TY - JOUR
T1 - Micro-machinability of bulk metallic glass in ultra-precision cutting
AU - Chen, Xiao
AU - Xiao, Junfeng
AU - Zhu, Yan
AU - Tian, Ruiji
AU - Shu, Xuewen
AU - Xu, Jianfeng
PY - 2017/12/15
Y1 - 2017/12/15
N2 -
Mirco-machinability of Zr
55
Cu
30
Al
10
Ni
5
bulk metallic glass including surface integrity, cutting force, chip morphology, and tool wear was investigated by means of ultra-precision cutting with 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 μm. 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.
AB -
Mirco-machinability of Zr
55
Cu
30
Al
10
Ni
5
bulk metallic glass including surface integrity, cutting force, chip morphology, and tool wear was investigated by means of ultra-precision cutting with 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 μm. 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.
KW - Bulk metallic glass
KW - Machinability
KW - Microstructure
KW - Surface roughness
KW - Ultra-precision cutting
UR - http://www.scopus.com/inward/record.url?scp=85029803525&partnerID=8YFLogxK
UR - https://www.sciencedirect.com/science/article/pii/S0264127517308948?via%3Dihub
U2 - 10.1016/j.matdes.2017.09.049
DO - 10.1016/j.matdes.2017.09.049
M3 - Article
AN - SCOPUS:85029803525
SN - 0264-1275
VL - 136
SP - 1
EP - 12
JO - Materials and Design
JF - Materials and Design
ER -