Influence of rhenium and tungsten on the microstructure and performance of GH4169 alloy through heat treatment

Author:

Wang Zhiyun1,Liu Bin1,Bai Peikang1,Zhao Zhanyong1,Wang Haili1,Wang Xiaojing2,Ding Tao3,Dong Mengyao4,Fan Jincheng5,Seok Ilwoo6,Guo Zhanhu7

Affiliation:

1. School of Materials Science and Engineering, North University of China, Taiyuan, China

2. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, China; Integrated Composites Laboratory, Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, USA

3. College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China

4. Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, China; Integrated Composites Laboratory, Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, USA

5. College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, China

6. Department of Mechanical Engineering, Arkansas State University, Jonesboro, AR, USA

7. Integrated Composites Laboratory, Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, USA

Abstract

The microstructure and performances of GH4169 nickel (Ni)-based alloy were studied after adding the elements rhenium (Re) and tungsten (W) and then conducting heat treatment. The alloy containing the element rhenium showed less δ phase after heat treatment. For both alloys containing the element tungsten and the GH4169 alloy without any element, the δ phase and rectangular carbide were all precipitated after the heat treatment. The creep rupture life of the alloy added with the element rhenium was higher than that of the alloy added with the element tungsten at a high temperature. When a mixture of 75% sodium sulfate (Na2SO4) and 25% sodium chloride (NaCl) was applied at 950°C under the same conditions, the thermal corrosion resistance of the nickel-based alloy containing rhenium was obviously better than that of the nickel-based alloy containing tungsten. The hot-corrosion resistance of the GH4169 alloy without adding any element was slightly better than that of the alloy with tungsten.

Publisher

Thomas Telford Ltd.

Subject

Condensed Matter Physics,General Materials Science

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