一、绪言作为衡量钢铁材料韧性,脆性的量,应用最广泛的是夏比冲击值。这除了因其简单、再现性好之外,还因早已普及这一历史原因。为此,夏比试验作为钢材的韧性指标,一直被用于研究、生产质量管理以及产品规格中。但是,随着近年破断力学的进步,人们认为评价结构件使用性能最适当的量应是破断韧性。现在,夏比试验只不过是一种质量管理试验,从根 First, the introduction As a measure of the toughness of steel materials, the amount of brittle, the most widely used is Charpy impact value. This is not only because of its simplicity, good reproducibility, but also because of the long history of this popularity. For this reason, the Charpy test as a toughness indicator of steel has been used for research, production quality control, and product specifications. However, with the improvement of fracture mechanics in recent years, it has been suggested that the most appropriate amount to evaluate the performance of structural members should be fracture toughness. Now, the Charpy test is nothing more than a quality control trial