Development of a low-density Co-Ni-Al-Ta-Cr superalloy with high mechanical performance and superior oxidation resistance

Cuiping Wang; Haojun Zhuo; Debin Zheng; Xiang Yu; Xiaodong Chen; Yuechao Chen; Xin Chen; Jinbin Zhang; Jiajia Han; Xingjun Liu

Materials & Design (Feb 2024)

Development of a low-density Co-Ni-Al-Ta-Cr superalloy with high mechanical performance and superior oxidation resistance

Cuiping Wang,
Haojun Zhuo,
Debin Zheng,
Xiang Yu,
Xiaodong Chen,
Yuechao Chen,
Xin Chen,
Jinbin Zhang,
Jiajia Han,
Xingjun Liu

Affiliations

Cuiping Wang: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen University, Xiamen 361005, PR China
Haojun Zhuo: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen University, Xiamen 361005, PR China
Debin Zheng: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen University, Xiamen 361005, PR China
Xiang Yu: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China; Institute of Materials Genome and Big Data, Harbin Institute of Technology, Shenzhen 518055, PR China
Xiaodong Chen: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen University, Xiamen 361005, PR China
Yuechao Chen: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen University, Xiamen 361005, PR China
Xin Chen: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen University, Xiamen 361005, PR China
Jinbin Zhang: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen University, Xiamen 361005, PR China
Jiajia Han: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen University, Xiamen 361005, PR China; Corresponding authors at: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China.
Xingjun Liu: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China; Xiamen Key Laboratory of High Performance Metals and Materials, Xiamen University, Xiamen University, Xiamen 361005, PR China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, PR China; Institute of Materials Genome and Big Data, Harbin Institute of Technology, Shenzhen 518055, PR China; Corresponding authors at: College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, Xiamen University, Xiamen 361005, PR China.

Journal volume & issue: Vol. 238
p. 112673

Abstract

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In this study, a Co-30Ni-10Al-6Ta-10Cr alloy was designed based on CALPHAD (Calculation of Phase Diagrams) method targeting high γ′ phase fraction and solvus, and optimal thermal processing window. Experimental results concurred with the calculations and validated Cr as a γ phase-forming element in Co-Ni-Al-Ta-based alloys. The incorporation of Cr in the alloy helps mitigate lattice misfit, coarsening rate, and alloy density, while enhancing microstructural stability. A certain amount of Cr led to the development of a superalloy with both high mechanical performance γ′ solvus and low density. Moreover, the oxidation resistance of the Co-Ni-Al-Ta-based high-temperature alloy can be substantially elevated by the introduction of Cr. At 1000 °C, the Co-30Ni-10Al-6Ta-10Cr alloy displayed comparatively low oxidation weight gain, which signifies its excellent oxidation resistance. This is mainly attributed to the formation of continuous (Co,Ni)(Al,Cr)2O4 spinel oxide layers during prolonged oxidation.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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