Origin of acoustic emission produced during single point machining

Conference · Tue Jan 01 00:00:00 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: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC34-90DP62349
• OSTI ID: 5813082
• Report Number(s): RFP-4447; CONF-9106184-1; ON: DE91011915
• Resource Relation: Conference: International cost on acoustic emission in manufacturing, Berkeley, CA (USA), 12-14 Jun 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STAINLESS STEELS
MACHINING
TOOLS
ACOUSTIC MONITORING
ACOUSTIC EMISSION TESTING
ALUMINIUM ALLOYS
DEFORMATION
HEAT TREATMENTS
LEAD
MEETINGS
SLIDING FRICTION
STAINLESS STEEL-17-4PH
STAINLESS STEEL-304
TEFLON
TITANIUM BASE ALLOYS
VANADIUM ALLOYS
WEAR
ACOUSTIC TESTING
ALLOYS
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
ELEMENTS
FLUORINATED ALIPHATIC HYDROCARBONS
FRICTION
HALOGENATED ALIPHATIC HYDROCARBONS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATERIALS TESTING
METALS
MONITORING
NICKEL ALLOYS
NONDESTRUCTIVE TESTING
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLY
POLYETHYLENES
POLYTETRAFLUOROETHYLENE
STEEL-CR19NI10
STEELS
SYNTHETIC MATERIALS
TESTING
TITANIUM ALLOYS
360103* - Metals & Alloys- Mechanical Properties