Effect of Cu on microstructure evolution and mechanical properties of Fe-Nb dissimilar welds

被引：6

作者：

Chu, Qiaoling ^{[1
,2
]}

Zhang, Min ^{[1
]}

Li, Jihong ^{[1
]}

Yan, Fuxue ^{[1
]}

Yan, Cheng ^{[2
]}

机构：

[1] Xian Univ Technol, Coll Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China

[2] QUT, Sci & Engn Fac, Sch Chem Phys & Mech Engn, Brisbane, Qld 4001, Australia

来源：

MATERIALS LETTERS | 2019年 / 234卷

基金：

澳大利亚研究理事会;

关键词：

Microstructure; Intermetallics; Phase transformation; Nanoindentation; STAINLESS-STEEL; IRON-NIOBIUM; ALLOY; METAL;

D O I：

10.1016/j.matlet.2018.09.086

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, we report a thorough study of phase formation in Fe-Nb weld metals using a combination of microscopy and composition analysis. The correlation of microstructure and mechanical properties was established by nanoindentation. A simplified scenario of weld formation was proposed. Nb weld metal was dominated by the coarse Laves phase (Fe2Nb) with high hardness (similar to 20.4 GPa). With the addition of Cu, sound weld metal was obtained with alternative distribution of alpha-Fe, Cu phases and fine eutectic phases (alpha-Fe + Fe2Nb). These transformation products with lower hardness (alpha-Fe + Fe2Nb similar to 11.6 GPa) improved the overall mechanical properties of the weld metal. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：113 / 116

页数：4

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