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摘要: 使用平面爆轰波起爆元件起爆TNT炸药，分别对DT2工业纯铁和HR2抗氢钢楔形样品进行了冲击加载实验。在回收样品中，DT2纯铁表现为宏观不规则破坏，而HR2钢仅在样品内部沿加载面约45角和垂直方向出现了宏观裂纹。通过金相组织观察、显微硬度分布测量，结合数值计算，表明DT2纯铁样品在距加载面约2 mm范围内产生了不完全-相变，在HR2钢中未发生相变。不完全相变可能是导致两种材料宏观破坏特征差异的因素。Abstract: Planar detonation wave was generated to load the DT2 iron and HR2 steel cuneal sample by detonating TNT. Macroscopical crack perpendicular or 45 angle to the load interface was found in recovered HR2 steel sample and irregular fracture at back surface was found in recovered DT2 iron sample. Metallographic structure observation, microhardness measurement of recovered sample and numerical simulation indicate that there was no shock-induced phase transition in HR2 steel but local incomplete phase transition in DT2 iron. The failure difference between the two materials may be caused by local incomplete phase transition.
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Key words:
- shock induced phase transition /
- DT2 iron /
- HR2 steel /
- metallurgical analysis /
- microhardness
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