Effect of Sintering Atmosphere and Compaction on Mechanical and Electrochemical Properties of Ferritic (434L) Stainless Steel

IF 1.4 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

International Journal of Steel Structures Pub Date : 2025-07-12 DOI:10.1007/s13296-025-00981-5

Akhileshwar Nirala, Shatrughan Soren

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引用次数: 0

Abstract

The production of stainless-steel systems has created a major impact on the advancement of technology and its application in various industries. The failure of stainless-steel machinery and structural components can be attributed to the important role played by mechanical and electrochemical properties. Thus, there is ample room for enhancement in these domains. The powder was compacted using cold compaction through single-action uniaxial pressing; applying a pressure of 600 MPa. Hydrogen sintering produced a refined pore structure, enhancing strength (222 MPa YS, 410 MPa UTS) but reducing ductility (13.9% elongation). Mixed-atmosphere sintering improved ductility (23.5% elongation) but lowered strength (188 MPa YS, 359 MPa UTS). It has been noted that the specimens sintered in a hydrogen sintering atmosphere exhibited a significant increase of 11 and 18% in the ultimate tensile strength and yield strength, respectively, compared to the specimens sintered in a mixed atmosphere. Fractography showed more ductile features in hydrogen-sintered specimens. Corrosion resistance was higher in mixed-atmosphere sintering, with a lower OCP ( − 399 mV). These results highlight the critical role of sintering conditions in material performance optimization.

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烧结气氛和压实对铁素体（434L）不锈钢力学和电化学性能的影响

不锈钢系统的生产对技术的进步及其在各个行业的应用产生了重大影响。不锈钢机械和结构部件的失效可归因于力学和电化学性能的重要作用。因此，在这些领域有很大的改进空间。采用单轴单作用冷压法对粉末进行压实；施加压力为600mpa。氢烧结产生了精细的孔隙结构，提高了强度（222mpa YS, 410mpa UTS），但降低了延展性（13.9%伸长率）。混合气氛烧结提高了延展性（伸长率23.5%），但降低了强度（188mpa YS, 359 MPa UTS）。结果表明，与混合气氛下烧结的试样相比，在氢气气氛下烧结的试样的极限抗拉强度和屈服强度分别提高了11%和18%。氢烧结试样的断口形貌显示出更强的韧性特征。混合气氛烧结具有较低的OCP (- 399 mV)，耐蚀性较高。这些结果突出了烧结条件在材料性能优化中的关键作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Steel Structures 工程技术-工程：土木

CiteScore

2.70

自引率

13.30%

发文量

122

审稿时长

12 months

期刊介绍： The International Journal of Steel Structures provides an international forum for a broad classification of technical papers in steel structural research and its applications. The journal aims to reach not only researchers, but also practicing engineers. Coverage encompasses such topics as stability, fatigue, non-linear behavior, dynamics, reliability, fire, design codes, computer-aided analysis and design, optimization, expert systems, connections, fabrications, maintenance, bridges, off-shore structures, jetties, stadiums, transmission towers, marine vessels, storage tanks, pressure vessels, aerospace, and pipelines and more.