Comparison of gaseous hydrogen effects in 1200 MPa high strength martensitic and pearlitic steels

IF 7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science and Engineering: A Pub Date : 2025-02-01 Epub Date: 2025-01-16 DOI:10.1016/j.msea.2025.147875

Thorsten Michler , Lisa Claeys , Sabine Oeser , Tom Depover

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Abstract

This study compares gaseous hydrogen effects in a high strength martensitic and pearlitic steel (ultimate tensile strength of 1200–1300 MPa). When tensile tested in 10 MPa gaseous hydrogen at room temperature, the relative reduction of area (RRA) is 14 % for the martensitic steel while the pearlitic steel shows much improved behaviour with an RRA of 75 %. The microstructures of both steels are characterized in detail pre- and post-mortem. Fractography reveals that hydrogen assisted fracture occurs predominantly along prior austenite grain boundaries for the martensitic steel while tearing topography surface characteristics are observed for the pearlitic steel. Thermal desorption spectroscopy measurements show similar total hydrogen contents of about 2 wppm in both microstructures. In the martensitic microstructure, hydrogen is weakly trapped, whereas in the pearlitic microstructure, about 30 % of the hydrogen is strongly trapped. This seems to be one important reason for the higher RRA of the pearlitic microstructure in 10 MPa gaseous hydrogen.

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1200mpa高强度马氏体钢和珠光体钢中气态氢效应的比较

本研究比较了气体氢在高强度马氏体钢和珠光体钢（极限抗拉强度1200-1300 MPa）中的作用。室温下，在10mpa气体氢中进行拉伸试验时，马氏体钢的相对面积缩减率（RRA）为14%，而珠光体钢的相对面积缩减率（RRA）为75%。对两种钢的显微组织进行了详细的分析。断口形貌表明，马氏体钢的氢辅助断口主要沿奥氏体晶界断裂，而珠光体钢的氢辅助断口具有撕裂形貌表面特征。热解吸光谱测量表明，两种微观结构中总氢含量相似，约为2wppm。在马氏体组织中，氢被弱捕获，而在珠光体组织中，约30%的氢被强捕获。这可能是10mpa气态氢条件下珠光体组织RRA较高的一个重要原因。

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.