Abstract
In this study a new approach to optimizing the mechanical properties of high-temperature titanium alloys was developed. It is based on using rapid heating of equiaxed structures into the β-field to achieve a fine β grain size (less than or equal to 100 μm), transforming on subsequent cooling into a fully lamellar structure. This fine β grain size is an order of magnitude smaller than the grain sizes achieved by conventional furnace β-treatment. Structures and mechanical properties (tensile, fatigue and creep) of high temperature alloys after rapid and conventional furnace heat treatments were compared. The results are discussed in terms of structure-property relationships.
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