搅拌摩擦焊625合金晶间腐蚀敏感性的定量分析

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Engineering, Science and Technology Pub Date : 2022-12-02 DOI:10.1080/1478422X.2022.2152174

E. B. Fonseca, A. Z. Fatichi, M. Terada, A. Bugarin, José Raúl Rodríguez Rodríguez, I. Costa, A. Ramirez

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引用次数: 0

摘要

625合金是一种用于航空航天、能源、化工、石油和天然气行业的镍基合金，由于其耐腐蚀、高强度和耐高温蠕变性能，主要用作覆层材料。在本研究中，研究了基底金属和搅拌摩擦焊接625合金的微观结构评估和晶间腐蚀敏感性。与基底金属相比，搅拌摩擦焊接接头表现出较低的腐蚀速率和敏化程度。这主要是由于搅拌摩擦焊接过程中晶粒细化和冷却速度较低。与母材相比，本焊缝的搅拌区具有更细的晶粒结构和更低的孪晶边界密度，并改善了力学性能和腐蚀性能。

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Quantitative analysis of susceptibility to intergranular corrosion in alloy 625 joined by friction stir welding

ABSTRACT Alloy 625 is a Ni-based alloy used in aerospace, energy, chemical, oil and gas industries, mainly as cladding material due to its corrosion resistance, high strength and creep resistance at high temperature. In this study, microstructural evaluation and susceptibility to intergranular corrosion of base metal and friction stir welded Alloy 625 were investigated. Friction stir welded joints exhibited a lower corrosion rate and degree of sensitisation compared to the base metal. It is mainly due to grain refinement and lower cooling rate of the friction stir welding process. The stir zone of the present weld has a finer grain structure and lower density of twin boundaries than the base metal and it led to the improvement of the mechanical and corrosion properties.

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来源期刊

Corrosion Engineering, Science and Technology 工程技术-材料科学：综合

CiteScore

3.20

自引率

5.60%

发文量

审稿时长

3.4 months

期刊介绍： Corrosion Engineering, Science and Technology provides broad international coverage of research and practice in corrosion processes and corrosion control. Peer-reviewed contributions address all aspects of corrosion engineering and corrosion science; there is strong emphasis on effective design and materials selection to combat corrosion and the journal carries failure case studies to further knowledge in these areas.