Metallurgical, mechanical, and corrosion behavior of AISI 304L joints welded using variable arc energy inputs and subjected to thermal aging

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-11 DOI:10.1177/14644207241238200

Subodh Kumar, Amandeep S Shahi, Varun Sharma, Dikshant Malhotra

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Abstract

The effect of three levels of welding arc energy input on the metallurgical, mechanical, and corrosion behavior of AISI 304L stainless steel was studied with the aim of investigating and recommending the most useful range of process parameters for improved performance of engineering structures made from this industrially important alloy. The gas tungsten arc welding process was employed, and all the joints were butt-welded using a single-V groove design. With an increase in heat input, the δ-ferrite phase changed from lathy to vermicular, besides the heat-affected zones of all the welds exhibiting grain coarsening effects. Postweld thermal aging led to the preferential occurrence of carbides in the interdendritic regions, which degraded their corrosion performance. Thermal aging did not affect the tensile strength of these welds, but their ductility was significantly impacted. The extent of segregation of Cr and C, especially, was observed to be the least in the case of low heat input welds. This study establishes that while designing welding procedures for AISI 304L structures, low welding arc energy should be used as it promotes better mechanical as well as corrosion properties.

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使用可变电弧能量输入焊接并经过热时效处理的 AISI 304L 接头的冶金、机械和腐蚀行为

研究了三种水平的焊接电弧能量输入对 AISI 304L 不锈钢的冶金、机械和腐蚀行为的影响，目的是调查和推荐最有用的工艺参数范围，以提高用这种重要工业合金制造的工程结构的性能。研究采用了气体钨极氩弧焊工艺，所有接头均采用单 V 形槽对焊设计。随着输入热量的增加，δ-铁素体相从腊状变为蠕变状，此外，所有焊缝的热影响区都表现出晶粒粗化效应。焊后热时效导致碳化物优先出现在树枝状晶间区域，从而降低了其腐蚀性能。热老化并不影响这些焊缝的抗拉强度，但其延展性受到严重影响。据观察，在低热输入焊缝中，铬和碳的偏析程度最小。这项研究表明，在为 AISI 304L 结构设计焊接程序时，应使用低焊接电弧能量，因为它能提高机械性能和腐蚀性能。

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

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 工程技术-材料科学：综合

CiteScore

4.70

自引率

8.30%

发文量

166

审稿时长

3 months

期刊介绍： The Journal of Materials: Design and Applications covers the usage and design of materials for application in an engineering context. The materials covered include metals, ceramics, and composites, as well as engineering polymers. "The Journal of Materials Design and Applications is dedicated to publishing papers of the highest quality, in a timely fashion, covering a variety of important areas in materials technology. The Journal''s publishers have a wealth of publishing expertise and ensure that authors are given exemplary service. Every attention is given to publishing the papers as quickly as possible. The Journal has an excellent international reputation, with a corresponding international Editorial Board from a large number of different materials areas and disciplines advising the Editor." Professor Bill Banks - University of Strathclyde, UK This journal is a member of the Committee on Publication Ethics (COPE).