Micro-machinability of bulk metallic glass in ultra-precision cutting

被引：63

作者：

Chen, Xiao ^{[1
]}

Xiao, Junfeng ^{[1
]}

Zhu, Yan ^{[1
]}

Tian, Ruiji ^{[1
]}

Shu, Xuewen ^{[2
]}

Xu, Jianfeng ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Digital Mfg Equipment & Technol, Sch Mech Sci & Engn, Wuhan 430074, Hubei, Peoples R China

[2] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China

来源：

MATERIALS & DESIGN | 2017年 / 136卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Bulk metallic glass; Ultra-precision cutting; Machinability; Surface roughness; Microstructure; TOOL WEAR; TRANSITION TEMPERATURE; MECHANICAL-PROPERTIES; SURFACE INTEGRITY; COMPOSITES; TITANIUM; BEHAVIOR; ALLOYS; CONDUCTIVITY; ROUGHNESS;

D O I：

10.1016/j.matdes.2017.09.049

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mirco-machinability of Zr55Cu30Al10Ni5 bulk metallic glass including surface integrity, cutting force, chip morphology, and toolwearwas investigated by means of ultra-precision cuttingwith a diamond tool and a boron nitride tool. The results showed that the metallic glass only attained the lowest surface roughness of about R-a 100 nm and was difficult to cut to achieve a mirror surface due to its viscous flow even using a depth of cut of 0.6 mu m. An empirical metal micro-cutting force model was applicable for the bulk metallic glass only under the condition that the undeformed chip thickness was larger than the tool edge radius. The diamond tool showed a better wear resistance but a worse machined surface quality as compared to the PCBN tool. TEM observation and nanoindentation analysis indicated that nanocrystallization of the metallic glass and work softening were detected after the micro-machining. Besides, the generation of shear bands and its effect on the machinability of the bulk metallic glass were disscussed. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：1 / 12

页数：12

共 63 条

[1] An empirical tool force model for precision machining [J].