The hardness variation of two kinds of alloys with 36 wt pct W content and 7/3, 9/1 Ni-to-Fe ratios during strain aging at 800℃ was studied. The microstructures of the aged alloys were analyzed by X-ray diffraction and TEM. The results show that the strain aging hardness of W-Ni-Fe ternary alloy with 7/3 Ni-to-Fe ratio decreases monotonically with the increase of aging time. Under the same conditions, the hardness of 9/1 Ni-to-Fe ratio alloy decreases in the initial aging stage, but then increases as aging process goes on. X ray diffraction and TEM analysis show that there is not any precipitation depositing from the alloy with 7/3 Ni-to-Fe ratio during aging. The monotonic decrease in hardness of this alloy during aging process results from the recovery, recrystallization and solid solubility declining. In the alloy of 9/1 Ni-to-Fe ratio, the fine β phase precipitates dispersively during aging which hardens the alloy. The two different kinds of mechanisms (the softening one and the hardening one) decide the hardness variation of the alloy with 9/1 Ni-to-Fe ratio mentioned above.
参考文献
| [1] | J C McLennan;C J Smithells .[J].Journal of sci Instrme,1935,12:159. |
| [2] | F R Winslow.[M].U.S.Atomic Energy Commission, Pub.Y,1971 |
| [3] | Steven G Caldwell.[A].Virginia,1992:89. |
| [4] | James R S Spencer.[A].Virginia,1992:111. |
| [5] | Steven G Caldwell .[J].Prog Powder Metall,1987,43:123. |
| [6] | G V Rnynor;V G Rivlin .[J].International Metals Reviews,1983,28:122. |
| [7] | James R S Spencer.[A].Virginia,1992:111. |
| [8] | Ronghua LI;Jihua HUANG .[J].Journal of University of Science and Technology Beijing,2002,24:38. |
| [9] | Robert J Dowding;Kenneth J Tauer .[Z].U S Army Materials Technology Lab,1989. |
| [10] | V Srikanth;G Supadhyaya .[J].Journal of Materials Science Letters,1988,7(03):195. |
| [11] | Jihua HUANG;Lichun ZHANG .[J].Journal of University of Science and Technology Beijing,2000,22:149. |
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