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Factors influencing the titanium alloy properties

Nb-55%Ti-5%Zr (atomic), after a 100-hour aging treatment of Je is saturated. Due to changes in Tc and p-value associated with the component, when the Tc, and p value reached a saturation point, and microstructure of isothermal aging changes. Aging treatment of the previous organization known as fibrous histiocytoma, are out of the wood along the grain of the secondary direction extends the processing organization. Because the precipitation was along the border of fibrous tissue deposition of priority, so that increased with the improvement of aging temperature and time, precipitation increase in particle size and number of packages. For example, the limitation of l00 hours, granular precipitates sizes up to 100 nm. If the limitation more than l00 hours, precipitates to grow large. Thus, after aging of alloy, Jc and precipitates changes in size have a close relationship.

If the aging temperatures up to 500 degrees Celsius, along the border of fibrous tissue size effect of precipitation and separation of hundred nm. Low temperature aging, precipitates an increase in the number, but the size is very small, only dozens of nanometers.

At 3.5015 million range when aging has obvious effects on the mechanical properties of the alloy are also as you can see, different content of titanium alloys the tensile strength at any time regardless of changes in temperature. When in low temperature limitation due to precipitate particles small and resistant high strength. 350 ¡æ aging, increased tensile strength value is more significant. Analysis of limitation in such conditions, may are w phase precipitation. At 500 prescription, due to the Elimination of work-hardening, tensile strength decreases.