Microstructure and Mechanical Property of the Directionally Solidified NiAl-Cr(Mo)-Hf/Ho Alloy

Ping Han; Yi Hui Qi; Juan Meng; Jian Ting Guo

doi:10.4028/www.scientific.net/AMR.652-654.1084

Paper Titles

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Effect of Heat Treatment on Microstructure and Properties of Ti-6.5Al-1.5Mo-2.5V-2Zr Titanium Alloy
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Effect of Si Content on Deformation Behavior of DC Cast Al-Si Alloys
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Microstructure and Mechanical Property of the Directionally Solidified NiAl-Cr(Mo)-Hf/Ho Alloy
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Research on Corrosion Rate Prediction of Aluminum Alloys in Typical Domestic Areas Based on BP Artificial Neural Network
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The Precipitation Behavior of γ' Phase in Superalloy FGH96 during Continuous Solution Cooling Conditions
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In Situ Study of Stress-Induced Martensitic Transformation in Ni₄₇Ti₄₄Nb₉ Shape-Memory Alloys
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Investigation of Porous NiAl Intermetallics Prepared by Self-Propagating High-Temperature Synthesis
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654Microstructure and Mechanical Property of the...

Microstructure and Mechanical Property of the Directionally Solidified NiAl-Cr(Mo)-Hf/Ho Alloy

Abstract:

The microstructure and mechanical property of directionally solidified NiAl-Cr(Mo)-Hf/Ho alloy were studied. The results indicate that the alloy is composed of NiAl matrix and Cr(Mo) phase, the dispersion of Hf is identical with the NiAl matrix, and at the cell boundary, the dispersion of Ho is disperse. As the pull speed increase from 8mm/min to 15mm/min, the size of eutectic cell decreases, the lamellar size descends, too. After the homogenization heat treatment at 1473K for 20h, the size of eutectic cell increases, and the second phase precipitates, the hardness of the alloy decreases.