【摘要】 研究了高矫顽力型FeCrCo合金力学性能和微观结构间的关系.对抗弯强度和断裂韧性的测试结果表明,高矫顽力型FeCrCo合金的力学性能远低于普通FeCrCo合金.透射电镜照片显示高矫顽力合金的两相成分差较大;x射线衍射结果反映高矫顽力合金衍射峰强度较弱而半高宽较大,说明高矫顽力合金中调幅分解进行彻底.合金中α1,α2两相成分差的扩大使晶格错配度增加,强度提高,韧性降低.这就是高矫顽力合金力学性能变差的原因.更多还原

【Abstract】 In this paper,the relationship between the mechanical properties and the microstructure of a high-coercivity FeCrCo alloy was studied.Measurements on bending strength and fracture toughness showed that the mechanical properties of the high-coercivity FeCrCo alloy are much lower than the conventional FeCrCo alloy.TEM micrographs showed that the composition contrast between the two phases in the high-coercivity alloy is larger;XRD results indicated that the peak intensities of the high-coercivity alloy is lower and the half-peak-width is larger,which indicated that the spinodal decomposition processes are more successfully in the high-coercivity alloy.The enlargement of the composition contrast between α-1 and α-2 leads to the increase of crystal mismatch,the strength of the alloy improved,but the ductility deteriorated,that is the reason why the mechanical properties of the high-coercivity alloy is poor.更多还原