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总览 评价 刘洁 1, , 树学锋 2,* ( 1、 太原理工大学应用力学与生物医学工程研究所; 2、 太原理工大学应用力学与生物医学工程; ) 摘要: 使用机械研磨技术(SMAT)对AZ91D镁合金和纯镁进行表面纳米化处理,在材料表面形成厚度约为40μm的纳米层。分别
刘洁1,, 树学锋2,*
(
1、太原理工大学应用力学与生物医学工程研究所; 2、太原理工大学应用力学与生物医学工程; )
摘要:
使用机械研磨技术(SMAT)对AZ91D镁合金和纯镁进行表面纳米化处理,在材料表面形成厚度约为40μm的纳米层。分别对两种材料的纳米层、过渡层和基体进行纳米压痕实验,讨论表面纳米化处理对材料弹性模量和硬度的影响。结果表明:表面纳米化处理后材料表层弹性模量和硬度大大提高,在相同加载应变率ε ?=0.05/s和相同压深2000nm下,两种材料各层弹性模量为63.7GPa、52.6GPa、48.4GPa和48.2GPa、39.76GPa、37.78GPa硬度为1.902GPa、1.702GPa、1.396GPa和0.88GPa、0.668GPa、0.554GPa。
关键词:
机械研磨,纳米压痕,弹性模量,硬度
liujie1,, shuxuefeng2,*
(
1、Institute of Applied Mechanics and Biomedical Engineering TaiYuan University of Technology ; 2、TaiYuan University of Technology Institute of Applied mechanics and Biomedical Engineering.; )
Abstract:
the surface nanocrystallization of both AZ91D magnesium alloy and pure magnesium was conducted by Surface Mechanical Attrition Treatment(SMAT),which produced a nano-layer on the material surface, about 40μm thick. a series of nanoindentation tests were carried on the nano layers, transition layers, and matrix of AZ91D magnesium alloy and pure magnesium, respectively; and the influence of surface nanocrystallization on the modulus of elasticity and hardness was discussed. In the tests, the value of loading strain-rate and depth stable, ε ?=0.05/s and D=2000nm. The result showed that both modulus of elasticity and hardness have been increased dramatically, from the nano layers to the transition layer to the matrix ,values of elasticity modulus of two materials were 63.7GPa、52.6GPa、48.4GPa and 48.2GPa、39.76GPa、37.78GPa,while the values of hardness were 1.902GPa、1.702GPa、1.396GPa and 0.88GPa、0.668GPa、0.554GPa.
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