steels: brittle cleavage fracture, week grain boundaries, and moisture-induced hydrogen embrittlement. Our study reveals that boron strengthens the grain boundary and suppresses the intergranular fracture. Furthermore, the moisture-induced embrittlement can be alleviated by surface coating with vacuum oil.

Original languageEnglish (US)
Pages (from-to)855-859
Number of pages5
JournalMaterials Science and Engineering A
Issue number3
StatePublished - Jan 25 2011


  • Boron doping
  • Ductility
  • Ferritic steel
  • Moisture-induced embrittlement
  • Nano-cluster

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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