Distinct mechanism governing selective leaching of elements from ferrite and austenite in 600 °C lead-bismuth eutectic

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2025-06-14 DOI:10.1016/j.scriptamat.2025.116818

Decang Zhang , Xiaoxin Zhang , Xian Zeng , Chenxi Zhu , Fanao Meng , Qingzhi Yan

引用次数: 0

Abstract

An austenite-ferrite steel was exposed to oxygen-depleted lead-bismuth eutectic (LBE) at 600 °C to investigate the differences in selective leaching of elements between austenite and ferrite. The selective leaching of austenite was primarily governed by the coupled dissolution-reprecipitation (CDR) mechanism, while the selective leaching of ferrite appeared to be controlled by solid-state diffusion (SSD). This difference is likely attributed to the higher thermodynamic stability of ferrite than austenite in LBE. The variation in selective leaching mechanisms may help explain the lower dissolution corrosion susceptibility of ferrite relative to austenite.

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600℃铅铋共晶中铁素体和奥氏体元素选择性浸出的独特机制

将奥氏体-铁素体钢置于缺氧铅铋共晶（LBE）中600℃，研究奥氏体和铁素体对元素选择性浸出的差异。奥氏体的选择性浸出主要受溶蚀-再沉淀（CDR）耦合机制控制，而铁素体的选择性浸出主要受固态扩散（SSD）机制控制。这种差异可能是由于铁素体比奥氏体在LBE中具有更高的热力学稳定性。选择性浸出机制的变化可能有助于解释铁素体相对于奥氏体较低的溶解腐蚀敏感性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.