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材料工程  2012 

Ru对单晶高温合金拉伸性能的影响

, PP. 76-79

Keywords: Ru,单晶高温合金,屈服强度,抗拉强度,断裂特征,位错,纯剪切

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Abstract:

为了研究Ru在含Re单晶高温合金的作用,利用扫描电镜和透射电镜以及电子拉伸实验机对不同Ru含量的三种单晶高温合金的拉伸性能和变形组织及形貌进行观察和分析,研究结果表明三种合金随着Ru含量的增加,合金热处理态γ′相尺寸逐渐减小,立方度明显增加。900℃下的拉伸实验表明随着Ru含量的增加,合金的屈服强度和抗拉强度都略有增加。900℃下三种合金的断裂方式均为纯剪切型断裂。变形机制为位错切割γ′位错对夹着反相畴界模式。因此,Ru的加入略微增加了合金的强度,但没有改变合金的变形机制和断裂特征。

References

[1]  陈荣章.单晶高温合金发展现状[J]. 材料工程, 1995, (8): 3-12.
[2]  KOIZUMI Y, KOBAYASHI T, YOKOKAWA T, et al. Development of next generation Ni-base single crystal superalloys[A]. GREEN K A, POLLOCK T M, HARADA H. Superalloys 2004[C]. Warrendale, PA:TMS,2004.35-43.
[3]  ZHANG J X, MURAKUMO T, KOIZUMI Y, et al. Interfacial dislocation networks strengthening a fourth-generation single-crystal TMS-138 superalloy[J]. Metall Mater Trans A, 2002, 33(12): 3741-3746.
[4]  YEH A C, SATO A, KOBAYASHI T, et al. On the creep and phase stability of advanced Ni-base single crystal superalloys[J]. Mater Sci Eng A, 2008, 490(1-2): 445-451.
[5]  WANG C, WANG C Y. Density functional theory study of Ni/Ni3Al interface alloying with Re and Ru[J]. Surface Science, 2008, 602(14): 2604-2609.
[6]  赵明汉,张继,冯滌. 高温合金断口分析[M]. 北京: 冶金工业出版社, 2006.
[7]  YOKOKAWA T, OSAWA M, NISHIDA K, et al. Partitioning behavior of platinum group metals on the γ and γ′ phases of Ni-base superalloys at high temperatures[J]. Scripta Mater,2003,49(10): 1041-1046.
[8]  HOBBS R A, ZHANG L, RAE C M F, et al. The effect of ruthenium on the intermediate to high temperature creep response of high refractory content single crystal nickel-base superalloys[J]. Mater Sci Eng A, 2008, 489(1-2): 65-76.
[9]  CARROLL L J, FENG Q, MANSFIELD J F, et al. High refractory, low misfit Ru-containing single crystal superalloys[J]. Metall Mater Trans A, 2006, 37(10): 2927-2938.
[10]  CARROLL L J, FENG Q, MANDSFIELD J F, et al. Elemental partitioning in Ru-containing nickel-base single crystal superalloys[J]. Mater Sci Eng A, 2007, 457(1-2): 292-299.

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