硫对IN718合金蠕变性能的影响

Effect of sulfur on creep behavior of IN718 alloy

研究了常规和掺杂０．０２ｗｔ％硫的ＩＮ７１８合金的蠕变行为。结果表明，硫降低ＩＮ７１８合金的蠕变抗力，使表观蠕变激活能由６７８．５ｋＪ／ｍｏｌ减小到６３４．８ｋＪ／ｍｏｌ。计算表明。

The effect of sulfur on the creep behavior of IN718 alloy has been investigated.The results show that sulfur decreases the creep resistance of IN718 alloy.Increasing sulfur content to 0.02wt% causes a reduction of the aparent creep activation energy from 678.5kJ/mol to 634.8kJ/mol.The harmful effect mainly arises from the enhanced diffusion along grain boundary by sulfur.