有序态 Fe_3Al 合金在水环境中的磨粒磨损行为

Abrasive Wear of Ordered Fe 3Al Alloy in Water Environment

研究了不同载荷下含Ｃｒ的Ｂ２和ＤＯ３有序态Ｆｅ３Ａｌ合金在水中的磨粒磨损行为．采用扫描电镜分析了合金的磨损表面形貌和磨屑形貌．二次离子质谱分析结果表明：在水环境磨损条件下，随着载荷的增加，进入Ｆｅ３Ａｌ合金表层的氢浓度升高，合金表层的氢损伤加剧．在高载荷下由机械磨损所引起的材料流失仍占主导地位，相同载荷下Ｂ２有序态Ｆｅ３Ａｌ合金的磨损质量损失比ＤＯ３有序态Ｆｅ３Ａｌ合金低．

The wear behavior of B 2 ordered and DO 3 ordered Fe 3Al alloys containing Cr in water environment was studied. The morphology of the worn surface and the wear debris was investigated using SEM. SIMS analysis indicated that the concentration of hydrogen penetrating into the surface layer increased under abrasion. With increasing applied load, the surface layer of Fe 3Al alloy suffered severe hydrogen attack during abrasion. Both ordered Fe 3Al alloys revealed a synergism between hydrogen attack and wear. Wear of Fe 3Al alloys in water was characteristic of plastic deformation, pitting,cracking,and brittle fracture. The mechanical removal of Fe 3Al alloy was dominant at higher load in the wear process. The wear mass loss of B 2 ordered Fe 3Al was slightly lower than that of DO 3 ordered alloy at the same load.