Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 34, Issue 1, Pages 147-158Publisher
MINERALS METALS MATERIALS SOC
DOI: 10.1007/s11661-003-0216-8
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Precipitation and recrystallization behavior during the continuous heat treatment of three beta-titanium alloys with various molydenum equivalents (VT22, Ti-15-3, and TIMETAL-LCB) was established. Following solution treatment, the materials were cold deformed to various reductions and then heated at rates between 0.17 and 50 K s(-1) to peak temperatures below and above the beta-transus temperature. Precipitation below the transus was most rapid for the alloy with the least amount of beta stabilizing elements (VT22) and next fastest for the most-highly-alloyed material (TIMETAL-LCB), an effect ascribed to its large iron content. The reduction level was found to have a very strong influence on the uniformity of recrystallization and the recrystallized grain size. Because of the competition between precipitation and the temperature dependence of recrystallization nucleation and growth, the heating-rate dependence of the recrystallization temperature for the beta-titanium alloys was weak.
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