采用真空电弧熔炼/退火制备了Cr/Al复合合金化Fe3Si基有序合金。通过XRD、SEM对试样进行表征,同时对其显微硬度、压缩强度及弯曲强度等力学性能进行了综合分析。结果表明,Cr/Al复合合金化Fe3Si基有序合金主相仍为Fe3Si相。元素Al,Cr复合合金化较为明显的改善了Fe3Si基有序合金的脆性。Fe65Si25Cr5Al5的抗压和抗弯强度最高,这是因自身高的有序度而呈现的陶瓷性的高强度低应变量特征。有序合金表现出明显的解理断裂特征,Fe80 Si10 Cr5Al5表现出二次解理的特征,Fe75 Si15 Cr5 Al5和Fe70 Si20 Cr5 Al5在断裂时出现了一些韧性特征的撕裂棱,这应与自身适中的有序度有关。
Fe3Si-based ordered alloys alloyed by Cr and Al were prepared by vacuum arc melting and annealing.The intermetallics were characterized by XRD and SEM.The mechanical property of the alloy was studied by microhardness test,compression test,and bending test.The results show that the main phase of the ordered alloys is Fe3Si.Brittleness of Fe3Si is significantly improved by Al and Cr alloying.Fe65Si25Cr5Al5 alloy exhibits the highest compressive strength and bend strength with lower strain due to its higher order degree compared with the other alloys.The fracture of the ordered alloys shows distinct cleavage fracture character.Fe80Si10Cr5Al5 alloy shows second brittle cleavage fracture feature.The fracture surface of Fe75Si15Cr5Al5 and Fe70Si20Cr5Al5 alloys presents the mixed characteristics of cleavage and quasi-cleavage fracture with some tearing ridges because of the moderate order degree.
参考文献
| [1] | B. Zuo;N. Saraswati;T. Sritharan .Production and annealing of nanocrystalline Fe-Si and Fe-Si-Al alloy powders[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):210-216. |
| [2] | Kalita M P C;Perumal A;Srinivasan A .Structural analysis of mechanically alloyed nanoerystalline Fe75 Si15 Al10 powders[J].Materials Letters,2007,61:842-826. |
| [3] | Schneeweiss O.;Jiraskova Y.;Zak T.;Cornut B.;Pizurova N. .Fe3Si surface coating on SiFe steel[J].Journal of Magnetism and Magnetic Materials,2000(0):115-117. |
| [4] | Cherigui, M;Feraoun, HI;Feninehe, NE;Aourag, H;Coddet, C .Structure of amorphous iron-based coatings processed by HVOF and APS thermally spraying[J].Materials Chemistry and Physics,2004(1):113-119. |
| [5] | Cherigui M;Feraoun H I;Feninehe N E et al.Microstructure and magnetic properties of Fe-Si-based coatings produced by HVOF thermal spraying process[J].Journal of Alloys and Compounds,2007,427:281-190. |
| [6] | Ehlers S K;Mendiratta M G .Tensile behaviour of two DO3-ordered alloy:Fe3 Si and Fe-2Oat% Al-5 at% Si[J].Journal of Materials Science,1984,19:2203-2210. |
| [7] | Won-Yong Kim;Shuji Hanada .Flow behavior and microstructures of large-grained Fe_3Si during high temperature deformation[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(1/2):219-227. |
| [8] | W.-Y.Kim;S.Hanada .Tensile elongation of off-stoichiometric Fe_3Si single crystals at high temperatures[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1/2):208-212. |
| [9] | J.H. Peng;G.L. Chen .EFFECT OF TESTING ENVIRONMENT ON FRACTURING BEHAVIOR OF Fe_3Si BASED ALLOY[J].Acta metallurgica Sinica,2003(2):104-109. |
| [10] | 潘丽梅,金吉男,林均品,王建国,王艳丽,林志,陈国良.硼元素对Fe-6.5%（质量分数）Si合金力学性能影响的试验研究[J].功能材料,2004(06):683-685. |
| [11] | 林均品;钟太彬;林志 等.Fe,Si基合金板材的制备技术[J].北京科技大学学报（自然科学版）,2001,23(05):442-444. |
| [12] | Keisuke Yamamoto;Yoshisato Kimura;Yoshinao Mishima .Phase constitution and microstructure of the Fe–Si–Cr ternary ferritic alloys[J].Scripta materialia,2004(7):977-981. |
| [13] | Zuo B;Sritharan T .Ordering and grain growth in nanoerystalline Fe75Si25 alloy[J].Acta Materialia,2005,53(04):1233-1239. |
| [14] | Bakker H;Zhou G F;Yang H .Mechanically driven disorder and phase transformations in alloys[J].Progress in Materials Science,1995,39:159-241. |
| [15] | M. Pugaczowa-Michalska;A. Go;L. Dobrzynski .Electronic structure and magnetism of Fe_(3-x)Cr_xSi alloys[J].Journal of Magnetism and Magnetic Materials,2003(1/3):46-53. |
| [16] | Hiroshi Usuba;Keisuke Yamamoto;Yoshisato Kimura .Phase equilibria and microstructures In the Fe-Si-Cr-Ti system[J].Intermetallics,2006(5):505-507. |
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