Microstructure and mechanism of adiabatic shear fracture during serrated chip formation of hard machining

The formation and development of serrated chip morphology and adiabatic shear bands (ASBs) and the microstructure of fracture surfaces in the serrated chips during hard machining of hardened alloy steel are observed, the mechanism of adiabatic shear fracture is analyzed. The observation and analysis...

Full description

Saved in:
Bibliographic Details
Published inJournal of Advanced Mechanical Design, Systems, and Manufacturing Vol. 8; no. 6; p. JAMDSM0074
Main Authors DUAN, Chunzheng, WANG, Minjie
Format Journal Article
LanguageEnglish
Published The Japan Society of Mechanical Engineers 01.01.2014
Subjects
Adiabatic shear band
Adiabatic shear fracture
Hard machining
Microstructure
Serrated chip
Online AccessGet full text

Cover

More Information
Summary:The formation and development of serrated chip morphology and adiabatic shear bands (ASBs) and the microstructure of fracture surfaces in the serrated chips during hard machining of hardened alloy steel are observed, the mechanism of adiabatic shear fracture is analyzed. The observation and analysis indicate that the cutting speed has significant influence on the transformation of chip morphology and microscopic morphology of ASBs, the material properties can significantly influence on microstructural pattern of fracture surfaces and fracture mechanism during serrated chip formation. The ductile damage fracture induced by adiabatic shear has decisive effect on serrated chip formation, a microcosmic model of adiabatic shear ductile fracture during hard machining including nucleation, growth, coalescence and fracture of microvoids within ASB is proposed.
ISSN:1881-3054
1881-3054
DOI:10.1299/jamdsm.2014jamdsm0074