Effect of decarburization-induced abnormal grain growth on the formation of cracks in ASTM A335 grade P11 low alloy steel seamless pipes

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2025-05-24 DOI:10.1016/j.engfailanal.2025.109755

Dhanendra Kumar Sahu , Nilesh Suryawanshi , Dhananjay Bajpeyee , M.J.N.V. Prasad

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引用次数: 0

Abstract

The present study investigated the cause of the frequent failures of the hot-pierced and stretch-rolled low alloy ASTM A335 Grade P11 low alloy steel pipes consisting of ferrite and pearlite microstructure. A detailed microstructural examination that includes optical microscopy and scanning electron microscopy in conjunction with electron back-scattered diffraction (EBSD) and energy dispersive spectroscopy (EDS) was performed across the thickness of the failed and sound pipe samples. Microhardness measurements were performed to evaluate the microstructural inhomogeneity, if any across the thickness of the failed and sound pipe samples. It has been noticed that the substantial fraction of abnormally grown ferrite grains in thick decarburized layers, being softer in nature, could not resist the applied pressures and thereby resulted in easy cracking under tensile loading condition thus leading to the failure of the steel pipes during subsequent hydro-pressure testing or in application.

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脱碳诱导的异常晶粒长大对ASTM A335级P11低合金钢无缝管裂纹形成的影响

本文研究了由铁素体和珠光体组织组成的低合金ASTM A335级P11低合金热刺和拉伸管频繁失效的原因。详细的显微结构检查包括光学显微镜和扫描电子显微镜，结合电子背散射衍射（EBSD）和能量色散光谱（EDS），对失效和音管样品的厚度进行了详细的显微结构检查。显微硬度测量是为了评估微观组织的不均匀性，如果有任何跨厚度的失败和健全的管道样品。注意到，在厚脱碳层中有相当一部分异常生长的铁素体晶粒，其性质较软，不能抵抗施加的压力，因此在拉伸加载条件下容易开裂，从而导致钢管在后续的水压试验或使用中失效。

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

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.