Effects of heat treatment on the oxidation resistance of laser powder bed fusion printed 316L stainless steel in 600°C supercritical CO2

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

Scripta Materialia Pub Date : 2025-07-16 DOI:10.1016/j.scriptamat.2025.116886

Xin Ma , Zeyu Tao , Zaiqing Que , Huajing Fang , Wenjun Kuang

引用次数: 0

Abstract

The effects of post heat treatments on the oxidation behavior of laser powder bed fusion (LPBF) printed-316 L stainless steel (SS) in 600 °C supercritical CO₂ were studied. The oxidation resistance was gradually deteriorated with increasing treatment temperature. That is because: 1, the high dislocation density in LPBF-316 L SS, which promotes the formation of protective oxide film by facilitating the diffusion of active elements, was decreased after heat treatment. 2, the density of twin boundary which is subject to general oxidation was increased, while that of low angle grain boundary which can passivate was decreased remarkably after hot isostatic pressing, thus decreasing the fraction of passivated grain boundaries.

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600℃超临界CO2中热处理对激光粉末床熔融印刷316L不锈钢抗氧化性能的影响

研究了热处理后热处理对激光粉末床熔融（LPBF）印刷316l不锈钢（SS）在600℃超临界CO2中氧化行为的影响。随着处理温度的升高，其抗氧化性能逐渐变差。这是因为：1、LPBF-316 L SS中通过促进活性元素扩散而促进氧化保护膜形成的高位错密度在热处理后降低。2、经热等静压后，易发生一般氧化的孪晶界密度增加，而可钝化的低角度晶界密度明显降低，从而降低了钝化晶界的比例。

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.