Processes for producing a nickel-titanium alloy are disclosed. The processes are characterized by the production of nickel-titanium alloy articles having improved microstructure. A pre-alloyed nickel-titanium alloy is melted and atomized to form molten nickel-titanium alloy particles. The molten nic
Processes for producing a nickel-titanium alloy are disclosed. The processes are characterized by the production of nickel-titanium alloy articles having improved microstructure. A pre-alloyed nickel-titanium alloy is melted and atomized to form molten nickel-titanium alloy particles. The molten nickel-titanium alloy particles are cooled to form nickel-titanium alloy powder. The nickel-titanium alloy powder is consolidated to form a fully-densified nickel-titanium alloy preform that is hot worked to form a nickel-titanium alloy article. Any second phases present in the nickel-titanium alloy article have a mean size of less than 10 micrometers measured according to ASTM E1245-03 (2008) or an equivalent method.
대표청구항▼
1. A nickel-titanium alloy article comprising: 50.0 to 60.0 weight percent nickel based on the total weight of the article; andbalance titanium and residual elements;wherein the residual elements comprise greater than 300 ppm oxygen; andwherein oxide inclusions and carbide inclusions present in the
1. A nickel-titanium alloy article comprising: 50.0 to 60.0 weight percent nickel based on the total weight of the article; andbalance titanium and residual elements;wherein the residual elements comprise greater than 300 ppm oxygen; andwherein oxide inclusions and carbide inclusions present in the nickel-titanium alloy article have a mean size of less than 7.5 micrometers measured according to ASTM E1245-03 (2008) or an equivalent method. 2. The nickel-titanium alloy article of claim 1, wherein the residual elements comprise greater than 350 ppm oxygen. 3. The nickel-titanium alloy article of claim 1, wherein the residual elements comprise greater than 100 ppm carbon. 4. The nickel-titanium alloy article of claim 1, wherein oxide inclusions and carbide inclusions present in the nickel-titanium alloy article have a mean size of less than 3 micrometers measured according to ASTM E1245-03 (2008) or an equivalent method. 5. The nickel-titanium alloy article of claim 1, wherein oxide inclusions and carbide inclusions present in the nickel-titanium alloy article have a mean size of less than 5 micrometers measured according to ASTM E1245-03 (2008) or an equivalent method. 6. The nickel-titanium alloy article of claim 1, wherein oxide inclusions and carbide inclusions present in the nickel-titanium alloy article have a mean size of less than 2.5 micrometers measured according to ASTM E1245-03 (2008) or an equivalent method. 7. The nickel-titanium alloy article of claim 1, wherein oxide inclusions and carbide inclusions present in the nickel-titanium alloy article have a mean size of less than 1.5 micrometers measured according to ASTM E1245-03 (2008) or an equivalent method. 8. The nickel-titanium alloy article of claim 1, wherein second phases present in the nickel-titanium alloy article have an area fraction of less than 2.5 percent measured according to ASTM E1245-03 (2008) or an equivalent method. 9. The nickel-titanium alloy article of claim 1, wherein second phases present in the nickel-titanium alloy article have an area fraction of less than 2.0 percent measured according to ASTM E1245-03 (2008) or an equivalent method. 10. The nickel-titanium alloy article of claim 1, wherein second phases present in the nickel-titanium alloy article have an area fraction of less than 1.5 percent measured according to ASTM E1245-03 (2008) or an equivalent method. 11. The nickel-titanium alloy article of claim 1, wherein oxide inclusions and carbide inclusions present in the nickel-titanium alloy article have a mean size of less than 2.5 micrometers, and an area fraction of less than 2.5 percent, measured according to ASTM E1245-03 (2008) or an equivalent method. 12. The nickel-titanium alloy article of claim 1, wherein oxide inclusions and carbide inclusions present in the nickel-titanium alloy article have a mean size of less than 2 micrometers, and an area fraction of less than 2.0 percent, measured according to ASTM E1245-03 (2008) or an equivalent method. 13. The nickel-titanium alloy article of claim 1, wherein the article is selected from the group consisting of a billet, bar, rod, tube, slab, plate, sheet, foil, or wire. 14. The nickel-titanium alloy article of claim 1, wherein the alloy comprises 54.5 weight percent to 57.0 weight percent nickel. 15. The nickel-titanium alloy article of claim 1, wherein the alloy comprises 49.0 atomic percent to 55.0 atomic percent nickel. 16. The nickel-titanium alloy article of claim 1, wherein the alloy further comprises at least one additional alloying element selected from the group consisting of iron, niobium, and hafnium. 