Nickel alloy composition with boron and nitrogen

1. An alloy composition comprising, by weight:

20% to 23% of Cr;

8% to 10% of Mo;

3.15% to 4.15% of Nb+Ta;

0.25% to 1.5% of B;

0.6% to 1.75% of N; and

a balance of Ni.

2. The alloy composition as recited in claim 1 , wherein the B is 0.5% to 1.2%.

3. The alloy composition as recited in claim 1 , where the N is 0.7% to 1.6%.

4. The alloy composition as recited in claim 1 , wherein the B is 0.5% to 1.2% and the N is 0.7% to 1.6%.

5. The alloy composition as recited in claim 1 , wherein the B is 0.4% to 0.7%.

6. The alloy composition as recited in claim 1 , wherein the N is 0.6% to 0.9%.

7. The alloy composition as recited in claim 1 , wherein the B is 1.1% to 1.3%.

8. The alloy composition as recited in claim 1 , wherein the N is 1.4% to 1.7%.

9. An article comprising:

an alloy of the following composition, by weight:

20% to 23% of Cr;

8% to 10% of Mo;

3.15% to 4.15% of Nb+Ta;

0.25% to 1.5% of B;

0.35% to 1.75% of N; and

a balance of Ni,

wherein the alloy has a microstructure that includes an acicular phase and a non-acicular phase.

10. The article as recited in claim 9 , wherein the acicular phase is Nb-rich.

11. The article as recited in claim 10 , wherein the acicular phase includes, by weight, at least 25% Nb.

12. The article as recited in claim 9 , wherein the non-acicular phase is Mo-rich.

13. The article as recited in claim 12 , wherein the non-acicular phase incudes, by weight, at least 50% Mo.

14. The article as recited in claim 9 , wherein the acicular phase is Nb-rich and includes, by weight, at least 25% Nb, the non-acicular phase is Mo-rich and incudes, by weight, at least 50% Mo, and microstructure has, by volume, 6% to 10% of the non-acicular phase and 0.5-4% of the acicular phase.

15. The article as recited in claim 9 , wherein the B is 0.5% to 1.2%.

16. The article as recited in claim 9 , where the N is 0.7% to 1.6%.