Grain boundary susceptibility to liquid metal embrittlement during wire arc additive manufacturing of a bronze/stainless steel bimetallic structure

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-04-16 DOI:10.1016/j.matchar.2025.115058

Mahdi Mahmoudiniya , Marcel J.M. Hermans , Leo A.I. Kestens

引用次数: 0

Abstract

In the present study, the crystallography aspects of the liquid metal embrittlement (LME) phenomenon are investigated in a bi-metallic bronze-stainless steel structure, produced using wire arc additive manufacturing. Most of the LME cracks were found to be propagated along high-angle grain boundaries of the austenitic structure. Surprisingly, it was observed that in some cases, LME cracks propagated transgranularly in austenite grains, which is a rare phenomenon in LME of steels. The Ʃ3-coincidence site lattice (CLS) boundaries showed the highest resistance to LME compared to other CLS types. It was also found that the presence of elongated grains in additively manufactured microstructures can accelerate the LME phenomenon.

查看原文本刊更多论文

青铜/不锈钢双金属组织电弧增材制造过程中晶界对液态金属脆化的敏感性

在本研究中，液态金属脆化（LME）现象的结晶学方面的研究在双金属青铜不锈钢结构，采用电弧增材制造。大多数LME裂纹沿奥氏体组织的高角度晶界扩展。令人惊讶的是，在某些情况下，LME裂纹在奥氏体晶粒中穿晶扩展，这在钢的LME中是罕见的现象。与其他CLS类型相比，Ʃ3-coincidence位点晶格（CLS）边界显示出最高的LME抗性。在增材制造的微观组织中，细长晶粒的存在可以加速LME现象。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.