| 应力和应变状态对球化20钢中微空洞萌生和长大的影响 |
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| 引用本文： | 胡社军.应力和应变状态对球化20钢中微空洞萌生和长大的影响[J].工业工程,1994(1). |
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| 作者姓名： | 胡社军 |
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| 摘 要： | 本文用定量金相测量了球化２０钢制光滑与缺口试样在拉伸变形不同阶段中微空洞的体积分数ｆｒ和单位面积上的做空洞个数ＮＡ，分析了三轴应力和有效塑性变形对微空洞萌生和长大的影响．作者认为，用一组原始形状不同的试样进行变形，在每个试样上取一个区域测量空洞数量并计算相应的应力应变．用这种方法验证Ｒｉｃｅ－Ｔｒａｃｅｙ关于空洞长大速率的公式是不合适的。
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| 关 键 词： | 微空洞 定量金相 三轴应力 有效塑性应变 |
EFFECT OF TRIAXIAL STRESS AND EFFECTIVE PLASTIC STRAIN ON INITIATION AND GROWTH OF MICROVOIDS IN THE STEEL |
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| Hu Shejun.EFFECT OF TRIAXIAL STRESS AND EFFECTIVE PLASTIC STRAIN ON INITIATION AND GROWTH OF MICROVOIDS IN THE STEEL[J].Industrial Engineering Journal,1994(1). |
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| Authors: | Hu Shejun |
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| Affiliation: | Dept. of Metal Material Set6nce & Refrigeration Engineering |
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| Abstract: | Tensile tests on smooth and axisymmetrically notched specimens of spheroidizedsteel of 0. 2% carbon content were carried out and interrupted at various strains,thus aseries of volume percentages of voids and the number of voids per unit area were measured in method of quantitative metallography. Effect of triaxial stress and effectiveplastic strain on initiation and growth of microvoids in the steel was discussed. The author of this paper believes that the experiment method which a series of specimen of different shape were deformed, void quantities were measured,and stress and strain weredetermined only in one zone in every specimen is not right in order to verify the voidgrowth rate equation proposed by Rice--Tracey. |
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| Keywords: | microvoids quantitative metallography triaxial stress effective plasticstrain |
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