STRENGTHENING MECHANISMS DURING THE HEAT TREATMENT OF THREE TITANIUM ALLOYS - TI-6AL-4V, TI-6AL-6V-2SN, AND TI-8AL-1MO-1V.

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Abstract:

The effects of solution and aging treatments on the Alloys Ti-6Al-4V, Ti-6Al-6V-2Sn, and Ti-8Al-1Mo-1V were investigated by hardness measurements, electron microscopy, resistance measurements at the aging temperatures, and X- ray diffraction. Relatively small changes in alloy content have a marked effect on the strengths attainable by heat treatment. Two hardening mechanisms account for all the observed responses to heat treatment. These mechanisms are the decomposition of the transformed beta phase either during the quench from the solution temperature or as the result of subsequent aging and the precipitation of aluminum-rich alpha-2 in the primary alpha phase. The changes in strength as the result of heat treatment are correlated with the equilibrium alloy contents of the phases present at the solution temperature.

Author(s):
Fopiano, Paul J. ; Hickey, Jr, Charles F.
Author Organization(s):
ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA
Descriptive Note:
Technical rept.
Pagination:
0018

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AMMRC-TR-68-13
Project Number(s):
1C014501B32A
Monitor Series:
AMMRC
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_6_Net Centric; JCA_1.3_Human Capital Management; JCA_1_Force Support; JCA_3.2_Engagement; JCA_3_Force Application; JCA_6.1.2_Wireless Transmission; JCA_6.4.1_Secure Information Exchange; JCA_1.3.2_Personnel Management; JCA_3.2.1_Kinetic Means; JCA_6.1_Information Transport
Modernization Areas:
Space
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*SOLUTION HEAT TREATMENT, *TITANIUM ALLOYS, AGE HARDENING, AGING(MATERIALS), ALUMINUM, DECOMPOSITION, ELECTRICAL RESISTANCE, ELECTRON MICROSCOPY, HARDNESS, MARTENSITE, MEASUREMENT, MOLYBDENUM, PHASE STUDIES, TRANSFORMATIONS, VANADIUM, X RAY DIFFRACTION
Field(s)/Group(s):
Properties of Metals and Alloys, Fabrication Metallurgy, Mechanics
Keyword(s):
ALPHA PHASE ALLOYS, BETA PHASE ALLOYS, TITANIUM ALLOY 6AL 2SN 6V, TITANIUM ALLOY 6AL 4V, TITANIUM ALLOY ALPHA PHASES, TITANIUM ALLOY 8AL 1MO 1V, TITANIUM ALLOY BETA PHASES
Report Date:
1968 Jun 01