铸造2017，Vol.66Issue(12)：1326-1328,1332,4.
奥氏体球墨铸铁超低温冲击断裂行为研究
Study on Impact Fracture Behavior of Austenitic Ductile Iron Under Ultra-Low Temperature
摘要
Abstract
The ductile fracture mechanism of austenitic ductile iron under ultra-low temperature impact load was studied. The fracture behavior with temperature of austenitic ductile iron under impact load was studied. The energy of crack formation and crack propagation during the impact fracture were determined by the impact experiment. The impact absorption energy increase firstly and then decline in the trend with the decreasing of temperature, the metastable propagation energy is the main factor on low-temperature impact property. The microscopic mechanism of ductile fracture behavior at ultra-low temperature of austenitic ductile iron was also studied. Crack initiation and propagation of ductile fracture at different temperatures were analyzed by using in-situ fracture metallographic observation method.关键词
奥氏体球墨铸铁/低温冲击韧性/断口特征Key words
austenitic ductile iron/low temperature impact toughness/fracture characteristics分类
矿业与冶金引用本文复制引用
张新宁,姜珂..奥氏体球墨铸铁超低温冲击断裂行为研究[J].铸造,2017,66(12):1326-1328,1332,4.基金项目
辽宁省教育厅项目(L2016007). （L2016007）
