Creep deformation and fracture of Ni-based alloy GH3535 in molten FLiNaK and Ar environment

IF 7.4 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-07-01 Epub Date: 2025-03-31 DOI:10.1016/j.corsci.2025.112902
Xiaoli Li , Litao Chang , Wenjun Liang , Chengpeng Liu , Zhijun Li , Yumiao Wang , Bin Leng
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Abstract

The creep deformation and fracture behavior of GH3535 alloy under varying stresses (190–270 MPa) in 700 °C molten FLiNaK salt and argon environments were systematically investigated. Under each experimental stress, specimens in molten FLiNaK salt exhibit lower fracture life and elongation compared to those in argon, with the disparity becoming more pronounced as the applied stress decreases. The alloy show a combination of ductile overload failure and intergranular fracture in both environments, whereas intergranular fracture is more pronounced in the molten salt environment. Notably, crack density and depth are greater in the molten salt environment due to its corrosive nature.
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ni基合金GH3535在熔融flak和Ar环境中的蠕变变形与断裂
系统地研究了GH3535合金在700℃熔融熔融盐和氩气环境下190 ~ 270 MPa变应力下的蠕变变形和断裂行为。在不同的实验应力下,熔融FLiNaK盐中的试样的断裂寿命和伸长率均低于氩气中的试样,且随着外加应力的减小,这种差异越来越明显。合金在两种环境下均表现为韧性过载破坏和沿晶断裂的结合,而在熔盐环境下,沿晶断裂更为明显。值得注意的是,在熔盐环境中,由于其腐蚀性,裂纹密度和深度更大。
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来源期刊
Corrosion Science
Corrosion Science 工程技术-材料科学:综合
CiteScore
13.60
自引率
18.10%
发文量
763
审稿时长
46 days
期刊介绍: Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.
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