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Deformation Behavior of Sintered Fe-C-Mn Composite During Cold Upset Forming

机译：Fe-C-Mn复合材料冷Up锻成形过程中的变形行为

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摘要

Experimental investigations were undertaken in order to understand the mechanism of deformation and densification behavior during cold upset forming operation on sintered Fe-C-Mn composite preforms of two initial aspect ratios 0.45 and 0.60. The preforms were prepared out of mixed elemental powders of Fe, C (0.05, 0.10, 0.15, and 0.20 %), and Mn (0.20 %) and compacted by 1 MN Universal Testing Machine with pressure of 1.1 GPa and then sintered in electrical muffle furnace for an hour and followed by cooling to room temperature in the furnace itself. The material properties of sintered Fe-C-Mn composite preforms were ascertained from the uniaxial compression test. Deformation experiments were carried out in several steps. Analysis of the experimental data showed an increasing trend in the attained density ratio with respect to the strain factor. Preforms having lower aspect ratio had enhanced densification qualities, compared to preforms possessing higher aspect ratio for any given initial preform density. The instantaneous Poisson's ratio with respect to the density ratio attained three distinct stages and approaches to the value of 0.50 of Poisson's ratio. Also an attempt has been made to find the relation between axial stress and axial strain with different aspect ratios and different percentage of carbon content.
机译：为了了解在两个初始纵横比为0.45和0.60的烧结Fe-C-Mn复合预成型坯上进行冷up锻成型过程中的变形和致密化行为的机理，进行了实验研究。由Fe，C（0.05、0.10、0.15和0.20％）和Mn（0.20％）的混合元素粉末制备预成型件，并通过1 MN Universal Testing Machine压制，压力为1.1 GPa，然后在马弗炉中烧结加热一个小时，然后在加热炉中冷却至室温。通过单轴压缩试验确定了Fe-C-Mn复合预成型坯的材料性能。变形实验分几个步骤进行。对实验数据的分析表明，相对于应变因子，达到的密度比有增加的趋势。与在任何给定的初始预成型坯密度下具有较高长径比的预成型坯相比，具有低纵横比的预成型坯具有增强的致密化质量。瞬时泊松比相对于密度比达到三个不同的阶段，并接近泊松比的0.50的值。还尝试寻找具有不同纵横比和不同碳含量百分比的轴向应力和轴向应变之间的关系。

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