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Effect of Interstitial Elements on Hall-Petch Coefficient of Ferritic Iron

机译:间隙元素对铁素体霍尔-Petch系数的影响

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摘要

Yield strength was investigated in iron with different grain size and different contents of carbon and nitrogen. The Hall-Petch coefficient; k_y is originally very small in high purity iron (about 100 MPa·μm~(1/2)) but it increases with increasing the amount of solute carbon content. The value of k_y is enlarged to around 550 MPa·μm~(1/2) by 60 ppm of solute carbon and levels off at around 600 MPa·μm~(1/2) in the region above 60 ppm solute carbon. On the other hand, nitrogen hardly influences the k_y value. The mechanism of the change in Hall-Petch coefficient was then discussed in terms of the grain boundary segregation of carbon and nitrogen atoms.
机译:研究了具有不同晶粒尺寸和碳和氮含量的铁的屈服强度。霍尔获取系数; k_y最初在高纯铁中很小(约100 MPa·μm〜(1/2)),但随着溶质碳含量的增加而增加。通过60 ppm的固溶碳将k_y的值扩大到550 MPa·μm〜(1/2)左右,在60 ppm的固溶碳以上的区域将k_y的值稳定在600 MPa·μm〜(1/2)左右。另一方面,氮几乎不影响k_y值。然后根据碳和氮原子的晶界偏析讨论了霍尔-Petch系数变化的机理。

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