BULK NICKEL-BASED CHROMIUM AND PHOSPHORUS BEARING METALLIC GLASSES WITH HIGH TOUGHNESS
First Claim
1. An alloy, the alloy comprising:
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Ni(100-a-b-c-d)CraNbbPcBd wherein an atomic percent of chromium (Cr) a ranges from 3 to 13, an atomic percent of niobium (Nb) b is determined by x−
y*a, wherein x ranges from 3.8 to 4.2 and y ranges from 0.11 to 0.14, an atomic percent of phosphorus (P) c ranges from 16.25 to 17, an atomic percent of boron (B) d ranges from 2.75 to 3.5, and the balance is nickel (Ni), and wherein the alloy is capable of forming a metallic glass object having a lateral dimension of at least 6 mm, wherein the metallic glass has a stress intensity factor at crack initiation when measured on a 3 mm diameter rod containing a notch with length between 1 and 2 mm and root radius between 0.1 and 0.15 mm, the stress intensity factor being at least 70 MPa m1/2.
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Accused Products
Abstract
A Ni-based bulk metallic glass forming alloy is provided. The alloy includes Ni(100-a-b-c-d)CraNbbPcBd, where an atomic percent of chromium (Cr) a ranges from 3 to 13, an atomic percent of niobium (Nb) b is determined by x−y*a, where x ranges from 3.8 to 4.2 and y ranges from 0.11 to 0.14, an atomic percent of phosphorus (P) c ranges from 16.25 to 17, an atomic percent of boron (B) d ranges from 2.75 to 3.5, and the balance is nickel (Ni), and where the alloy is capable of forming a metallic glass object having a lateral dimension of at least 6 mm, where the metallic glass has a stress intensity factor at crack initiation when measured on a 3 mm diameter rod containing a notch with length between 1 and 2 mm and root radius between 0.1 and 0.15 mm, the stress intensity factor being at least 70 MPa m1/2.
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Citations
20 Claims
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1. An alloy, the alloy comprising:
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Ni(100-a-b-c-d)CraNbbPcBdwherein an atomic percent of chromium (Cr) a ranges from 3 to 13, an atomic percent of niobium (Nb) b is determined by x−
y*a, wherein x ranges from 3.8 to 4.2 and y ranges from 0.11 to 0.14, an atomic percent of phosphorus (P) c ranges from 16.25 to 17, an atomic percent of boron (B) d ranges from 2.75 to 3.5, and the balance is nickel (Ni), and wherein the alloy is capable of forming a metallic glass object having a lateral dimension of at least 6 mm, wherein the metallic glass has a stress intensity factor at crack initiation when measured on a 3 mm diameter rod containing a notch with length between 1 and 2 mm and root radius between 0.1 and 0.15 mm, the stress intensity factor being at least 70 MPa m1/2.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An alloy comprising compositions selected from a group consisting of Ni73.375Cr3.5Nb3.625P16.5B3, Ni72.5Cr4.5Nb3.5P16.5B3, Ni71.5Cr5.64Nb3.36P16.5B3, Ni71.4Cr5.64Nb3.46P16.5B3, Ni71.4Cr5.52Nb3.38P16.67B3.03, Ni71.4Cr5.52Nb3.38P16.17B3.03Si0.5, Ni70.5Cr6.78Nb3.22P16.5B3, Ni68.5Cr9Nb3P16.5B3, Ni67.25Cr10.5Nb2.75P16.5B3, and Ni65.5Cr12.5Nb2.5P16.5B3.
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13. A method for processing an alloy to form a metallic glass, the method comprising:
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melting an alloy comprising at least Ni, Cr, Nb, P, and B with a formula Ni(100-a-b-c-d)CraNbbPcBd wherein an atomic percent of chromium (Cr) a ranges from 3 to 13, an atomic percent of niobium (Nb) b is determined by x−
y*a, wherein x ranges from 3.8 to 4.2 and y ranges from 0.11 to 0.14, an atomic percent of phosphorus (P) c ranges from 16.25 to 17, an atomic percent of boron (B) d ranges from 2.75 to 3.5, and the balance is nickel (Ni), into a molten state; andquenching the molten alloy at a cooling rate sufficiently rapid to prevent crystallization of the alloy to form the metallic glass, wherein the metallic glass has a stress intensity factor at crack initiation when measured on a 3 mm diameter rod containing a notch with length ranging from 1 to 2 mm and root radius ranging from 0.1 to 0.15 mm, the stress intensity factor being at least 70 MPa m1/2. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification