Influence of Alloy 625 Manufacturing Process on 950 °C Oxidation Behavior in Air and Post-oxidation High-Cycle Fatigue Performance

IF 2.1 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Oxidation of Metals Pub Date : 2024-08-06 DOI:10.1007/s11085-024-10286-3

G. de Leon Nope, G. Wang, B. Gleeson

引用次数: 0

Abstract

This study investigates the effect of the Alloy 625 manufacturing process on the high-cycle fatigue (HCF) performance of oxidized samples. Conventional manufacturing processes (wrought and casting) and additive manufacturing (AM) processes (laser powder bed fusion and direct energy deposition) were studied. Results of Alloy 625 isothermal oxidation at 950 °C in air revealed that AM samples showed faster oxidation kinetics and enhanced intergranular oxidation (IGO) with associated voids; the latter two were attributed partially to the alloy's greater amount of interstitial oxygen compared to conventional manufacturing processes. The HCF results showed that oxidized AM samples have a shorter life than oxidized wrought counterparts, where the earlier crack initiation in the oxidized AM samples is attributed to greater oxidation-induced subsurface degradation. This subsurface degradation includes the enhanced IGO and associated voids.

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合金 625 制造工艺对 950 °C 空气氧化行为和氧化后高循环疲劳性能的影响

本研究探讨了合金 625 制造工艺对氧化样品高循环疲劳 (HCF) 性能的影响。研究了传统制造工艺（锻造和铸造）和快速成型制造（AM）工艺（激光粉末床熔融和直接能量沉积）。合金 625 在 950 °C 空气中的等温氧化结果表明，AM 样品的氧化动力学更快，晶间氧化（IGO）增强，并伴有空隙；与传统制造工艺相比，后两者部分归因于合金中更多的间隙氧。HCF 结果表明，氧化的 AM 样品比氧化的锻造样品寿命更短，氧化 AM 样品中更早出现裂纹的原因是更大程度的氧化引起的次表层降解。这种次表层降解包括增强的 IGO 和相关空隙。

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

Oxidation of Metals 工程技术-冶金工程

CiteScore

5.10

自引率

9.10%

发文量

审稿时长

2.2 months

期刊介绍： Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.