Superb creep lives of Ni-based single crystal superalloy through size effects and strengthening heterostructure γ/γʹ interfaces

Long Haibo; Zhao Yunsong; Zhao Junbo; Yuan Xiaoyi; Fan Hao; Luo Yushi; Li Wei; An Zibing; Mao Shengcheng; Liu Gang; Han Xiaodong

doi:10.1360/nso/20230042

National Science Open (Dec 2023)

Superb creep lives of Ni-based single crystal superalloy through size effects and strengthening heterostructure γ/γʹ interfaces

Long Haibo,
Zhao Yunsong,
Zhao Junbo,
Yuan Xiaoyi,
Fan Hao,
Luo Yushi,
Li Wei,
An Zibing,
Mao Shengcheng,
Liu Gang,
Han Xiaodong

Affiliations

Long Haibo: ["Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China"]
Zhao Yunsong: ["Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China"]
Zhao Junbo: ["Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China"]
Yuan Xiaoyi: ["Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China"]
Fan Hao: ["Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China"]
Luo Yushi: ["Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China"]
Li Wei: ["Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China"]
An Zibing: ["Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China"]
Mao Shengcheng: ["Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China"]
Liu Gang: ["Department of Mechanical Engineering, Southern University of Science and Technology, Guangdong 518055, China"]
Han Xiaodong: ["Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China","Department of Materials Science and Engineering, Southern University of Science and Technology, Guangdong 518055, China"]

DOI: https://doi.org/10.1360/nso/20230042
Journal volume & issue: Vol. 3

Abstract

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This study presents a design strategy to enhance the high-temperature creep resistance of Ni-based superalloys. This strategy focuses on two principles: (1) minimizing the dimensions of γ/γ′ interfaces and γ channels by reducing the size of the γ′ phase; (2) key alloy composition control to strengthen the heterostructure γ/γ′ interfaces. This strategy proved very effective by the designed three superalloys’ prolonged creep lives. An alloy exhibits ultra-long creep life by 388 h at 1100°C/137 MPa, which runs at the highest level among those alloys without Ru addition. With Ru addition, an alloy that lasted for 748 h with a creep strain of ~6% at 1110°C/137 MPa is developed. This study provides a new route of high-temperature creep lives through heterostructure interfacial design with size effects and key alloying elements.

Published in National Science Open

ISSN: 2097-1168 (Print); 2097-1400 (Online)
Publisher: Science Press
Country of publisher: China
LCC subjects: Science; Technology: Engineering (General). Civil engineering (General)
Website: https://www.sciengine.com/NSO/home

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