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金属学报  1999 

磷在变形IN718合金中的作用

, PP. 387-391

Keywords: IN718合金,,晶界,扩散,持久试验,高温合金

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Abstract:

研究了磷在变形IN718合金中的作用,结果表明,磷显著改善了该合金的持久性能,明显延缓蠕变进程,添加0.02%磷可使表观蠕变激活能由678.6kJ/mol提高到746.1Kj/mol,晶界扩散激活能由276.1kJ/mol提高至349.8kJ/mol,磷的作用起因于降低晶界能而偏聚于晶界,从而抑制晶界扩散,降低晶界结合力.

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