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Microstructure and tribological property of selective laser melted Fe-Mn-Al-C alloy
Materials Letters ( IF 3 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.matlet.2020.127699
Xingchen Yan , Shuohong Gao , Cheng Chang , Hanlin Liao , Min Liu

Abstract To investigate the microstructure and tribological property, Fe-16Mn-10Al-1.5C alloy was fabricated via selective laser melting technology at different laser scanning speeds for the first time in this study. The results show that the microstructure of Fe-Mn-Al-C alloy is composed equiaxed grains and columnar dendrites. And this alloy is mainly composed of γ-Fe. This alloy has high microhardness and low coefficient of friction (COF). The microhardness of the SLM part increases with the decrease of the laser scanning speeds. The sample prepared at the highest speed not only has the lowest COF, but also the lowest wear rate amongst these SLM parts and its wear mechanism is mainly abrasive wear and adhesive wear. The wear mechanism of the samples V0.4 and V0.28 is not only abrasive wear but also adhesive wear that produces grooves, which generates a large number of grooves during the wear test.

中文翻译:

选择性激光熔化Fe-Mn-Al-C合金的组织和摩擦学性能

摘要 为了研究Fe-16Mn-10Al-1.5C合金的显微组织和摩擦学性能,本研究首次采用激光选区熔化技术在不同的激光扫描速度下制备了Fe-16Mn-10Al-1.5C合金。结果表明,Fe-Mn-Al-C合金的显微组织由等轴晶和柱状枝晶组成。而这种合金主要由γ-Fe组成。这种合金具有高显微硬度和低摩擦系数 (COF)。SLM 零件的显微硬度随着激光扫描速度的降低而增加。在这些SLM零件中,以最高速度制备的样品不仅具有最低的COF,而且磨损率也最低,其磨损机制主要是磨粒磨损和粘着磨损。V0.4和V0.28试样的磨损机理不仅是磨粒磨损,还有产生沟槽的粘着磨损,
更新日期:2020-07-01
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