材料工程2024，Vol.52Issue(4)：127-137,11.DOI:10.11868/j.issn.1001-4381.2023.000528
时效析出强化对GW83镁合金摩擦磨损行为的影响
Effect of aging precipitation strengthening on friction and wear behavior of GW83 magnesium alloy
摘要
Abstract
In order to study the effect of aging strengthening on the wear mechanism and frictional deformation behavior of rare earth magnesium alloys,GW83(Mg-8Gd-3Y-0.5Zr,mass fraction/%)rare earth magnesium alloy was prepared by extrusion process.The electronic universal testing machine was used to evaluate the alloy's mechanical properties.The optical microscope(OM),scanning electron microscope(SEM),and transmission electron microscope(TEM)were used to examine the alloy's microstructure.The ball-on-disc dry sliding friction testing machine was used to examine the wear resistance.The results show that after aging treatment(T5),a large amount of β′ precipitated phases are precipitated in the alloy.The hardness and tensile strength of the alloy are 124.1HV and 420.31 MPa,respectively,which are significantly higher than those in the extruded state(O state).As the load increases,the friction coefficient of the alloy decreases and the wear rate increases.Aging treatment can significantly improve the wear resistance of GW83 alloy,which is related to changes in wear mechanism and degree of friction deformation.Under a load of 5-10 N,the main wear mechanisms of both samples are abrasion,oxidation,and adhesive wear.When the load increases to 20 N,the main wear mechanism of the O state sample changes to delamination wear,while the transition load of the T5 sample is 80 N.T5 heat treatment significantly reduces the degree of surface metal deformation and deformation layer thickness caused by friction,thereby reducing the generation of friction cracks.关键词
GW83镁合金/时效处理/微观组织/磨损行为Key words
GW83 magnesium alloy/aging treatment/microstructure/wear behavior分类
矿业与冶金引用本文复制引用
陈庆强,马冠杰,孙捷,孙幸子,于亚磊,李顺龙..时效析出强化对GW83镁合金摩擦磨损行为的影响[J].材料工程,2024,52(4):127-137,11.基金项目
国家自然科学基金资助项目(52001188) （52001188）
山东省自然科学基金青年基金项目(ZR2020QE161) （ZR2020QE161）
