研究了DA 718 合金在680 ℃长期时效至3000 h γ″强化相的演变规律及微量元素磷的影响.结果表明;时效过程中盘状γ″相沿半径方向线性长大,沿厚度方向按抛物线规律长大;磷降低铌原子在基体中的扩散系数,因此阻碍γ″相粗化.同时研究了磷对DA718合金在680 ℃长期时效后力学性能的影响.结果表明,磷对合金室温硬度及拉伸性能影响不大,但能显著提高合金的抗蠕变性能.
参考文献
| [1] | Cao W D;Kennedy R L;Loria E A.Superalloys 718,625,706 and Various Derivatives[M].PA:TMS,1994:463. |
| [2] | McKamey C G;Carmichael C A et al.[J].Scripta Materialia,1998,38:485. |
| [3] | Song H W;Guo S R;Hu Z Q .[J].Scripta Materialia,1999,41:215. |
| [4] | Xie X S;Liu X B;Dong J X;Loria E A.Superalloys 718,625,706 and Various Derivatives[M].PA:TMS,1997:531. |
| [5] | Horton J A;McKamey C G;Miller M K;et al.Loria E A.Superalloys 718,625,706 and Various Derivatives[M].PA:TMS,1997:401. |
| [6] | Cao W D;Kennedy R L;Loria E A.Superalloys 718,625,706 and Various Derivatives[M].PA:TMS,1997:511. |
| [7] | Cao W D;Kennedy R L;Pollock T M.Superalloys 2000[M].Warrendale,PA:TMS,1996:101. |
| [8] | Cao W D;Kennedy R L;Loria E A.Superalloys 718,625,706 and Various Derivatives[M].PA:TMS,2001:455. |
| [9] | Chaturvedi M C;Han Y F .[J].Metal Science Journal,1983,17(03):145. |
| [10] | Slama C;Servant C;Cizeron G .[J].Journal of Materials Research,1997,12(09):2298. |
| [11] | Oblak J M;Paulonis D F;Duvall D S .[J].Metallurgical and Materials Transactions,1974,A5:143. |
| [12] | Axter S E;Polonis D H .[J].Materials Science and Engineering,1978,36:71. |
| [13] | Zener C .[J].Journal of Applied Physics,1949,20:950. |
| [14] | Miller M K .[J].MICRON,2001,32:757. |
| [15] | Campbell A N;Tsao S S;Turnbull D .[J].ACTA METALLURGICA,1987,35(10):2453. |
| [16] | Sijbrandij SJ.;Horton JA.;Cao WD.;Miller MK. .Atom probe analysis of nickel-based superalloy IN-718 with boron and phosphorus additions[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1):115-119. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%