Ti-V-A1 based superelasticity alloy and process for preparation thereof
OwnerMikio Takeuchi, Hiroyuki Tada +1inventors
InventorsMikio Takeuchi, Hiroyuki Tada, Kanryu Inoue
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Abstract
A Ti—V—Al based superelastic alloy wherein the proportions of Ti, Al and V, based on the total weight of the three components, fall within the range defined by the lines joining the following points of A, B, C and D shown in the ternary composition diagram of accompanying FIG. 1: A: 79.8% Ti, 17.5% V, 2.7% Al, B: 76.8% Ti, 20.5% V, 2.7% Al, C: 73.8% Ti, 20.5% V, 5.7% Al, D: 76.8% Ti, 17.5% V, 5.7% Al.
Claims5
A Ti—V—Al based superelastic alloy wherein the proportions of Ti, Al and V, based on the total weight of the three components, fall within the range defined by the lines joining the following points of A, B, C and D shown in the ternary composition diagram of accompanying FIG. 1:
- A:
- 79.8% Ti, 17.5% V, 2.7% Al,
- B:
- 76.8% Ti, 20.5% V, 2.7% Al,
- C:
- 73.8% Ti, 20.5% V, 5.7% Al,
- D:
- 76.8% Ti, 17.5% V, 5.7% Al.
A process for preparing a Ti—V—Al based superelastic alloy, which comprises forming an alloy wherein the proportions of Ti, Al and V, based on the total weight of the three components, fall within the range defined by the lines joining the following points of A, B, C and D shown in the ternary composition diagram of accompanying FIG. 1, followed by heat treatment at 800° C. to 1200° C. and quenching:
- A:
- 79.8% Ti, 17.5% V, 2.7% Al,
- B:
- 76.8% Ti, 20.5% V, 2.7% Al,
- C:
- 73.8% Ti, 20.5% V, 5.7% Al,
- D:
- 76.8% Ti, 17.5% V, 5.7% Al.
A process for preparing a Ti—V—Al based superelastic alloy, which comprises forming an alloy wherein the proportions of Ti, Al and V, based on the total weight of the three components, fall within the range defined by the lines joining the following points of A, B, C and D shown in the ternary composition diagram of accompanying FIG. 1, followed by heat treatment at 800° C. to 1200° C. and quenching and then aging the alloy at temperatures no higher than 200° C.:
- A:
- 79.8% Ti, 17.5% V, 2.7% Al,
- B:
- 76.8% Ti, 20.5% V, 2.7% Al,
- C:
- 73.8% Ti, 20.5% V, 5.7% Al,
- D:
- 76.8% Ti, 17.5% V, 5.7% Al.
Dependencies are inferred from the claim text.