摘要
采用球-盘式摩擦磨损试验机进行干燥、去离子水、模拟雨水3种环境和3种载荷(5,10,15N)下的正交实验,对比了两种不同结构的高熵合金材料在不同环境、不同载荷下的服役情况,对合金的摩擦磨损性能进行了探索。利用X射线衍射仪、白光干涉仪、光学显微镜以及扫描电子显微镜分别测试样品的物相组成,观察磨痕轮廓,分析合金的金相组织和表面磨损形貌,并对其磨损机理进行了分析。结果表明:Al_(1.3)CrCuFeNi_2合金耐磨性明显优于AlCrCuFeNi2合金。Al_xCrCuFeNi_2合金在液体环境中耐磨性更好。合金在干摩擦条件下,摩擦机理主要为氧化、黏着磨损,塑性变形和磨粒磨损。在水中,磨粒磨损起主导作用,同时具有氧化、腐蚀和轻微的黏着现象。
Orthogonal test was carried out with ball-on-disc friction and wear tester in dry,deionized water,and simulated rain water under three loads(5,10,15N),respectively.The behavior of two materials at different loads under different environment was compared,the friction and wear proper-ties of the alloys under the simulated service situation was explored.The composition of the samples was examined by X-ray diffraction(XRD).The contour of wear scars was detected by a three-dimen-sional surface profiler based on scanning white light interferometry.Optical electron microscope is used to observe the structure.The morphology of the worn surfaces were observed by scanning elec-tron microscopy(SEM)and the wear mechanism was analyzed.Results show that due to the increase of A1,the body-centered cubic phase(bcc)substitutes the face-centered cubic(fee)which attributed to the high hardness of A11.3 CrCuFeNi2 leading to good wear property.In dry condition,the wear mechanism are oxidation,adhesion,plastic deformation,and mild abrasive wear while in liquid,the abrasive is dominated along with oxidation and slight adhesive behavior.
作者
刘用
马胜国
刘英杰
张腾
杨慧君
LIU Yong;MA Sheng-guo;LIU Ying-jie;ZHANG Teng;YANG Hui-jun(Research Institute of Surface Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Institute of Applied Mechanics and Biomedical Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2018年第2期99-104,共6页
Journal of Materials Engineering
基金
国家自然科学基金项目(51401141)
山西省自然科学基金项目(2015021006)
关键词
高熵合金
摩擦磨损
组织结构
表面形貌
high-entropy alloy
friction and wear
structure
surface morphology
