采用Auger电子能谱仪测量了镍基高温合金GH4169中磷(P)的晶界偏聚量. 结果表明,经1020与1200℃固溶处理后在720℃时效2 h的样品, P的晶界偏聚浓度分别是0.344%与0.412%(原子分数). 晶界偏聚浓度随固溶处理温度的升高而升高. 基于这一实验结果, 确定了P在该合金中的非平衡晶界偏聚特性.
In virtue of Auger electron spectroscopy, it is found that the level of grain-boundary P segregation in GH4169 superalloy increases with the increase in solution treatment temperature. Based on this, the characteristic of NGS of P in superalloy is confirmed for the first time. The confirmation provides new theoretical and experimental basis for understanding the influence of P on mechanical properties of superalloys.
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