J Mater Sci Technol ›› 2000, Vol. 16 ›› Issue (04): 431-434.

• Research Articles • Previous Articles     Next Articles

The effect of Al and Fe on the intergranular embrittlement of Co3Ti alloys by hydrogen transport from the external surface

Xiaoying CHENG, Xiaojing WAN, Yexin CHEN, Meiyi YAO   

  1. Institute of Metallurgy and Materials Science, Shanghai University, Shanghai 200072, China
  • Received:1999-06-03 Revised:1999-08-08 Online:2000-07-28 Published:2009-10-10
  • Contact: Xiaoying CHENG

Abstract: Some observation relating tp the solubility, diffusivity and intergranular cracking by hydrogen transport from the external surface in Co3Ti, Co3Ti-Al and Co3Ti-Fe alloys have been carried out. The results show that the addition of alloying elements Al or Fe to Co3Ti alloy can increase the critical hydrogen concentration for changing from transgranular to brittle intergranular fracture, therefore suppress the moisture induced environmental embrittlement.

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