Thermomechanical method of forming high-strength beta-titanium alloys
Abstract
Abstract BETA-TITANIUM ALLOYS CONTAINING A RELATIVELY LARGE FRACTION OF A BETA-PHASE STABILIZER ARE THERMOMECHANICALLY TREATED TO PROVIDE INCREASED STRENGTH LEVELS OF GREATER THAN 220 K.S.I. WITH ONLY A MINIMUM LOSS OF DUCTILITY, THE TREATMENTS INVOLVING HEATING THE STOCK A POINT NEAR ITS BETATRANSUS, RAPID COOLING, COLD ROLLING AND AGING, THE LAST STEP INCLUDING EITHER A SINGLE FINAL AGING AT A TEMPERATURE ING THE ALPHA-FORMING TEMPERATURE RANGE OR A MULTI-STEP AGING PROCESS WHICH INCLUDES PRE-AGING IN THE OMEGA-FORMING RANGE PRIOR TO THE FINAL AGING. COLD ROLLING PLUS FINAL AGING IMPROVES STRENGTH AND DUCTILITY, WHILE COLD-ROLLING PLUS MULTI-STEP AGING IS VERY EFFECTIVE FROM A TRANSFORMATION TIME VIEWPOINT, REDUCING THE AGING TIME NEEDED TO OBTAINE THE OPTIMUM STRENGTH LEVELS BY FACTORS OF 10-100 OVER SINGLE AGING.
Inventors
- 👤 L Rosales
- 👤 A Sommer
- 👤 K Ono
Bibliographic Details
Claims Analysis
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