Origin of acoustic emission produced during single point machining

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5813082

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. Acoustic emission has also been monitored as a function of machining parameters on 6061-T6 aluminum, 304 stainless steel, 17-4PH stainless steel, lead, and teflon. 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. Changes in acoustic emission with tool wear were strongly material dependent. 21 refs., 19 figs., 4 tabs.

• Research Organization: EG and G Rocky Flats, Inc., Golden, CO (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC34-90DP62349
• OSTI ID: 5813082
• Report Number(s): RFP-4447; CONF-9106184--1; ON: DE91011915
• 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
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
DEFORMATION
ELEMENTS
FLUORINATED ALIPHATIC HYDROCARBONS
FRICTION
HALOGENATED ALIPHATIC HYDROCARBONS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HEAT TREATMENTS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
LEAD
MACHINING
MATERIALS
MATERIALS TESTING
MEETINGS
METALS
MONITORING
NICKEL ALLOYS
NONDESTRUCTIVE TESTING
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLY
POLYETHYLENES
POLYTETRAFLUOROETHYLENE
SLIDING FRICTION
STAINLESS STEEL-17-4PH
STAINLESS STEEL-304
STAINLESS STEELS
STEEL-CR19NI10
STEELS
SYNTHETIC MATERIALS
TEFLON
TESTING
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
TOOLS
VANADIUM ALLOYS
WEAR