Microstructure characteristics and mechanical properties of NiAl/Cr(Hf, Ho) in situ composite

被引：1

作者：

Sheng, L.Y. ^{[1
]}

机构：

[1] Shenzhen Institute, Peking University, Shenzhen

来源：

Materials Research Innovations | 2015年 / 19卷

关键词：

Mechanical properties; Microstructure; NiAl/Cr in situ composite; Precipitation; Transmission electron microscopy;

D O I：

10.1179/1432891715Z.0000000001938

中图分类号：

学科分类号：

摘要：

Minor hafnium and holmium were added in the NiAl/Cr in situ composite and their effects on microstructure evolution and mechanical properties were studied. The results reveal that minor holmium can refine the eutectic lamella inside eutectic cell and precipitating phase in intercellular zone. Furthermore, holmium addition causes the precipitation of Ni2Al3Ho and Ni17Ho2phases, which have the orientation relationships of [120]Ni2Al3Ho//[111]NiAl, (002)Ni2Al3Ho//(11 0)NiAl, [12 3]al17Ho2//[1 24]Ni2Al3Hoand (111)al17Ho2//(210)Ni2Al3Ho. Additionally, with the holmium addition, the amount of Heusler phase increases and the precipitates in eutectic lamella become coarsening. Mechanical properties exhibit that appropriate addition of hafnium and holmium can increase the strength and hardness of the composite. © W. S. Maney & Son Ltd 2015.

引用

页码：S9111 / S9115

页数：4

共 24 条

[1]

Miracle D.B., Overview No. 104 the physical and mechanical properties of NiAl, Acta Metal. Mater., 41, pp. 649-684, (1993)

[2]

Sheng L.Y., Zhang W., Guo J.T., Yang F., Liang Y.C., Ye H.Q., Effect of Au addition on the microstructure and mechanical properties of NiAl intermetallic compound, Intermetallics, 18, pp. 740-744, (2010)

[3]

Ye H.Q., Recent developments in high temperature intermetallics research in China, Intermetallics, 8, pp. 503-509, (2000)

[4]

Sheng L.Y., Xie Y., Xi T.F., Guo J.T., Zheng Y.F., Ye H.Q., Microstructure characteristics and compressive properties of NiAlbased multiphase alloy during heat treatments, Mater. Sci. Eng. A, 528, pp. 8324-8331, (2011)

[5]

Sheng L.Y., Zhang W., Guo J.T., Zhou L.Z., Ye H.Q., Microstructure evolution and mechanical properties' improvement of NiAl-Cr (Mo)-Hf eutectic alloy during suction casting and subsequent HIP treatment, Intermetallics, 17, pp. 1115-1119, (2009)

[6]

Bei H., George E.P., Microstructures and mechanical properties of a directionally solidified NiAl-Mo eutectic alloy, Acta Mater, 53, pp. 69-77, (2005)

[7]

Sheng L.Y., Guo J.T., Zhou L.Z., Ye H.Q., Microstructure and compressive properties of NiAl-Cr (Mo)-Dy near eutectic alloy prepared by suction casting, Mater. Sci. Technol, 26, pp. 164-168, (2010)

[8]

Johnson D.R., Chen X.F., Oliver B.F., Noebe R.D., Whitterberger J.D., Processing and mechanical properties of in situ composites from the NiAl-Cr and the NiAl-(Cr, Mo) eutectic systems, Intermetallics, 3, pp. 99-113, (1995)

[9]

Sheng L.Y., Nan L., Zhang W., Guo J.T., Ye H.Q., Microstructure and mechanical properties determined in compressive tests of quasi-rapidly solidified NiAl-Cr (Mo)-Hf eutectic alloy after hot isostatic pressure and high temperature treatments, J. Mater. Eng. Perform., 19, pp. 732-736, (2010)

[10]

Sheng L.Y., Yang F., Guo J.T., Xi T.F., Anomalous yield and intermediate temperature brittleness behaviors of directionally solidified nickel-based superalloy, Trans. Nonferrous Met. Soc. China, 24, pp. 673-681, (2014)

← 1 2 3 →