摘要
利用纳米压痕技术对单晶铝作压痕试验,获得载荷-压深的加载和卸载曲线。根据O liver-Pharr方法求出压头与测试材料之间接触表面的投影面积Ac和硬度值Hop。再利用原子显微镜(atom ic force m icroscopy,AFM)得到压痕的真实三维形貌图。结合M atlab对压痕进行分析,得到压痕的真实残余面积Aresidual,并计算出其硬度Hresidual。通过对两组单晶铝的硬度数据进行比较分析:在微纳米尺度下,两种方法计算得到的压痕硬度都存在压痕尺寸效应,Hresidual的压痕尺寸效应比Hop要更明显。
Nanoindentation experiments were made on single crYstal aluminium, and load-depth loading and unloading curves were obtained. The contact areas Ac and hardness Hop were obtained by Oliver-Pharr method. Real 3-dimension morphology images of residual indentation were obtained by atomic force microscopies（AFM）, and residual areas Aresidual and hardness Hresidual were calculated by combining Matlab software with AFM images. The comparison and analysis of Hop and Hresidual revealed that the two types of hardness had indentation size effect （ISE） in micro-nanoindentation but that the ISE of Hresidual Was more prominent than that of Hop.
出处
《机械科学与技术》
CSCD
北大核心
2006年第1期6-8,共3页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(59571263)
霍英东基金项目资助
关键词
纳米压痕
硬度
原子力显微镜
单晶铝
naoindentation
hardness
atomic force microscopy
single crystal aluminium
