本文研究了不同W和Co含量的Ni-20Cr基合金的高温稳态蠕变行为。结果表明,W和Co均可提高合金的蠕变激活能Q_c,它服从Q_c=Ae~(kx/lge的关系.Ni-Cr-Co-W合金的稳态蠕变速率(?)_s也服从(?)_s=Cσ~mexp(-Q_c/RT)的关系。还指出,Ni-Cr-Co-W合金的稳态蠕变速率(?)_s与堆垛层错能γ之间,有(?)_s ∝γ~(1.4)的关系。
The steady state creep behaviour of the Ni-20Cr base alloys with various contents of W and Co has been investigated in the temperature range of 940 to 1040℃. Both W and Co may raise the activation energy for creep, Qo, obeyed the relationship:Q_c=Ae~(kx/lg~(?)) where x is the atomic fraction of W or Co additions; A is a constant for the alloy composition and k is equal to 7.0 and 0.55 for W and Co additions respectively. The steady state creep rate (?)_s of Ni-Cr-Co-W alloys was predicated to be:(?)_s=Cσ~m exp (-Q_e/RT) where m=6.45±0.10 or 5.3 depending on whether μ phase is present or not. It was also shown that the (?)_s varies with the stacking fault energy γ according to the correlation:(?)_s∞γ~(1.4)
参考文献
| [1] | 陈篪,邓枝生,吴伯群,丁树深,物理学报,23(1974) ,69．屯王 |
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