Low Ductility at Elevated Temperatures of the Cryogenic and Non-magnetic Steel Fe-23Mn-4Al-SCr-0.3C
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG1992年第5期
论文作者：田兴 张彦生
文章页码：369 - 375
摘 要：<正> The origin of low ductility at elevated tempera-ture in the cryogenic and non-magnetic steelFe-23Mn-4Al-5Cr-0.3C was investigated bymeans of impact test at elevated temperatures,opti-cal microscope,SEM and TEM.The experimentalresults indicate that the impact toughness lowerswith increasing testing temperature,and exhibits alow trough of ductility from 865℃ to 1050℃ and apeak value at 1150℃.The intergranular fractureoccurs in the temperature region of low ductilityand the transgranular ductile rupture below this re-gion principally.There is a process of precipitating,gathering,growing,and dissolution of carbide（FeMnCr）23C6 and AlN between 500℃ and1000℃.The coalescence of microvoids caused bythe process at grain boundaries results in theintergranular fracture and the low ductility at ele-vated temperatures.
田兴，张彦生
摘 要：<正> The origin of low ductility at elevated tempera-ture in the cryogenic and non-magnetic steelFe-23Mn-4Al-5Cr-0.3C was investigated bymeans of impact test at elevated temperatures,opti-cal microscope,SEM and TEM.The experimentalresults indicate that the impact toughness lowerswith increasing testing temperature,and exhibits alow trough of ductility from 865℃ to 1050℃ and apeak value at 1150℃.The intergranular fractureoccurs in the temperature region of low ductilityand the transgranular ductile rupture below this re-gion principally.There is a process of precipitating,gathering,growing,and dissolution of carbide（FeMnCr）23C6 and AlN between 500℃ and1000℃.The coalescence of microvoids caused bythe process at grain boundaries results in theintergranular fracture and the low ductility at ele-vated temperatures.
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