Changes with material properties of acoustic emission produced during single point machining

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:5594716

Heiple, C R; Carpenter, S H; Armentrout, D L

Acoustic emission was monitored during single point, continuous machining of 4340 steel and Ti-6Al-4V as a function of heat treatment. Acoustic emission produced during tensile and compressive deformation of these alloys has been previously characterized as a function of heat treatment. Heat treatments which increase the strength of 4340 steel increase the amount of acoustic emission produced during deformation, while heat treatments which increase the strength of Ti-6Al-4V decrease the amount of acoustic emission produced during deformation. If chip deformation were the primary source of acoustic emission during single point machining, then opposite trends in the level of acoustic emission produced during machining as a function of material strength would be expected for these two alloys. Trends in rms acoustic emission level with increasing strength were similar for both alloys, demonstrating that chip deformation is not a major source of acoustic emission in single point machining. The data suggest that sliding friction between the nose and/or flank of the tool and the newly machined surface is the primary source of acoustic emission. 10 refs., 11 figs., 4 tabs.

• Research Organization: EG and G Rocky Flats, Inc., Golden, CO (USA). Rocky Flats Plant
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC34-90DP62349
• OSTI ID: 5594716
• Report Number(s): RFP-4413; CONF-9010364--1; ON: DE91011913
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ACOUSTIC EMISSION TESTING
ACOUSTIC MONITORING
ACOUSTIC TESTING
ALLOYS
ALUMINIUM ALLOYS
DEFORMATION
FRICTION
HEAT TREATMENTS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MACHINING
MATERIALS TESTING
MECHANICAL PROPERTIES
MEETINGS
MONITORING
NONDESTRUCTIVE TESTING
SLIDING FRICTION
STAINLESS STEELS
STEELS
TENSILE PROPERTIES
TESTING
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
TOOLS
VANADIUM ALLOYS
WEAR