17. The nickel-titanium alloy article of claim 1, wherein non-metallic Ti4Ni2Ox oxide second phases present in the nickel-titanium alloy article have a mean size of less than 7.5 micrometers, and an area fraction of less than 2.5 percent, measured according to ASTM E1245-03 (2008) or an equivalent method. 18. The nickel-titanium alloy article of claim 1, wherein non-metallic Ti4Ni2Ox oxide second phases present in the nickel-titanium alloy article have a mean size of less than 2.5 micrometers, and an area fraction of less than 2.5 percent, measured according to ASTM E1245-03 (2008) or an equivalent method. 19. A process for producing the nickel-titanium alloy article of claim 1, the process comprising: melting a pre-alloyed nickel-titanium alloy;atomizing the molten nickel-titanium alloy to form molten nickel-titanium alloy particles;cooling the molten nickel-titanium alloy particles to form a nickel-titanium alloy powder;hot isostatic pressing at least a portion of the nickel-titanium alloy powder to form a fully-densified nickel-titanium alloy preform;hot working the nickel-titanium alloy preform; andcold working the nickel-titanium alloy after the hot working to form a nickel-titanium alloy article. 20. The process of claim 19, wherein the hot working is performed on the nickel-titanium alloy preform at an initial temperature in the range of 600° C. to 900° C. 21. The process of claim 19, further comprising annealing the nickel-titanium alloy article after the cold working. 22. The process of claim 21, wherein the annealing is performed at a temperature in the range of 600° C. to 900° C. 23. The process of claim 19, wherein the nickel-titanium alloy comprises 50.0 to 60.0 weight percent nickel based on the total weight of the alloy, and balance titanium and residual elements. 24. The process of claim 19, wherein the nickel-titanium alloy comprises 49.0 atomic percent to 55.0 atomic percent nickel, and balance titanium and residual elements. 25. The process of claim 19, wherein the nickel-titanium alloy further comprises at least one additional alloying element selected from the group consisting of iron, niobium, and hafnium. 26. A nickel-titanium alloy article comprising: 50.0 to 60.0 weight percent nickel based on the total weight of the article; andbalance titanium and residual elements;wherein the residual elements comprise greater than 300 ppm oxygen; andwherein oxide inclusions and carbide inclusions present in the nickel-titanium alloy article have a mean size of less than 2.5 micrometers measured according to ASTM E1245-03 (2008) or an equivalent method,wherein oxide inclusions and carbide inclusions present in the nickel-titanium alloy article have an area fraction of less than 2.5 percent measured according to ASTM E1245-03 (2008) or an equivalent method, andwherein the article is selected from the group consisting of a billet, bar, rod, or wire. 27. The nickel-titanium alloy article of claim 26, wherein the alloy comprises 49.0 atomic percent to 55.0 atomic percent nickel. 28. The nickel-titanium alloy article of claim 26, wherein the alloy further comprises at least one additional alloying element selected from the group consisting of iron, niobium, and hafnium.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (31)
Forbes Jones, Robin M.; Kennedy, Richard L., Apparatus and method for clean, rapidly solidified alloys.
Flomenblit Josef (15/12 Akiva St. Holon 58824 ILX) Budigina Nathaly (15/12 Akiva St. Holon 58824 ILX), Manufacture of a two-way shape memory alloy and device.
Sawyer Thomas F. (Stillwater NY) Benz Mark G. (Burnt Hills NY) Carter ; Jr. William T. (Ballston Lake NY) Zabala Robert J. (Schenectady NY), Method and apparatus for flow control in electroslag refining process.
Donachie Stephen J. (New Hartford NY) Fesko James W. (Clinton NY) Furgal James J. (Clinton NY) Sczerzenie Francis E. (Clinton NY), Method for producing an alloy product of improved ductility from metal powder.
Goldstein David (Adelphia MD) Jones Richard E. (Silver Spring MD) Sery Robert S. (Silver Spring MD), Method of modifying the transition temperature range of TiNi base shape memory alloys.
Simpson John A. (Mountain View CA) Melton Keith (Cupertino CA) Duerig Tom (Fremont CA), Method of processing a nickel/titanium-based shape memory alloy and article produced therefrom.
Forbes Jones, Robin M.; Kennedy, Richard L.; Conrad, Helmut Gerhard; Szylowiec, Ted; Conrad, Wayne; Phillips, Richard Stanley; Phillips, Andrew Richard Henry, Methods and apparatus for spray forming, atomization and heat transfer.
Forbes Jones,Robin M.; Kennedy,Richard L.; Conrad,Helmut Gerhard; Szylowiec,Ted; Conrad,Wayne; Phillips,Richard Stanley; Phillips,Andrew Richard Henry, Methods and apparatus for spray forming, atomization and heat transfer.
Honma Toshio (Sendai JPX) Nishida Minoru (Sendai JPX) Yamauchi Kiyoshi (Sendai JPX), Ti-Ni alloy articles having a property of reversible shape memory and a method of making the same.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.