在静磁场下进行高温合金DD483的定向凝固实验,研究了不同磁场强度对单晶镍基高温合金DD483凝固组织枝晶形貌、合金元素偏析系数、析出相和蠕变性能的影响.结果表明:纵向静磁场的施加使高温合金DD483单晶生长性受到破坏,强的磁场使得枝晶定向生长形态受到破坏,形成“雀斑组织”,对一次枝晶间距影响不大.施加磁场使得该单晶合金中合金元素的偏析降低；也使单晶高温合金DD483凝固态组织中γ’析出尺寸降低、碳化物和共晶组织尺寸和含量显著减小.同时磁场对该合金的单晶性和枝晶的定向生长行为的破坏使得合金的蠕变性能降低.
参考文献
| [1] | 任忠鸣.强磁场下金属凝固研究进展[J].中国材料进展,2010(06):40-49. |
| [2] | Utech H P;Flemings M C.Elimination of solute banding in indium antimonide crystals by growth in a magnetic field[J].Applied Physics,1966(37):2021-2024. |
| [3] | Chedzey H A;Hurle D T J.Avoidance of growth-striate in semiconductor and metal crystals grown by zone-melting techniques[J].Nature,1966(21):933-934. |
| [4] | Moreau R;Laskar O;Tanaka M .Thermoelectric magnetohydrodynamic effects on solidification of metallic alloys in the dendritic regime[J].Materials Science and Engineering,1993,A173:93-100. |
| [5] | P.Lehmann;R.Moreau;D.Camel .Modification of interdendritic convection in directional solidification by a uniform magnetic field[J].Acta materialia,1998(11):4067-4079. |
| [6] | Alboussiere T;Moreau R;Camel D .Influence of a magnetic field on the solidification of metallic alloys[J].Academic Science,1991,313(07):749-755. |
| [7] | A Dramatic Increase In Dendrite Number For Directionally Solidified Superalloy Dz417g With A Strong Static Magnetic Field[J].Materials Letters,2009(3/4):382-385. |
| [8] | 李旭,任忠鸣,任维丽,李喜,钟云波,邓康,董建文,陈超.纵向磁场作用下DZ417G高温合金的枝晶生长行为[J].中国有色金属学报,2010(10):1913-1921. |
| [9] | 玄伟东,任忠鸣,李传军,任维丽,陈超,于湛.纵向磁场对不同尺寸定向凝固高温合金DZ417G组织的影响[J].金属学报,2012(05):629-635. |
| [10] | 董建文,任忠鸣,任维丽,李喜,李旭.横向磁场对镍基高温合金定向凝固组织的影响[J].金属学报,2010(01):71-76. |
| [11] | 孙延辉,任忠鸣,李喜,王洪亮,王俊,邓康.强磁场对Al-4.5%Cu合金枝晶生长行为影响的初步研究[J].自然科学进展,2005(09):1148-1152. |
| [12] | Karunaratne MSA;Cox DC;Carter P.Modelling of the microsegregation in CMSX-4 superalloy and its homogenisation during heat treatment[A].TMS:Warrendale:PA,2000:263-272. |
| [13] | Kearsey R M;Beddoes J C;Jaansal U K M.The effects of Re,W and Ru on microsegregation behavior in single crystal superalloy systems[J].Metals and Materials Society,2004:801-810. |
| [14] | 李茂,任维丽,任忠鸣,李喜,钟云波,邓康.纵向强磁场对Al-0.85％Cu合金定向凝固界面稳定性和形态的影响[J].中国有色金属学报,2011(06):1292-1298. |
| [15] | Xi Li;Yves Fautrelle;Zhongming Ren .Influence of thermoelectric effects on the solid–liquid interface shape and cellular morphology in the mushy zone during the directional solidification of Al–Cu alloys under a magnetic field[J].Acta materialia,2007(11):3803-3813. |
| [16] | 丰建武,樊亚夫,李茂,任维丽,钟云波,任忠鸣.纵向弱磁场对Al-0.85wt％Cu合金液固平界面稳定性的影响[J].上海金属,2012(06):1-6,22. |
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%