法向载荷对Ti_(40)Zr_(10)Cu_(38)Pd_(12)块体非晶合金微米划痕和纳米压痕行为的影响  

Effect of Normal Load on Microscratch and Nanoindentation Behaviors of Ti_(40)Zr_(10)Cu_(38)Pd_(12) Bulk Amorphous Alloy

作　　者：杨开怀[1] 叶惠娟 花能斌 YANG Kaihuai;YE Huijuan;HUA Nengbin(School of Mechanical and Intelligent Manufacturing,Fujian Chuanzheng Communications College,Fuzhou 350007,China;Department of Materials Science and Engineering,Fujian University of Technology,Fuzhou 350118,China)

机构地区：[1]福建船政交通职业学院机械与智能制造学院,福州350007 [2]福建工程学院材料科学与工程学院,福州350118

出　　处：《机械工程材料》2022年第5期9-15,21,共8页Materials For Mechanical Engineering

基　　金：福建船政交通职业学院专业(群)领军人才培育项目(闽交院师[2022]8号);福建省高等职业院校应用技术协同创新中心建设项目(闽教科[2016]71号);福建省科技厅引导性项目(2021H01010258)。

摘　　要：采用微米划痕仪和纳米压痕仪研究了法向载荷对Ti_(40)Zr_(10)Cu_(38)Pd_(12)块体非晶合金微米划痕行为和纳米压痕行为的影响。结果表明:随着法向载荷从2 N提高到10 N,非晶合金划痕处的塑性变形由均匀逐渐变得局域化,引发多重剪切带的萌生和扩展,划痕宽度显著增大,并在划痕尾端形成磨屑堆积;随着法向载荷由1 mN提高到7 mN,非晶合金压痕处的塑性变形量逐渐累积,弹性模量和硬度下降,表现出应变软化现象,这与变形过程中剪切带自由体积增多有关。The effects of normal load on microscratch and nanoindentation behaviors of Ti_(40)Zr_(10)Cu_(38)Pd_(12) bulk amorphous alloy were investigated by using microscratch tester and nano-indenter. The results show that as the normal load increased from 2 N to 10 N, the plastic deformation at the scratches of the amorphous alloy gradually changed from uniform to localized, which led to the initiation and expansion of multiple shear bands, the scratch width increased significantly, and the accumulation of wear debris was formed at the end of the scratch. As the normal load increased from 1 mN to 7 mN, the plastic deformation at the indentation of the amorphous alloy gradually accumulated, and the elastic modulus and hardness decreased, manifesting as a strain softening phenomenon, which was related to the increase of free volume of the shear band during the deformation process.

关 键 词：块体非晶合金 微米划痕 纳米压痕 剪切带 

分 类 号：TG139.8[一般工业技术—材料科学与工程]