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首页> 外文期刊>Journal of Materials Engineering and Performance >Forming-Limit Diagrams for Magnesium AZ31B and ZEK100 Alloy Sheets at Elevated Temperatures
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Forming-Limit Diagrams for Magnesium AZ31B and ZEK100 Alloy Sheets at Elevated Temperatures

机译：高温下AZ31B和ZEK100镁合金板材的成形极限图

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摘要

Modern design and manufacturing methodologies for magnesium (Mg) sheet panels require formability data for use in computer-aided design and computer-aided engineering tools. To meet this need, forming-limit diagrams (FLDs) for AZ31B and ZEK100 wrought Mg alloy sheets were developed at elevated temperatures for strain rates of 10~(-3) and 10~(-2) s~(-1). The elevated temperatures investigated range from 250 to 450℃ for AZ31B and 300 to 450℃ for ZEK100. The FLDs were generated using data from uniaxial tension, biaxial bulge, and plane-strain bulge tests, all carried out until specimen rupture. The unique aspect of this study is that data from materials with consistent processing histories were produced using consistent testing techniques across all test conditions. The ZEK100 alloy reaches greater major true strains at rupture, by up to 60%, than the AZ31B alloy for all strain paths at all temperatures and strain rates examined. Formability limits decrease only slightly with a decrease in temperature, less than 30% decrease for AZ31B and less than 35% decrease for ZEK100 as the temperature decreases from 450 to 300℃. This suggests that forming processes at 250-300℃ are potentially viable for manufacturing complex Mg components.
机译：镁（Mg）薄板的现代设计和制造方法需要可成形性数据，以用于计算机辅助设计和计算机辅助工程工具。为了满足这一需求，在高温下以10〜（-3）和10〜（-2）s〜（-1）的应变速率开发了AZ31B和ZEK100变形Mg合金板的成形极限图（FLD）。 AZ31B的升高温度范围为250至450℃，ZEK100的升高温度范围为300至450℃。 FLD是使用单轴拉伸，双轴凸起和平面应变凸起测试的数据生成的，所有这些操作都进行到样品破裂为止。这项研究的独特之处在于，在所有测试条件下，使用一致的测试技术从具有一致的加工历史的材料中获得数据。在所有温度和应变速率下，在所有应变路径下，ZEK100合金在断裂时的主要真实应变都比AZ31B合金大多达60％。随着温度的降低，可成形性极限仅随温度的降低而略有降低，对于AZ31B，当温度从450降至300℃时，其可塑性极限仅降低30％以下，而对于ZEK100，其可塑性极限降低35％以下。这表明在250-300℃的成型工艺对于制造复杂的Mg部件可能是可行的。

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