Archive for November 2006

Titanium-Boron Alloys: Reaching New Strength Levels

Wednesday, November 29th, 2006

Dynamic Flowform Corp. has been collaborating with scientists and engineers at the US Air Force to flowform a new class of alloys.  The Air Force team has been developing and transitioning titanium-boron, an alloy that has high strength and stiffness as well as low density.  This new class of alloys could potentially fulfill the Air Force’s latest needs in aerospace structures, engine components, and spacecraft components.

Additions of 500-1000 parts per million of boron helps with the formation of equiaxed alpha, instead of lamellar alpha.  Specifically, these changes provide an order-of-magnitude reduction in cast grain size and eliminate rapid grain growth above the beta transus, while retaining strength, stiffness and fracture properties (ductility, toughness, fatigue).  These Ti-B alloys thus transcend the boundaries currently limiting manufacturability.  They enable a radical shift in the manufacturing process paths for the titanium industry including dramatic reduction or elimination of ingot breakdown enabled by an order-of-magnitude decrease in as-cast grain size, radical innovation in mill processing routines by relaxing current constraints imposed by the beta transus and new paradigms in secondary manufacturing such as flowforming, rolling, and super-plastic forming.

Ti-B material that has been flowformed and annealed achieved strength levels of 150 ksi Yield Strength, 160 ksi Ultimate Tensile Strength with 26% elongation.  Today, Dynamic Flowform is actively working with industry, the US Army, Navy and Air Force, offering them manufacturing cost reductions using these strong flowformed Ti-B alloys.

 

 

 

     
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