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用真空葛氏摆,研究了Fe-C+N-P合金系冷加工试样内耗。发现置换式固溶元素磷,强烈减低铁的S-K-K内耗(Q~(-1))、降低内耗峰温度(T_p)和明显减小其弛豫激活能(H)。在铁中磷的固溶限度以下,内耗峰高度(Q_h~(-1))随合金中磷浓度的三分之二次方(即位错线上磷浓度平方)C_p~(2/3)增加而线性减低。实验结果符合Schoeck理论。本文还讨论了内耗机制,认为它是非螺(包括刃)位错段拖曳Cottrell气团间隙溶质原子移动产生的。位错段运动以弯曲的方式进行。
With vacuum Ge’s pendulum, the internal friction of cold-worked Fe-C + N-P alloy was studied. It was found that substitutional solid solution elemental phosphorus strongly reduced S-K-K internal friction (Q ~ (-1)), reduced internal friction peak temperature (T_p) and significantly reduced its relaxation activation energy (H). Under the limit of the solid solution concentration of iron, the internal peak height (Q_h ~ (-1)) increases with C_p ~ (2/3) of the square third of the phosphorus concentration in the alloy (ie, the square of the phosphorus concentration in the dislocation line) While decreasing linearly. The experimental results accord with Schoeck’s theory. This article also discusses the internal friction mechanism, which is thought to be caused by the movement of solute atoms interspersed with non-spiral (including edge) dislocation segments that drag the Cottrell air masses. Dislocation segment movement in a curved manner.