通过两步梯度冷却策略增强 Super304H 的耐晶间腐蚀性能

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2024-10-28 DOI:10.1016/j.matlet.2024.137628

Puli Wang , Jinyao Ma , Peizhi Cui , Tong Wang , Nan Dong , Peide Han

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引用次数: 0

摘要

添加铌（Nb）可通过形成铌（C，N）沉淀物提高 Super304H 的热稳定性。本研究提出了一种创新的两步梯度冷却策略，可促进基体中分散的铁、铬、镍轮铌（C，N）再析出。在 650 °C 等温时效期间，与溶液处理的 Super304H 相比，通过该策略可显著抑制 M23C6 在晶界 (GB) 的有害析出。通过该策略优化 Nb（C，N）的分布和元素，对于提高 Super304H 在服役期间的热稳定性和抗晶间腐蚀（IGC）能力具有重要意义。

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Enhancement of intergranular corrosion resistance of Super304H by a two-step gradient cooling strategy

Niobium (Nb) addition could enhance the thermal stability of Super304H through the formation of Nb(C, N) precipitates. This study proposes an innovative two-step gradient cooling strategy that promotes dispersed Fe, Cr, Ni-round Nb(C, N) re-precipitation in the matrix. Through the strategy, the deleterious precipitation of M₂₃C₆ at grain boundaries (GBs) is significantly inhibited compared to the solution-treated Super304H during 650 °C isothermal aging. The distribution and element optimized Nb(C, N) through the strategy is of great significance for improving the thermal stability and intergranular corrosion (IGC) resistance of Super304H during service.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive