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Effect of Dispersoids on Tensile Deformation of Fe-20Cr ODS Alloys

机译：弥散体对Fe-20Cr ODS合金拉伸变形的影响

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摘要

Tensile deformation properties of nine kinds of mechanically alloyed Fe-20Cr-based oxide dispersion strengthened (ODS) steels were examined over a temperature range from 300 to 1 073 K. One of the specimens used was an alloy without any addition of oxide and the others were eight kinds of ODS alloys with the addition of Y_2O_3, Al_2O_3, SiO or ZrO_2. All of the alloys had fine grain structures. With the addition of Y_2O_3 the 0.2% yield stress of Fe-20Cr alloys increased all over the temperature range, and the work-hardening following the yield at 300 and 673 K also increased considerably. But at higher temperatures than 673 K, the increment of work hardening due to the oxide dispersion was small. Fracture elongation at 673 K was found to be about 5%, while those at 873 and 1 073 K were more than 17%. The dispersion strengthening due to the other oxides, Al_2O_3, SiO and ZrO_2 were very small except that of ZrO_2 at 1 073 K.
机译：在300至1073 K的温度范围内，对9种机械合金化的Fe-20Cr基氧化物弥散强化（ODS）钢的拉伸变形性能进行了测试。使用的一个试样是不添加氧化物的合金，而其他试样是是八种ODS合金，添加了Y_2O_3，Al_2O_3，SiO或ZrO_2。所有合金均具有细晶粒结构。随着Y_2O_3的添加，Fe-20Cr合金在整个温度范围内的0.2％屈服应力均增加，并且在300 K和673 K下屈服后的加工硬化也显着增加。但在高于673 K的温度下，由于氧化物分散而导致的加工硬化增量很小。发现673 K处的断裂伸长约为5％，而873和1073 K处的断裂伸长超过17％。除了在1,073 K处的ZrO_2以外，其他氧化物Al_2O_3，SiO和ZrO_2引起的分散增强很小。

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