Titanium Alloys: Thermal Treatment and Thermomechanical Processing
2014
Once the chemistry (composition) is set the mechanical properties of Titanium Alloys depend almost entirely on the size, shape, and distribution of two allotropic phases: the high-temperature b.c.c. s-phase and the low-temperature h.c.p. a-phase. Thermomechanical processing (TMP) – which is a combination of working (deformation) and thermal (heat) treatment – controls the microstructures and, in turn, the mechanical properties. For example, fracture-critical structures perform most efficiently when fabricated from materials processed to achieve a lenticular morphology, i.e., a high fracture toughness. In contrast Ductility is favored by a globular morphology.
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