3%Si-Fe合金屈服前的微应变研究

金属学报

1983, Vol. 19

Issue (1): 31-142

论文

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3%Si-Fe合金屈服前的微应变研究

周邦新

A STUDY OF THE PREYIELDING MICROSTRAIN IN 3%Si-Fe ALLOY

ZHOU Bangxin

引用本文:

周邦新. 3%Si-Fe合金屈服前的微应变研究[J]. 金属学报, 1983, 19(1): 31-142.
. A STUDY OF THE PREYIELDING MICROSTRAIN IN 3%Si-Fe ALLOY[J]. Acta Metall Sin, 1983, 19(1): 31-142.

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摘要: 用电解蚀刻显示滑移带的方法,研究了3％Si-Fe多晶体的微应变过程。分析了应力与已滑移变形的晶粒百分比,以及与已滑移变形晶粒中平均滑移带数目之间的关系,发现微应变可分为三个不同的阶段。将各微应变阶段的起始应力对晶粒直径平方根的倒数作图,可得到三条斜率不同的直线。联系Hall-Petch关系式的物理含意、Brown的微应变理论以及上屈服点理论,对实验结果进行了分析和讨论。

Abstract：The preyielding microstrain process in polycrystalline 3%Si-Fe has been investigated with the method of displaying slip bands through electrolytic etching. Three different microstrain stages were found after analysis of the relations between the stress and the percentage of yielding grain and the average number of slip band per yielding grain. Plotted the starting stress at each microstrain stage against the reciprocal square root of grain diameter, three straight lines with different slop were obtained. Consideration of the Hall-Peteh relation, the Brown's microstrain theory and the upper yield point theory, the experimental results were discussed.

收稿日期: 1983-01-18

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