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,硫的危害主要来源于其对晶界扩散的促进作用.
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