利用电子显微镜对一种时效后的Mg-Y-Nd合金中析出相(β相)进行了研究.给出了分别沿β相[0001]与[11(-2)0]晶带轴方向观察时的形貌特征.分析表明,β相在基体中沿3个不同的〈11(-2)0〉方向生长,且β相沿〈0001〉α和〈11(-2)0〉α方向生长的速度要远大于沿〈1(-1)00〉方向的生长速度.通过对β相与基体之间不同的错配度分析说明了β相沿〈0001〉α不同方向生长速度的不同原因.
参考文献
| [1] | Polmear I J .[J].Materials Science and Technology,1994,10(01) |
| [2] | Luo A;Pekguleryuz M O .Cast magnesium alloys for elevated temperature applications[J].Journal of Materials Science,1994,29:5259. |
| [3] | Apps P J;Lorimer G W;Karirnzadeh H;Kainer K U.Precipitation processes in magnesium-heavy rare earth alloys during ageing at 300℃,magnesium alloys and their applications[M].New York,2000:53. |
| [4] | Lorimer G W.[M].London,1986:47. |
| [5] | Ahmed M;Lorimer G W;Lyon P.Magnesium Alloys and their Application[A].Verlag,1992:251. |
| [6] | Unsworth W;Kingm J F .New high performance casting alloy developed[J].METALLURGIA,1986,53:199. |
| [7] | Vostry P;Stulikova I;Vostry B X et al.A study of the decomposition of supersaturated Mg-Y-Nd,Mg-Y,Mg-Nd alloys[J].Z METALLKDE,1988,79:340. |
| [8] | Nie J F;Muddle B C .Precipitation in magnesium alloy WE54 during isothermal ageing at 250℃[J].Scripta Materialia,1999,40:1089. |
| [9] | Nie J F;Muddle B C .Characterization of strengthening precipitate phases in a Mg-Y-Nd alloy[J].Acta Materialia,2000,48:1691. |
| [10] | Ifeanyi Anthony Anyanwu;Shigeharu Kamado;Yo Kojima .Creep Properties of Mg-Gd-Y-Zr Alloys[J].Materials transactions,2001(7):1212-1218. |
| [11] | Howe J M.Interfaces in Marerials[M].New York:A Wiley-Interscience Publication,1997 |
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