Antiphase boundary energies and the transition from shearing to looping in alloys strengthened by ordered precipitates
Antiphase boundary energies and the transition from shearing to looping in alloys strengthened by ordered precipitates
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有序析出物强化合金中的反相边界能和从剪切到循环的转变
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
J. Huang
中科院分区：
文献类型：
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作者：
A. Ardell;J. Huang
强有序共格相强化合金变形过程中剪切向环状转变的临界颗粒直径<d>max与析出相{111}面上的反相界能有关。对这一过程的理论分析预测了−‘(Al3Li)相和δ’(Ni3Al)相的平均APB能量分别为0.112±0.030和0.161±0.024 JMγ‘(Ni3Al)。δ‘相的测定值比几乎所有其他方法测得的值低约25%，而γ’相的测定值则高出约15%。目前的分析方法比Glazer和Morris最近提出的理论更可靠。然而，由于<d>max不能以与其他量相同的精度测量，因此有人认为，通过对含有有序共格相的合金的沉淀硬化的其他数据的分析，可以提取更准确的APB能量。
Abstract The critical particle diameter for the transition from shearing to looping, 〈d〉max, during deformation of alloys strengthened by strong ordered coherent precipitates is related to the antiphase boundary (APB) energy on the {111} planes of the precipitate phase. Theoretical analysis of this process pedicts average APB energies of 0·112±0·030 and 0·161±0·024 Jm−2 for the δ′ (Al3Li) and γ′ (Ni3Al) phases respectively. The value for the δ′ phase is about 25% lower than those determined by nearly all other methods, while that for the γ′ phase is about 15% higher. The present method of analysis is more reliable than that of a recent theory proposed by Glazer and Morris. However, because 〈d〉max cannot be measured with the same degree of precision as other quantities, it is argued that more accurate APB energies can be extracted from the analysis of other data on precipitation hardening of alloys containing ordered coherent precipitates.