Effect of Ni on Microstructure and Mechanical Properties of Bulk Nanocrystalline Fe-Al Based Alloys Prepared by Aluminothermic Reaction

摘要：

　　Bulk nanocrystalline Fe-Al based alloys with 5,10 and 15 wt.% Ni were prepared by aluminothermic reaction.The alloys were analyzed by electron probe microanalyzer,X-ray diffraction and transmission electron microscope.Compressive yield strength and hardness of the alloys were tested.The experimental results showed that all of the alloys consisted of Fe-Al-Ni matrix and small amount of Al2O3 sphere.The matrix phases of the alloys with 5 and 10 wt.% Ni had disordered α-Fe solid solution,while the matrix phases of the alloys with 15 wt.% Ni had disordered α-Fe solid solution,NiAl phase and Fe3AlCx phase.Average grain sizes of the matrix phases of the alloys were about 20 nm.The alloys with 5 wt.% Ni had the best plasticity,but the alloys with 15 wt.% Ni had the highest yield strength and hardness.Yield strength of those alloys is higher than that of coarse-grained Fe3Al.

关键词： Mechanical properties Bulk nanocrystalline Aluminothermic reaction

作者: Peiqing La Yupeng Wei Yang Yang Hongding Wang Yaping Bai

作者单位: State Key Laboratory of New Nonferrous Materials, Lanzhou University of Technology,Lanzhou, 730050, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 715-721

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）