Titanium3.3
CANCELLED - Director of New Process Development
Tuesday, June 17, 2014: 9:30 AM
Tallahassee 3 (Gaylord Palms Resort )
Mr. M Miller
,
Loyola Marymount University, Los Angeles, CA
Mr. T Chavez
,
Loyola Marymount University, Los Angeles, CA
Mr. M Dearborn
,
Loyola Marymount University, Los Angeles, CA
Mr. T Tong
,
Loyola Marymount University, Los Angeles, CA
Mr. E Devore
,
Loyola Marymount University, Los Angeles, CA
Dr. Liang Zeng
,
Sargent Aerospace & defense, Torrance, CA
Prof. N Ula
,
Loyola Marymount University, Los Angeles, CA
Mr. Y Li
,
MANE Laboratories, Loyola Marymount University, Los Angeles, CA
Mr. J Foyos
,
Electrical Engineering Department, Los Angeles, CA
Prof. O.S. Said
,
Loyola Marymount University, Los Angeles, CA
Little is known about Ti-3Al-2.5V which is a possible replacement in applications utilizing Ti-6Al-4V due to its higher ductility. As a result, various heat treatments were performed on cylindrical tensile test bars in order to optimize the mechanical properties of Ti-3Al-2.5V. The objective of this project was to determine the differences in microstructure, texture, and toughness of heat treated Ti-3Al-2.5V samples. The yield strength, ultimate strength, percent elongation, percent reduction in area, and Rockwell hardness of heat treated Ti-3Al-2.5V were determined. Various heat treats were conducted. The samples were tensile tested on an Instron machine, and then selected fractured surfaces were evaluated by scanning electron microscopy. Pole figures (0002) were determined by x-ray diffraction.
There was no significant difference for annealing between 649C and 815C. There was an increase in the yield and ultimate strength at 926C and then a slight decrease at 954C. However, the numbers are still higher at 954C than 649C and 815C.The same trend happens for the quenched samples. However, quenching in water is always better then air cooling in terms of strength.
For the samples that were solution treated, water quenched, aged and then air cooled, at 871C solution treatment, the mechanical properties at 482 were higher as compared to 537C aging temperature. Same trend is observed in 926C solution treatment with the same aging temps mentioned. However, increasing the solution temperature from 871 to 926C was better for both aging temps. For aging at 510C, increasing the solution temp from 838 to 859 lowers strength but then when it was increased to 898 the strength increased again. At a solution treatment of 898 the strength decreased as the aging treatment temp increased from 470 to 510 to 549C.
