摘要
探讨了不同Mn含量对Fe3Al金属间化合物在25~800℃下拉伸性能的影响;并就Mn对Fe3Al合金化后的组织变化以及其对拉伸性能与断裂特征的影响进行了分析,结果表明,由于Mn对Fe3Al的合金化,而引入的具有面心立方有序结构的近L12γ相,对Fe3Al的组织结构及拉伸性能产生了很大影响;随着Mn含量的增加,合金中DO3相的有序度降低;当Mn加入量适当时,可显著提高Fe3Al的室温强度和塑性,及合金的中高温塑性,但中高温强度衰减较大;总的说来,10%Mn合金其塑性显著提高,室温强度大幅度提高,中高温强度与Fe3Al相当.
The effects of different additions of Mn on the tensile properties,microstructures variation and fracture behaviour of Fe3Al intermetallic compound at the temperatures from 25 to 800℃ have been studied in the present paper.It is shown that the remarkable influence of microstructure and tensile properties of Fe3Al can be resulted from Mn alloying by means of introducing a L12like phase γ with FCC ordered structure;the ordered extent of DO3 phase in Fe3Al alloy can be reduced with the increasing of Mn addition;when a certain amount of Mn is added,the strength and ductility of Fe3Al at the room temperature and its ductility at medium and high temperatures can be remarkedly increased,but its strength at high temperatures can be decreased considerably.In summary,the ductility and strength at room temperature of the alloy containing 10%Mn can be increased obviously,its strength at medium and high temperatures is similar to that of Fe3Al without alloying element.
出处
《西安工业学院学报》
1997年第4期304-308,共5页
Journal of Xi'an Institute of Technology
关键词
FE3AL
金属间化合物
拉伸性能
锰
Fe3Al intermetallic compound Mn element tensile properties