采用原位应力-电化学方法对不同工艺制备的7A52铝合金的应力腐蚀行为进行了研究

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-08-24 DOI:10.1016/j.corsci.2025.113269

Jinghan Yang , Xingyu Chen , Linyang Wu , Xiaoyun Ding , Jinchao Jiao , Menghui Cui , Yong Lian , Jin Zhang , Pengfei Ji , Shuai Wu , Yan Su

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引用次数: 0

摘要

提出了一种利用原位应力耦合电化学阻抗谱（EIS）定量监测四点弯曲加载条件下应力腐蚀开裂（SCC）行为的新方法。系统比较表明，粉末冶金（PM）和传统熔融铸造（CM） 7A52铝合金具有明显的SCC敏感性，在不同的拉伸弹性应力下，PM 7A52表现出延迟的SCC起始，更低的应力松弛和更浅的裂纹扩展。裂纹通过穿晶和沿晶两种模式扩展。PM 7A52抗SCC性能的提高主要是由于阳极溶解和晶体取向的共同作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Stress corrosion behavior using in-situ stress-electrochemical method of 7A52 aluminum alloy prepared by various processes

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Stress corrosion behavior using in-situ stress-electrochemical method of 7A52 aluminum alloy prepared by various processes

A novel method is proposed to quantitatively monitor stress corrosion cracking (SCC) behavior under four-point bending loading conditions using in-situ stress-coupled electrochemical impedance spectroscopy (EIS). A systematic comparison reveals distinct SCC susceptibility between powder metallurgy (PM) and conventional melt-cast (CM) 7A52 aluminum alloys, with the PM 7A52 exhibiting delayed SCC initiation, lower stress relaxation, and shallower crack propagation under varying tensile elastic stresses. The cracks propagate through both transgranular and intergranular modes. The improved SCC resistance of PM 7A52 is primarily attributed to the combined effects of anodic dissolution and crystallographic orientation.

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来源期刊

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.