不同温度对Inconel 718合金微动磨损行为的影响研究  

Effect of Temperature on Fretting Wear Behavior of Inconel 718 Alloy

作　　者：贺继樊 金津 刘建华 彭金方[3] 朱旻昊 HE Jifan;JIN Jin;LIU Jianhua;PENG Jinfang;ZHU Minhao(School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China;State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学材料科学与工程学院,四川成都610031 [2]西南交通大学机械工程学院,四川成都610031 [3]西南交通大学轨道交通运载系统全国重点实验室,四川成都610031

出　　处：《材料保护》2024年第10期1-10,26,共11页Materials Protection

基　　金：国家自然科学基金项目(52305215)资助。

摘　　要：Inconel 718高温合金在航空航天、燃气轮机和核电能源等领域有着广泛运用,为评价其在实际服役工况下的微动磨损性能,采用自主研制的高温微动磨损试验机开展切向微动磨损试验,研究并揭示不同环境温度下材料的微动运行行为、材料损伤响应和磨损机理。结果表明:环境温度对Inconel 718合金微动磨损区域特性及其损伤机理有较大影响。在不同位移幅值下,随着环境温度的升高,微动磨损均向完全滑移的方向转变。微动部分滑移区的磨损机制主要为黏着磨损,且随着温度的升高黏着加剧并在600℃转变为混合区。对于微动混合区或滑移区,其损伤机制由较低温度(室温和200℃)下的疲劳磨损主导转变为较高温度(400和600℃)下的黏着磨损和磨粒磨损主导,同时氧化磨损加剧。此外,环境温度的升高将不同程度加剧材料的微动损伤,其磨损率约为室温工况下的1.76~18.60倍,不同位移幅值下所导致最大磨损率的温度阈值亦不尽相同。研究结果为不同服役温度下Inconel 718合金的抗微动损伤防护提供了理论数据和应用参考。Inconel 718 superalloy has been widely used in the fields of aerospace,gas turbine and nuclear energy,etc.In order to evaluate its fretting wear performance under actual service conditions,tangential fretting wear tests of Inconel 718 superalloy at different temperatures were carried out by using a self-developed high temperature fretting wear rig.The micro motion behavior,material damage response and wear mecha-nism of materials at different environmental temperatures were studied and revealed.Results showed that the operating temperature had a great influence on the fretting wear characteristics and damage mechanism of the Inconel 718 alloy.Under different displacement amplitudes,the fret-ting wear shifted towards the direction of gross slip regime with the increase of ambient temperature.The wear mechanism of the fretting partial slip regime was mainly adhesive wear,the material adhesion intensified with the increase of temperature,and the fretting state changed to the mixed regime with the temperature rising to 600℃.In the fretting mixed regime or slip regime,the damage mechanism changed from fatigue wear at lower temperatures(room temperature and 200℃)to adhesive wear and abrasive wear at higher temperatures(400℃and 600℃),and the oxidation wear intensified.Moreover,the increase in ambient temperature would exacerbate the fretting damage of materials to varying degrees,and the wear rate at high temperature was about 1.76~18.60 times of that at room temperature.In addition,the temperature threshold for the maximum wear rate caused by different displacement amplitudes also varied.The research results provide theoretical data and application reference for anti-fretting damage protection of Inconel 718 alloy at different service temperatures.

关 键 词：Inconel 718合金 温度梯度 微动磨损 能量耗散 磨损机理 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程] TH117.1[机械工程—机械设计及理论]