Corrosion Behavior in Molten Salts at 850 ℃ and Its Effect on Mechanical Properties of Hastelloy X Alloy Fabricated by Additive Manufacturing

doi:10.11902/1005.4537.2022.254

Journal of Chinese Society for Corrosion and protection

2023, Vol. 43

Issue (3): 671-676 DOI: 10.11902/1005.4537.2022.254

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Corrosion Behavior in Molten Salts at 850 ℃ and Its Effect on Mechanical Properties of Hastelloy X Alloy Fabricated by Additive Manufacturing

SHANG Jin¹, GU Yan²(

), ZHAO Jing³, WANG Zhe², ZHANG Bo⁴, ZHAO Tongjun⁵, CHEN Zehao⁵, WANG Jinlong⁵

^1.Aero Engine Corporation of China Co. Ltd., Shanghai 200240, China
^2.Shenyang Liming Aero-Engine Co. Ltd., Aero Engine Corporation of China, Shenyang 110043, China
^3.Nuclear Power Institute of China, Chengdu 610041, China
^4.China Electronic Product Reliability and Environmental Testing Research Institute, Guangzhou 510610, China
^5.Corrosion and Protection Division, Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China

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Abstract

The hot corrosion behavior in molten salt (75%Na₂SO₄+25%K₂SO₄) at 850 ^oC of Hastelloy X alloy made by additive manufacturing was studied, and then the room temperature mechanical properties of the alloy after molten salts corrosion were also assessed. The results show that the corrosion products of Hastelloy X are mainly composed of Ni-, Ti- and Cr-oxides. After hot corrosion for different times, the tensile strength of the additive manufactured alloy at room temperature changes little, while the rupture strength and plasticity decrease significantly, which may be ascribed to the change of the surface state and structure of the alloy induced by the molten salts corrosion process in terms of the effect of temperature and corrosion.

Key words: additive manufacturing hot corrosion mechanical property

Received: 08 August 2022 32134.14.1005.4537.2022.254

ZTFLH:

TG172

Fund: National Natural Science Foundation of China(51801021);Ministry of Industry and Information Technology Project(MJ-2017-J-99);Fundamental Research Funds for the Central Universities(N2102015)

Corresponding Authors: GU Yan, E-mail: guyan19811102@163.com

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	SHANG Jin
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	ZHAO Tongjun
	CHEN Zehao
	WANG Jinlong

Cite this article:

SHANG Jin, GU Yan, ZHAO Jing, WANG Zhe, ZHANG Bo, ZHAO Tongjun, CHEN Zehao, WANG Jinlong. Corrosion Behavior in Molten Salts at 850 ℃ and Its Effect on Mechanical Properties of Hastelloy X Alloy Fabricated by Additive Manufacturing. Journal of Chinese Society for Corrosion and protection, 2023, 43(3): 671-676.

URL:

https://www.jcscp.org/EN/10.11902/1005.4537.2022.254 OR https://www.jcscp.org/EN/Y2023/V43/I3/671

Fig.1 Shape and size of specimen for room temperature tensile and endurance tests (mm)

Fig.2 Mass changes of additively manufactured Hastelloy X alloy after hot corrosion for different time

Fig.3 XRD patterns of additively manufactured Hastelloy X alloy before and after hot corrosion for 25, 50 and 100 h

Fig.4 Surface morphologies of additively manufactured Hastelloy X alloy after hot corrosion for 25 h (a), 50 h (b) and 100 h (c)

Table 1 EDS results of hot corrosion products formed on Hastelloy X alloy after hot corrosion for different time

Fig.5 Microstructures of additively manufactured Hastelloy X alloy before (a) and after hot corrosion for 25 h (b), 50 h (c) and 100 h (d)

Fig.6 Tensile strengths of additively manufactured Hast-elloy X alloy after hot corrosion for different time

Fig.7 Tensile fractures of additively manufactured Hastelloy X alloy after hot corrosion for 0 h (a), 25 h (b), 50 h (c) and 100 h (d)

Fig.8 Durable performances of additive-manufactured Hastelloy X alloy after hot corrosion for different time

Fig.9 Durable test fractures of additive-manufactured Hastelloy X alloy after hot corrosion for 0 h (a), 25 h (b), 50 h (c) and 100 h (d)

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