【作者】 李静； 吴飒建； 熊良银； 王永利； 杨英； 刘实；

【Author】 LI Jing;WU Sa-jian;XIONG Liang-yin;WANG Yong-li;YANG Ying;LIU Shi;Institute of Metal Research,Chinese Academy of Sciences;School of Materials Science and Engineering,University of Science and Technology of China;China Nuclear Power Technology Research Institute;

【机构】 中国科学院金属研究所； 中国科学技术大学材料科学与工程学院； 中广核研究院有限公司；

【摘要】 在内氧化方法制备ODS-FeCrAl合金的基础上,考察粉末氧化处理后加入8 h的球磨,其对合金微观组织和力学性能的影响。利用SEM、TEM和t-EBSD等检测方法对合金显微组织和孔隙率、氧化物析出相形貌和物相组成以及合金力学和韧脆转变性能进行分析研究,结果表明短时球磨大幅降低内氧化方法制备ODS合金的晶粒尺寸,降低合金的孔隙率,提高合金的高温力学强度,降低合金的韧脆转变温度。短时球磨在不增加合金氧、氮含量的同时,有效改善Y-Al-O氧化物弥散相的分布,而不影响氧化物相的组成。更多还原

【Abstract】 Based on the fabrication of oxide dispersion strengthened(ODS) FeCrAl alloy by internal oxidation method,the effect of ball milling for 8 h of oxidized powders on microstructure and mechanical properties of the alloy is investigated.The microstructure and porosity,the morphology and composition of nanometric oxide precipitates,and the mechanical properties and ductile-brittle transition properties of the alloy are analyzed by SEM,TEM and t-EBSD,respectively.The results show that short-time ball milling greatly reduce the grain size and porosity of ODS alloy.The hightemperature mechanical strength is improved and the ductile-brittle transition temperature is reduced.And short-term ball milling can effectively improve the distribution of Y-Al-O nanometric oxide dispersion without increasing the oxygen and nitrogen contents of the alloy,but does not affect the composition of the oxide phase.更多还原